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		<id>http://virt10.itu.chalmers.se/index.php?action=history&amp;feed=atom&amp;title=Persistent_Game_Worlds</id>
		<title>Persistent Game Worlds - Revision history</title>
		<link rel="self" type="application/atom+xml" href="http://virt10.itu.chalmers.se/index.php?action=history&amp;feed=atom&amp;title=Persistent_Game_Worlds"/>
		<link rel="alternate" type="text/html" href="http://virt10.itu.chalmers.se/index.php?title=Persistent_Game_Worlds&amp;action=history"/>
		<updated>2026-05-05T10:14:07Z</updated>
		<subtitle>Revision history for this page on the wiki</subtitle>
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	<entry>
		<id>http://virt10.itu.chalmers.se/index.php?title=Persistent_Game_Worlds&amp;diff=24272&amp;oldid=prev</id>
		<title>Staffan Björk at 10:37, 23 November 2015</title>
		<link rel="alternate" type="text/html" href="http://virt10.itu.chalmers.se/index.php?title=Persistent_Game_Worlds&amp;diff=24272&amp;oldid=prev"/>
				<updated>2015-11-23T10:37:24Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table class='diff diff-contentalign-left'&gt;
				&lt;col class='diff-marker' /&gt;
				&lt;col class='diff-content' /&gt;
				&lt;col class='diff-marker' /&gt;
				&lt;col class='diff-content' /&gt;
				&lt;tr style='vertical-align: top;' lang='en'&gt;
				&lt;td colspan='2' style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan='2' style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 10:37, 23 November 2015&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l19&quot; &gt;Line 19:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 19:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;One typical requirement of [[Persistent Game Worlds]] is to keep track of [[Characters]] and [[Game Items]], but not all [[Game Items]] need to be persistent (e.g. [[Power-Ups]]). For [[Tick-Based Games]] this means updating them whether or not players interact with the game system between ticks. This may include activating [[Resource Generators]] and [[Spawn Points]] but this may also require other functions to avoid creating too many instances or to [[Encouraged Return Visits|Encourage Return Visits]] more frequently. The latter can for example be to have [[Budgeted Action Points]] that are [[Regenerating Resources]] which replenish over time. The handling of [[Resources|Resource]] flow needs to be handled for other purposes as well, including balancing the value of the various kinds of [[Resources]] against each other and ensuring that there are not too little of any type. This means considering overall how [[Producers]] and [[Consumers]] can interact in [[Producer-Consumer]] chains to create [[Emergent Gameplay]], and how specific issues such as [[Spawning]] and [[Crafting]] should be handled. One solution is to try and create [[Closed Economies]] (which was tried for [[Ultima Online]] but didn't find a stable equilibrium) or a [[Faucet/Drain]] model (e.g. [[World of Warcraft]] or [[FarmVille]]). In general, [[Persistent Game Worlds]] need to have all [[Resources]] as [[Renewable Resources|Renewable]] ones rather than [[Non-Renewable Resources|Non-Renewable]] ones.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;One typical requirement of [[Persistent Game Worlds]] is to keep track of [[Characters]] and [[Game Items]], but not all [[Game Items]] need to be persistent (e.g. [[Power-Ups]]). For [[Tick-Based Games]] this means updating them whether or not players interact with the game system between ticks. This may include activating [[Resource Generators]] and [[Spawn Points]] but this may also require other functions to avoid creating too many instances or to [[Encouraged Return Visits|Encourage Return Visits]] more frequently. The latter can for example be to have [[Budgeted Action Points]] that are [[Regenerating Resources]] which replenish over time. The handling of [[Resources|Resource]] flow needs to be handled for other purposes as well, including balancing the value of the various kinds of [[Resources]] against each other and ensuring that there are not too little of any type. This means considering overall how [[Producers]] and [[Consumers]] can interact in [[Producer-Consumer]] chains to create [[Emergent Gameplay]], and how specific issues such as [[Spawning]] and [[Crafting]] should be handled. One solution is to try and create [[Closed Economies]] (which was tried for [[Ultima Online]] but didn't find a stable equilibrium) or a [[Faucet/Drain]] model (e.g. [[World of Warcraft]] or [[FarmVille]]). In general, [[Persistent Game Worlds]] need to have all [[Resources]] as [[Renewable Resources|Renewable]] ones rather than [[Non-Renewable Resources|Non-Renewable]] ones.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Existing independently of players' play sessions is rather pointless if players need to synchronize when they should all interact with the [[Persistent Game Worlds]]. For this reason, use of the pattern implies&amp;#160; supporting [[Late Arriving Players]] and [[Drop-In/Drop-Out]] gameplay. This also makes [[Persistent Game Worlds]] partly support [[Asynchronous Gameplay]] with all the requirements and possibilities on gameplay actions that this can have. [[Private Game Spaces]] strengthens this since it limits the amount of interaction possible between the players. While the [[Freedom of Choice]] to play may lessen the feeling of having to play these games, [[Construction]] and other forms of [[Creative Control]] (up to making the worlds [[Player Constructed Worlds]]) can increase the wish to play them since the creations continue to exist after the players' play sessions end. Although games with [[Persistent Game Worlds]] may easily have enough skill requirements to support [[Gameplay Mastery]] and can let players play long enough to develop it, this ability to train may make it difficult to provide [[Higher-Level Closures as Gameplay Progresses]] for these players without resolving to [[Red Queen Dilemmas]]. This can to some extent be countered by [[Grinding]] but risks making players lose a sense of [[Value of Effort]]. MUDs such as [[DragonMud]] and [[Kingdoms]] introduces [[Construction]] and other forms of [[Creative Control]] to these expert players to provide [[Varied Gameplay]] and thereby other types of possible closures. Other types of [[Varied Gameplay]] can be introduced by [[Dedicated Game Facilitators]] through [[Expansions]] or [[Evolving Rule Sets]] for similar reasons.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Existing independently of players' play sessions is rather pointless if players need to synchronize when they should all interact with the [[Persistent Game Worlds]]. For this reason, use of the pattern implies&amp;#160; supporting [[Late Arriving Players]] and [[Drop-In/Drop-Out]] gameplay. This also makes [[Persistent Game Worlds]] partly support [[Asynchronous Gameplay]] with all the requirements and possibilities on gameplay actions that this can have. [[Private Game Spaces]] strengthens this since it limits the amount of interaction possible between the players. While the [[Freedom of Choice]] to play may lessen the feeling of having to play these games, [[Construction]] and other forms of [[Creative Control]] (up to making the worlds [[Player Constructed Worlds]]) can increase the wish to play them since the creations continue to exist after the players' play sessions end&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;; that is, they can provide players with a [[Value of Effort]] sensation&lt;/ins&gt;. Although games with [[Persistent Game Worlds]] may easily have enough skill requirements to support [[Gameplay Mastery]] and can let players play long enough to develop it, this ability to train may make it difficult to provide [[Higher-Level Closures as Gameplay Progresses]] for these players without resolving to [[Red Queen Dilemmas]]. This can to some extent be countered by [[Grinding]] but risks making players lose a sense of [[Value of Effort]]. MUDs such as [[DragonMud]] and [[Kingdoms]] introduces [[Construction]] and other forms of [[Creative Control]] to these expert players to provide [[Varied Gameplay]] and thereby other types of possible closures. Other types of [[Varied Gameplay]] can be introduced by [[Dedicated Game Facilitators]] through [[Expansions]] or [[Evolving Rule Sets]] for similar reasons.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Nearly all [[Multiplayer Games]] have some possibility for [[Social Interaction]] but [[Persistent Game Worlds]] let these interaction develop over time. This allows for formalized structures such as [[Guilds]] to appear if supported, as well as informal ones such as [[Game-Based Social Statuses]] and [[Internal Rivalry]]. These various forms of [[Social Interaction]] may often be the main source why games with [[Persistent Game Worlds]] have [[Encouraged Return Visits]] - this can be increased by design options such as [[Altruistic Actions]], [[Delayed Effects]], [[Development Time]], [[Events Timed to the Real World]], and [[Delayed Reciprocity]]. [[Encouraged Return Visits]] can also be constructed from [[Ephemeral Events]] but only if players are aware of them, e.g. through [[Extra-Game Broadcasting]] or by being seasonal.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Nearly all [[Multiplayer Games]] have some possibility for [[Social Interaction]] but [[Persistent Game Worlds]] let these interaction develop over time. This allows for formalized structures such as [[Guilds]] to appear if supported, as well as informal ones such as [[Game-Based Social Statuses]] and [[Internal Rivalry]]. These various forms of [[Social Interaction]] may often be the main source why games with [[Persistent Game Worlds]] have [[Encouraged Return Visits]] - this can be increased by design options such as [[Altruistic Actions]], [[Delayed Effects]], [[Development Time]], [[Events Timed to the Real World]], and [[Delayed Reciprocity]]. [[Encouraged Return Visits]] can also be constructed from [[Ephemeral Events]] but only if players are aware of them, e.g. through [[Extra-Game Broadcasting]] or by being seasonal.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Staffan Björk</name></author>	</entry>

	<entry>
		<id>http://virt10.itu.chalmers.se/index.php?title=Persistent_Game_Worlds&amp;diff=24271&amp;oldid=prev</id>
		<title>Staffan Björk: /* Relations */</title>
		<link rel="alternate" type="text/html" href="http://virt10.itu.chalmers.se/index.php?title=Persistent_Game_Worlds&amp;diff=24271&amp;oldid=prev"/>
				<updated>2015-11-23T10:36:17Z</updated>
		
		<summary type="html">&lt;p&gt;‎&lt;span dir=&quot;auto&quot;&gt;&lt;span class=&quot;autocomment&quot;&gt;Relations&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;
&lt;table class='diff diff-contentalign-left'&gt;
				&lt;col class='diff-marker' /&gt;
				&lt;col class='diff-content' /&gt;
				&lt;col class='diff-marker' /&gt;
				&lt;col class='diff-content' /&gt;
				&lt;tr style='vertical-align: top;' lang='en'&gt;
				&lt;td colspan='2' style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan='2' style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 10:36, 23 November 2015&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l62&quot; &gt;Line 62:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 62:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==== with [[Character Development]] or [[Player-Planned Development]] ====&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==== with [[Character Development]] or [[Player-Planned Development]] ====&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Investments]], [[Value of Effort]]&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Investments]], [[Value of Effort]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;==== with [[Construction]] ====&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;[[Value of Effort]]&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==== with [[Construction]] or [[Creative Control]] ====&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==== with [[Construction]] or [[Creative Control]] ====&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Staffan Björk</name></author>	</entry>

	<entry>
		<id>http://virt10.itu.chalmers.se/index.php?title=Persistent_Game_Worlds&amp;diff=23246&amp;oldid=prev</id>
		<title>Staffan Björk at 07:58, 8 August 2015</title>
		<link rel="alternate" type="text/html" href="http://virt10.itu.chalmers.se/index.php?title=Persistent_Game_Worlds&amp;diff=23246&amp;oldid=prev"/>
				<updated>2015-08-08T07:58:37Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table class='diff diff-contentalign-left'&gt;
				&lt;col class='diff-marker' /&gt;
				&lt;col class='diff-content' /&gt;
				&lt;col class='diff-marker' /&gt;
				&lt;col class='diff-content' /&gt;
				&lt;tr style='vertical-align: top;' lang='en'&gt;
				&lt;td colspan='2' style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan='2' style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 07:58, 8 August 2015&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l19&quot; &gt;Line 19:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 19:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;One typical requirement of [[Persistent Game Worlds]] is to keep track of [[Characters]] and [[Game Items]], but not all [[Game Items]] need to be persistent (e.g. [[Power-Ups]]). For [[Tick-Based Games]] this means updating them whether or not players interact with the game system between ticks. This may include activating [[Resource Generators]] and [[Spawn Points]] but this may also require other functions to avoid creating too many instances or to [[Encouraged Return Visits|Encourage Return Visits]] more frequently. The latter can for example be to have [[Budgeted Action Points]] that are [[Regenerating Resources]] which replenish over time. The handling of [[Resources|Resource]] flow needs to be handled for other purposes as well, including balancing the value of the various kinds of [[Resources]] against each other and ensuring that there are not too little of any type. This means considering overall how [[Producers]] and [[Consumers]] can interact in [[Producer-Consumer]] chains to create [[Emergent Gameplay]], and how specific issues such as [[Spawning]] and [[Crafting]] should be handled. One solution is to try and create [[Closed Economies]] (which was tried for [[Ultima Online]] but didn't find a stable equilibrium) or a [[Faucet/Drain]] model (e.g. [[World of Warcraft]] or [[FarmVille]]). In general, [[Persistent Game Worlds]] need to have all [[Resources]] as [[Renewable Resources|Renewable]] ones rather than [[Non-Renewable Resources|Non-Renewable]] ones.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;One typical requirement of [[Persistent Game Worlds]] is to keep track of [[Characters]] and [[Game Items]], but not all [[Game Items]] need to be persistent (e.g. [[Power-Ups]]). For [[Tick-Based Games]] this means updating them whether or not players interact with the game system between ticks. This may include activating [[Resource Generators]] and [[Spawn Points]] but this may also require other functions to avoid creating too many instances or to [[Encouraged Return Visits|Encourage Return Visits]] more frequently. The latter can for example be to have [[Budgeted Action Points]] that are [[Regenerating Resources]] which replenish over time. The handling of [[Resources|Resource]] flow needs to be handled for other purposes as well, including balancing the value of the various kinds of [[Resources]] against each other and ensuring that there are not too little of any type. This means considering overall how [[Producers]] and [[Consumers]] can interact in [[Producer-Consumer]] chains to create [[Emergent Gameplay]], and how specific issues such as [[Spawning]] and [[Crafting]] should be handled. One solution is to try and create [[Closed Economies]] (which was tried for [[Ultima Online]] but didn't find a stable equilibrium) or a [[Faucet/Drain]] model (e.g. [[World of Warcraft]] or [[FarmVille]]). In general, [[Persistent Game Worlds]] need to have all [[Resources]] as [[Renewable Resources|Renewable]] ones rather than [[Non-Renewable Resources|Non-Renewable]] ones.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Existing independently of players' play sessions is rather pointless if players need to synchronize when they should all interact with the [[Persistent Game Worlds]]. For this reason, use of the pattern implies&amp;#160; supporting [[Late Arriving Players]] and [[Drop-In/Drop-Out]] gameplay. This also makes [[Persistent Game Worlds]] partly support [[Asynchronous Gameplay]] with all the requirements and possibilities on gameplay actions that this can have. [[Private Game Spaces]] strengthens this since it limits the amount of interaction possible between the players. While the [[Freedom of Choice]] to play may lessen the feeling of having to play these games, [[Construction]] and other forms of [[Creative Control]] (up to making the worlds [[Player Constructed Worlds]]) can increase the wish to play them since the creations continue to exist after the players' play sessions end. Although games with [[Persistent Game Worlds]] may easily have enough skill requirements to support [[&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;Game &lt;/del&gt;Mastery]] and can let players play long enough to develop it, this ability to train may make it difficult to provide [[Higher-Level Closures as Gameplay Progresses]] for these players without resolving to [[Red Queen Dilemmas]]. This can to some extent be countered by [[Grinding]] but risks making players lose a sense of [[Value of Effort]]. MUDs such as [[DragonMud]] and [[Kingdoms]] introduces [[Construction]] and other forms of [[Creative Control]] to these expert players to provide [[Varied Gameplay]] and thereby other types of possible closures. Other types of [[Varied Gameplay]] can be introduced by [[Dedicated Game Facilitators]] through [[Expansions]] or [[Evolving Rule Sets]] for similar reasons.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Existing independently of players' play sessions is rather pointless if players need to synchronize when they should all interact with the [[Persistent Game Worlds]]. For this reason, use of the pattern implies&amp;#160; supporting [[Late Arriving Players]] and [[Drop-In/Drop-Out]] gameplay. This also makes [[Persistent Game Worlds]] partly support [[Asynchronous Gameplay]] with all the requirements and possibilities on gameplay actions that this can have. [[Private Game Spaces]] strengthens this since it limits the amount of interaction possible between the players. While the [[Freedom of Choice]] to play may lessen the feeling of having to play these games, [[Construction]] and other forms of [[Creative Control]] (up to making the worlds [[Player Constructed Worlds]]) can increase the wish to play them since the creations continue to exist after the players' play sessions end. Although games with [[Persistent Game Worlds]] may easily have enough skill requirements to support [[&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;Gameplay &lt;/ins&gt;Mastery]] and can let players play long enough to develop it, this ability to train may make it difficult to provide [[Higher-Level Closures as Gameplay Progresses]] for these players without resolving to [[Red Queen Dilemmas]]. This can to some extent be countered by [[Grinding]] but risks making players lose a sense of [[Value of Effort]]. MUDs such as [[DragonMud]] and [[Kingdoms]] introduces [[Construction]] and other forms of [[Creative Control]] to these expert players to provide [[Varied Gameplay]] and thereby other types of possible closures. Other types of [[Varied Gameplay]] can be introduced by [[Dedicated Game Facilitators]] through [[Expansions]] or [[Evolving Rule Sets]] for similar reasons.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Nearly all [[Multiplayer Games]] have some possibility for [[Social Interaction]] but [[Persistent Game Worlds]] let these interaction develop over time. This allows for formalized structures such as [[Guilds]] to appear if supported, as well as informal ones such as [[Game-Based Social Statuses]] and [[Internal Rivalry]]. These various forms of [[Social Interaction]] may often be the main source why games with [[Persistent Game Worlds]] have [[Encouraged Return Visits]] - this can be increased by design options such as [[Altruistic Actions]], [[Delayed Effects]], [[Development Time]], [[Events Timed to the Real World]], and [[Delayed Reciprocity]]. [[Encouraged Return Visits]] can also be constructed from [[Ephemeral Events]] but only if players are aware of them, e.g. through [[Extra-Game Broadcasting]] or by being seasonal.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Nearly all [[Multiplayer Games]] have some possibility for [[Social Interaction]] but [[Persistent Game Worlds]] let these interaction develop over time. This allows for formalized structures such as [[Guilds]] to appear if supported, as well as informal ones such as [[Game-Based Social Statuses]] and [[Internal Rivalry]]. These various forms of [[Social Interaction]] may often be the main source why games with [[Persistent Game Worlds]] have [[Encouraged Return Visits]] - this can be increased by design options such as [[Altruistic Actions]], [[Delayed Effects]], [[Development Time]], [[Events Timed to the Real World]], and [[Delayed Reciprocity]]. [[Encouraged Return Visits]] can also be constructed from [[Ephemeral Events]] but only if players are aware of them, e.g. through [[Extra-Game Broadcasting]] or by being seasonal.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Staffan Björk</name></author>	</entry>

	<entry>
		<id>http://virt10.itu.chalmers.se/index.php?title=Persistent_Game_Worlds&amp;diff=22236&amp;oldid=prev</id>
		<title>Staffan Björk at 15:26, 27 July 2015</title>
		<link rel="alternate" type="text/html" href="http://virt10.itu.chalmers.se/index.php?title=Persistent_Game_Worlds&amp;diff=22236&amp;oldid=prev"/>
				<updated>2015-07-27T15:26:00Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table class='diff diff-contentalign-left'&gt;
				&lt;col class='diff-marker' /&gt;
				&lt;col class='diff-content' /&gt;
				&lt;col class='diff-marker' /&gt;
				&lt;col class='diff-content' /&gt;
				&lt;tr style='vertical-align: top;' lang='en'&gt;
				&lt;td colspan='2' style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan='2' style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 15:26, 27 July 2015&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l94&quot; &gt;Line 94:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 94:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;=== Potentially Conflicting With ===&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;=== Potentially Conflicting With ===&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;[[Higher-Level Closures as Gameplay Progresses]], &lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Interruptibility]], &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Interruptibility]], &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Non-Renewable Resources]], &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Non-Renewable Resources]], &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Staffan Björk</name></author>	</entry>

	<entry>
		<id>http://virt10.itu.chalmers.se/index.php?title=Persistent_Game_Worlds&amp;diff=21764&amp;oldid=prev</id>
		<title>Staffan Björk: /* Can Modulate */</title>
		<link rel="alternate" type="text/html" href="http://virt10.itu.chalmers.se/index.php?title=Persistent_Game_Worlds&amp;diff=21764&amp;oldid=prev"/>
				<updated>2015-07-18T15:07:18Z</updated>
		
		<summary type="html">&lt;p&gt;‎&lt;span dir=&quot;auto&quot;&gt;&lt;span class=&quot;autocomment&quot;&gt;Can Modulate&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;
&lt;table class='diff diff-contentalign-left'&gt;
				&lt;col class='diff-marker' /&gt;
				&lt;col class='diff-content' /&gt;
				&lt;col class='diff-marker' /&gt;
				&lt;col class='diff-content' /&gt;
				&lt;tr style='vertical-align: top;' lang='en'&gt;
				&lt;td colspan='2' style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan='2' style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 15:07, 18 July 2015&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l75&quot; &gt;Line 75:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 75:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;=== Can Modulate ===&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;=== Can Modulate ===&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Characters]], [[Character Development]], [[Factions]], [[Game Items]], [[Game Worlds]], [[Massively Multiplayer Online Games]], [[Multiplayer Games]], [[Player-Planned Development]], [[Roleplaying]], [[Resource Generators]], [[Spawn Points]], [[Tick-Based Games]]&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Characters]], [[Character Development]], [[Factions]], [[Game Items]], [[Game Worlds]], [[Massively Multiplayer Online Games]], [[Multiplayer Games]], [[Player-Planned Development]], [[Roleplaying]], [[Resource Generators]], [[Spawn Points]], [[Tick-Based Games]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&lt;/del&gt;&lt;/div&gt;&lt;/td&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;[[Massively Single-Player Online Games]] that are also [[Tick-Based Games]] or support [[Visits]]&lt;/del&gt;&lt;/div&gt;&lt;/td&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;=== Can Be Instantiated By ===&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;=== Can Be Instantiated By ===&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Staffan Björk</name></author>	</entry>

	<entry>
		<id>http://virt10.itu.chalmers.se/index.php?title=Persistent_Game_Worlds&amp;diff=20672&amp;oldid=prev</id>
		<title>Staffan Björk at 08:31, 18 January 2015</title>
		<link rel="alternate" type="text/html" href="http://virt10.itu.chalmers.se/index.php?title=Persistent_Game_Worlds&amp;diff=20672&amp;oldid=prev"/>
				<updated>2015-01-18T08:31:29Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table class='diff diff-contentalign-left'&gt;
				&lt;col class='diff-marker' /&gt;
				&lt;col class='diff-content' /&gt;
				&lt;col class='diff-marker' /&gt;
				&lt;col class='diff-content' /&gt;
				&lt;tr style='vertical-align: top;' lang='en'&gt;
				&lt;td colspan='2' style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan='2' style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 08:31, 18 January 2015&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l84&quot; &gt;Line 84:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 84:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;=== Can Be Modulated By ===&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;=== Can Be Modulated By ===&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Closed Economies]], [[Construction]], [[Consumers]], [[Crafting]], [[Creative Control]], [[Drop-In/Drop-Out]], [[Encouraged Return Visits]], [[Ephemeral Events]], [[Expansions]], [[Faucet/Drain]], [[Grinding]], [[Guilds]], [[Instances]], [[Never Ending Stories]], [[Late Arriving Players]], [[Persistent Game World Changes]], [[Player Constructed Worlds]], &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Closed Economies]], [[Construction]], [[Consumers]], &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Crafting]], [[Creative Control]], [[Drop-In/Drop-Out]], [[Encouraged Return Visits]], [[Ephemeral Events]], &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Expansions]], [[Faucet/Drain]], [[Grinding]], [[Guilds]], [[Instances]], [[Never Ending Stories]], [[Late Arriving Players]], [[Persistent Game World Changes]], [[Player Constructed Worlds]], &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Predetermined Story Structures]], &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Predetermined Story Structures]], &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Private Game Spaces]], [[Producers]], [[Producer-Consumer]], [[Purchasable Game Advantages]], [[Quests]], &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Private Game Spaces]], [[Producers]], [[Producer-Consumer]], [[Purchasable Game Advantages]], [[Quests]], &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Staffan Björk</name></author>	</entry>

	<entry>
		<id>http://virt10.itu.chalmers.se/index.php?title=Persistent_Game_Worlds&amp;diff=18592&amp;oldid=prev</id>
		<title>Staffan Björk at 11:05, 29 July 2014</title>
		<link rel="alternate" type="text/html" href="http://virt10.itu.chalmers.se/index.php?title=Persistent_Game_Worlds&amp;diff=18592&amp;oldid=prev"/>
				<updated>2014-07-29T11:05:06Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table class='diff diff-contentalign-left'&gt;
				&lt;col class='diff-marker' /&gt;
				&lt;col class='diff-content' /&gt;
				&lt;col class='diff-marker' /&gt;
				&lt;col class='diff-content' /&gt;
				&lt;tr style='vertical-align: top;' lang='en'&gt;
				&lt;td colspan='2' style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan='2' style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 11:05, 29 July 2014&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l84&quot; &gt;Line 84:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 84:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;=== Can Be Modulated By ===&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;=== Can Be Modulated By ===&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Closed Economies]], [[Construction]], [[Consumers]], [[Crafting]], [[Creative Control]], [[Drop-In/Drop-Out]], [[Encouraged Return Visits]], [[Ephemeral Events]], [[Expansions]], [[Faucet/Drain]], [[Grinding]], [[Guilds]], [[Instances]], [[Never Ending Stories]], [[Late Arriving Players]], [[Persistent Game World Changes]], [[Player Constructed Worlds]], [[Predetermined Story Structures]], [[Private Game Spaces]], [[Producers]], [[Producer-Consumer]], [[Purchasable Game Advantages]], [[Quests]], &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Closed Economies]], [[Construction]], [[Consumers]], [[Crafting]], [[Creative Control]], [[Drop-In/Drop-Out]], [[Encouraged Return Visits]], [[Ephemeral Events]], [[Expansions]], [[Faucet/Drain]], [[Grinding]], [[Guilds]], [[Instances]], [[Never Ending Stories]], [[Late Arriving Players]], [[Persistent Game World Changes]], [[Player Constructed Worlds]], &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Predetermined Story Structures]], &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Private Game Spaces]], [[Producers]], [[Producer-Consumer]], [[Purchasable Game Advantages]], [[Quests]], &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Regenerating Resources]], &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Regenerating Resources]], &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Renewable Resources]], [[Roleplaying]], [[Spawning]], [[Storytelling]]&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Renewable Resources]], [[Roleplaying]], [[Spawning]], [[Storytelling]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Staffan Björk</name></author>	</entry>

	<entry>
		<id>http://virt10.itu.chalmers.se/index.php?title=Persistent_Game_Worlds&amp;diff=17534&amp;oldid=prev</id>
		<title>Staffan Björk at 06:44, 27 June 2014</title>
		<link rel="alternate" type="text/html" href="http://virt10.itu.chalmers.se/index.php?title=Persistent_Game_Worlds&amp;diff=17534&amp;oldid=prev"/>
				<updated>2014-06-27T06:44:04Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table class='diff diff-contentalign-left'&gt;
				&lt;col class='diff-marker' /&gt;
				&lt;col class='diff-content' /&gt;
				&lt;col class='diff-marker' /&gt;
				&lt;col class='diff-content' /&gt;
				&lt;tr style='vertical-align: top;' lang='en'&gt;
				&lt;td colspan='2' style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan='2' style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 06:44, 27 June 2014&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l15&quot; &gt;Line 15:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 15:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;== Using the pattern ==&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;== Using the pattern ==&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Persistent Game Worlds]] are basically [[Game Worlds]] that have [[Dedicated Game Facilitators]] maintaining them so they are available when players wish to enter them. This is most easily done by computer &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;programs &lt;/del&gt;but human [[Game Masters]] can also provide this service, although the accessibility may be more restricted and this adds [[Excise]] for them. The latter is the norm in tabletop [[Roleplaying]] games such as [[Call of Cthulhu]] and [[Hârnmaster]] although players often help with some of the task involved. [[Persistent Game Worlds]] make most sense for [[Multiplayer Games]], especially [[Massively Multiplayer Online Games|Massively Multiplayer ones]], but are also needed for [[Massively Single-Player Online Games]] that are [[Tick-Based Games|Tick-Based]] or support [[Visits]].&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Persistent Game Worlds]] are basically [[Game Worlds]] that have [[Dedicated Game Facilitators]] maintaining them so they are available when players wish to enter them. This is most easily done by computer &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;[[Game Servers]] &lt;/ins&gt;but human [[Game Masters]] can also provide this service, although the accessibility may be more restricted and this adds [[Excise]] for them. The latter is the norm in tabletop [[Roleplaying]] games such as [[Call of Cthulhu]] and [[Hârnmaster]] although players often help with some of the task involved. [[Persistent Game Worlds]] make most sense for [[Multiplayer Games]], especially [[Massively Multiplayer Online Games|Massively Multiplayer ones]], but are also needed for [[Massively Single-Player Online Games]] that are [[Tick-Based Games|Tick-Based]] or support [[Visits]].&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;One typical requirement of [[Persistent Game Worlds]] is to keep track of [[Characters]] and [[Game Items]], but not all [[Game Items]] need to be persistent (e.g. [[Power-Ups]]). For [[Tick-Based Games]] this means updating them whether or not players interact with the game system between ticks. This may include activating [[Resource Generators]] and [[Spawn Points]] but this may also require other functions to avoid creating too many instances or to [[Encouraged Return Visits|Encourage Return Visits]] more frequently. The latter can for example be to have [[Budgeted Action Points]] that are [[Regenerating Resources]] which replenish over time. The handling of [[Resources|Resource]] flow needs to be handled for other purposes as well, including balancing the value of the various kinds of [[Resources]] against each other and ensuring that there are not too little of any type. This means considering overall how [[Producers]] and [[Consumers]] can interact in [[Producer-Consumer]] chains to create [[Emergent Gameplay]], and how specific issues such as [[Spawning]] and [[Crafting]] should be handled. One solution is to try and create [[Closed Economies]] (which was tried for [[Ultima Online]] but didn't find a stable equilibrium) or a [[Faucet/Drain]] model (e.g. [[World of Warcraft]] or [[FarmVille]]). In general, [[Persistent Game Worlds]] need to have all [[Resources]] as [[Renewable Resources|Renewable]] ones rather than [[Non-Renewable Resources|Non-Renewable]] ones.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;One typical requirement of [[Persistent Game Worlds]] is to keep track of [[Characters]] and [[Game Items]], but not all [[Game Items]] need to be persistent (e.g. [[Power-Ups]]). For [[Tick-Based Games]] this means updating them whether or not players interact with the game system between ticks. This may include activating [[Resource Generators]] and [[Spawn Points]] but this may also require other functions to avoid creating too many instances or to [[Encouraged Return Visits|Encourage Return Visits]] more frequently. The latter can for example be to have [[Budgeted Action Points]] that are [[Regenerating Resources]] which replenish over time. The handling of [[Resources|Resource]] flow needs to be handled for other purposes as well, including balancing the value of the various kinds of [[Resources]] against each other and ensuring that there are not too little of any type. This means considering overall how [[Producers]] and [[Consumers]] can interact in [[Producer-Consumer]] chains to create [[Emergent Gameplay]], and how specific issues such as [[Spawning]] and [[Crafting]] should be handled. One solution is to try and create [[Closed Economies]] (which was tried for [[Ultima Online]] but didn't find a stable equilibrium) or a [[Faucet/Drain]] model (e.g. [[World of Warcraft]] or [[FarmVille]]). In general, [[Persistent Game Worlds]] need to have all [[Resources]] as [[Renewable Resources|Renewable]] ones rather than [[Non-Renewable Resources|Non-Renewable]] ones.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l79&quot; &gt;Line 79:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 79:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;=== Can Be Instantiated By ===&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;=== Can Be Instantiated By ===&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Dedicated Game Facilitators]], [[Game Masters]]&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Dedicated Game Facilitators]], &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Game Masters&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;]],&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;[[Game Servers&lt;/ins&gt;]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;=== Can Be Modulated By ===&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;=== Can Be Modulated By ===&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Staffan Björk</name></author>	</entry>

	<entry>
		<id>http://virt10.itu.chalmers.se/index.php?title=Persistent_Game_Worlds&amp;diff=17110&amp;oldid=prev</id>
		<title>Staffan Björk at 08:13, 1 November 2012</title>
		<link rel="alternate" type="text/html" href="http://virt10.itu.chalmers.se/index.php?title=Persistent_Game_Worlds&amp;diff=17110&amp;oldid=prev"/>
				<updated>2012-11-01T08:13:24Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table class='diff diff-contentalign-left'&gt;
				&lt;col class='diff-marker' /&gt;
				&lt;col class='diff-content' /&gt;
				&lt;col class='diff-marker' /&gt;
				&lt;col class='diff-content' /&gt;
				&lt;tr style='vertical-align: top;' lang='en'&gt;
				&lt;td colspan='2' style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan='2' style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 08:13, 1 November 2012&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l21&quot; &gt;Line 21:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 21:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Existing independently of players' play sessions is rather pointless if players need to synchronize when they should all interact with the [[Persistent Game Worlds]]. For this reason, use of the pattern implies&amp;#160; supporting [[Late Arriving Players]] and [[Drop-In/Drop-Out]] gameplay. This also makes [[Persistent Game Worlds]] partly support [[Asynchronous Gameplay]] with all the requirements and possibilities on gameplay actions that this can have. [[Private Game Spaces]] strengthens this since it limits the amount of interaction possible between the players. While the [[Freedom of Choice]] to play may lessen the feeling of having to play these games, [[Construction]] and other forms of [[Creative Control]] (up to making the worlds [[Player Constructed Worlds]]) can increase the wish to play them since the creations continue to exist after the players' play sessions end. Although games with [[Persistent Game Worlds]] may easily have enough skill requirements to support [[Game Mastery]] and can let players play long enough to develop it, this ability to train may make it difficult to provide [[Higher-Level Closures as Gameplay Progresses]] for these players without resolving to [[Red Queen Dilemmas]]. This can to some extent be countered by [[Grinding]] but risks making players lose a sense of [[Value of Effort]]. MUDs such as [[DragonMud]] and [[Kingdoms]] introduces [[Construction]] and other forms of [[Creative Control]] to these expert players to provide [[Varied Gameplay]] and thereby other types of possible closures. Other types of [[Varied Gameplay]] can be introduced by [[Dedicated Game Facilitators]] through [[Expansions]] or [[Evolving Rule Sets]] for similar reasons.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Existing independently of players' play sessions is rather pointless if players need to synchronize when they should all interact with the [[Persistent Game Worlds]]. For this reason, use of the pattern implies&amp;#160; supporting [[Late Arriving Players]] and [[Drop-In/Drop-Out]] gameplay. This also makes [[Persistent Game Worlds]] partly support [[Asynchronous Gameplay]] with all the requirements and possibilities on gameplay actions that this can have. [[Private Game Spaces]] strengthens this since it limits the amount of interaction possible between the players. While the [[Freedom of Choice]] to play may lessen the feeling of having to play these games, [[Construction]] and other forms of [[Creative Control]] (up to making the worlds [[Player Constructed Worlds]]) can increase the wish to play them since the creations continue to exist after the players' play sessions end. Although games with [[Persistent Game Worlds]] may easily have enough skill requirements to support [[Game Mastery]] and can let players play long enough to develop it, this ability to train may make it difficult to provide [[Higher-Level Closures as Gameplay Progresses]] for these players without resolving to [[Red Queen Dilemmas]]. This can to some extent be countered by [[Grinding]] but risks making players lose a sense of [[Value of Effort]]. MUDs such as [[DragonMud]] and [[Kingdoms]] introduces [[Construction]] and other forms of [[Creative Control]] to these expert players to provide [[Varied Gameplay]] and thereby other types of possible closures. Other types of [[Varied Gameplay]] can be introduced by [[Dedicated Game Facilitators]] through [[Expansions]] or [[Evolving Rule Sets]] for similar reasons.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Nearly all [[Multiplayer Games]] have some possibility for [[Social Interaction]] but [[Persistent Game Worlds]] let these interaction develop over time. This allows for formalized structures such as [[Guilds]] to appear if supported, as well as informal ones such as [[Game-&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;Induced Player &lt;/del&gt;Social &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;Status&lt;/del&gt;]] and [[Internal Rivalry]]. These various forms of [[Social Interaction]] may often be the main source why games with [[Persistent Game Worlds]] have [[Encouraged Return Visits]] - this can be increased by design options such as [[Altruistic Actions]], [[Delayed Effects]], [[Development Time]], [[Events Timed to the Real World]], and [[Delayed Reciprocity]]. [[Encouraged Return Visits]] can also be constructed from [[Ephemeral Events]] but only if players are aware of them, e.g. through [[Extra-Game Broadcasting]] or by being seasonal.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Nearly all [[Multiplayer Games]] have some possibility for [[Social Interaction]] but [[Persistent Game Worlds]] let these interaction develop over time. This allows for formalized structures such as [[Guilds]] to appear if supported, as well as informal ones such as [[Game-&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;Based &lt;/ins&gt;Social &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;Statuses&lt;/ins&gt;]] and [[Internal Rivalry]]. These various forms of [[Social Interaction]] may often be the main source why games with [[Persistent Game Worlds]] have [[Encouraged Return Visits]] - this can be increased by design options such as [[Altruistic Actions]], [[Delayed Effects]], [[Development Time]], [[Events Timed to the Real World]], and [[Delayed Reciprocity]]. [[Encouraged Return Visits]] can also be constructed from [[Ephemeral Events]] but only if players are aware of them, e.g. through [[Extra-Game Broadcasting]] or by being seasonal.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Given the many aspects of [[Resources]], and possibly [[Construction]] or [[Character Development]] present in [[Persistent Game Worlds]], there are often opportunities to include [[Trading]] in the design, both in-game and as [[Extra-Game Actions]] with [[Extra-Game Consequences]].&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Given the many aspects of [[Resources]], and possibly [[Construction]] or [[Character Development]] present in [[Persistent Game Worlds]], there are often opportunities to include [[Trading]] in the design, both in-game and as [[Extra-Game Actions]] with [[Extra-Game Consequences]].&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l47&quot; &gt;Line 47:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 47:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;== Relations ==&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;== Relations ==&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;=== Can Instantiate ===&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;=== Can Instantiate ===&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Asynchronous Gameplay]], [[Emergent Gameplay]], [[Excise]], [[Extra-Game Actions]], [[Extra-Game Consequences]], [[Freedom of Choice]], [[Game-&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;Induced Player &lt;/del&gt;Social &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;Status&lt;/del&gt;]], [[Internal Rivalry]], &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Asynchronous Gameplay]], [[Emergent Gameplay]], [[Excise]], [[Extra-Game Actions]], [[Extra-Game Consequences]], [[Freedom of Choice]], &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Game-&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;Based &lt;/ins&gt;Social &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;Statuses&lt;/ins&gt;]], &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Internal Rivalry]], &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Social Interaction]], &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Social Interaction]], &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Temporal Consistency]], &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Temporal Consistency]], &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Staffan Björk</name></author>	</entry>

	<entry>
		<id>http://virt10.itu.chalmers.se/index.php?title=Persistent_Game_Worlds&amp;diff=16808&amp;oldid=prev</id>
		<title>Staffan Björk at 07:12, 8 October 2012</title>
		<link rel="alternate" type="text/html" href="http://virt10.itu.chalmers.se/index.php?title=Persistent_Game_Worlds&amp;diff=16808&amp;oldid=prev"/>
				<updated>2012-10-08T07:12:58Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table class='diff diff-contentalign-left'&gt;
				&lt;col class='diff-marker' /&gt;
				&lt;col class='diff-content' /&gt;
				&lt;col class='diff-marker' /&gt;
				&lt;col class='diff-content' /&gt;
				&lt;tr style='vertical-align: top;' lang='en'&gt;
				&lt;td colspan='2' style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan='2' style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 07:12, 8 October 2012&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l19&quot; &gt;Line 19:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 19:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;One typical requirement of [[Persistent Game Worlds]] is to keep track of [[Characters]] and [[Game Items]], but not all [[Game Items]] need to be persistent (e.g. [[Power-Ups]]). For [[Tick-Based Games]] this means updating them whether or not players interact with the game system between ticks. This may include activating [[Resource Generators]] and [[Spawn Points]] but this may also require other functions to avoid creating too many instances or to [[Encouraged Return Visits|Encourage Return Visits]] more frequently. The latter can for example be to have [[Budgeted Action Points]] that are [[Regenerating Resources]] which replenish over time. The handling of [[Resources|Resource]] flow needs to be handled for other purposes as well, including balancing the value of the various kinds of [[Resources]] against each other and ensuring that there are not too little of any type. This means considering overall how [[Producers]] and [[Consumers]] can interact in [[Producer-Consumer]] chains to create [[Emergent Gameplay]], and how specific issues such as [[Spawning]] and [[Crafting]] should be handled. One solution is to try and create [[Closed Economies]] (which was tried for [[Ultima Online]] but didn't find a stable equilibrium) or a [[Faucet/Drain]] model (e.g. [[World of Warcraft]] or [[FarmVille]]). In general, [[Persistent Game Worlds]] need to have all [[Resources]] as [[Renewable Resources|Renewable]] ones rather than [[Non-Renewable Resources|Non-Renewable]] ones.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;One typical requirement of [[Persistent Game Worlds]] is to keep track of [[Characters]] and [[Game Items]], but not all [[Game Items]] need to be persistent (e.g. [[Power-Ups]]). For [[Tick-Based Games]] this means updating them whether or not players interact with the game system between ticks. This may include activating [[Resource Generators]] and [[Spawn Points]] but this may also require other functions to avoid creating too many instances or to [[Encouraged Return Visits|Encourage Return Visits]] more frequently. The latter can for example be to have [[Budgeted Action Points]] that are [[Regenerating Resources]] which replenish over time. The handling of [[Resources|Resource]] flow needs to be handled for other purposes as well, including balancing the value of the various kinds of [[Resources]] against each other and ensuring that there are not too little of any type. This means considering overall how [[Producers]] and [[Consumers]] can interact in [[Producer-Consumer]] chains to create [[Emergent Gameplay]], and how specific issues such as [[Spawning]] and [[Crafting]] should be handled. One solution is to try and create [[Closed Economies]] (which was tried for [[Ultima Online]] but didn't find a stable equilibrium) or a [[Faucet/Drain]] model (e.g. [[World of Warcraft]] or [[FarmVille]]). In general, [[Persistent Game Worlds]] need to have all [[Resources]] as [[Renewable Resources|Renewable]] ones rather than [[Non-Renewable Resources|Non-Renewable]] ones.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Existing independently of players' play sessions is rather pointless if players need to synchronize when they should all interact with the [[Persistent Game Worlds]]. For this reason, use of the pattern implies&amp;#160; supporting [[Late Arriving Players]] and [[Drop-In/Drop-Out]] gameplay. This also makes [[Persistent Game Worlds]] partly &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;into &lt;/del&gt;[[Asynchronous &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;Games&lt;/del&gt;]] with all the requirements and possibilities on gameplay actions that this can have. [[Private Game Spaces]] strengthens this since it limits the amount of interaction possible between the players. While the [[Freedom of Choice]] to play may lessen the feeling of having to play these games, [[Construction]] and other forms of [[Creative Control]] (up to making the worlds [[Player Constructed Worlds]]) can increase the wish to play them since the creations continue to exist after the players' play sessions end. Although games with [[Persistent Game Worlds]] may easily have enough skill requirements to support [[Game Mastery]] and can let players play long enough to develop it, this ability to train may make it difficult to provide [[Higher-Level Closures as Gameplay Progresses]] for these players without resolving to [[Red Queen Dilemmas]]. This can to some extent be countered by [[Grinding]] but risks making players lose a sense of [[Value of Effort]]. MUDs such as [[DragonMud]] and [[Kingdoms]] introduces [[Construction]] and other forms of [[Creative Control]] to these expert players to provide [[Varied Gameplay]] and thereby other types of possible closures. Other types of [[Varied Gameplay]] can be introduced by [[Dedicated Game Facilitators]] through [[Expansions]] or [[Evolving Rule Sets]] for similar reasons.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Existing independently of players' play sessions is rather pointless if players need to synchronize when they should all interact with the [[Persistent Game Worlds]]. For this reason, use of the pattern implies&amp;#160; supporting [[Late Arriving Players]] and [[Drop-In/Drop-Out]] gameplay. This also makes [[Persistent Game Worlds]] partly &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;support &lt;/ins&gt;[[Asynchronous &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;Gameplay&lt;/ins&gt;]] with all the requirements and possibilities on gameplay actions that this can have. [[Private Game Spaces]] strengthens this since it limits the amount of interaction possible between the players. While the [[Freedom of Choice]] to play may lessen the feeling of having to play these games, [[Construction]] and other forms of [[Creative Control]] (up to making the worlds [[Player Constructed Worlds]]) can increase the wish to play them since the creations continue to exist after the players' play sessions end. Although games with [[Persistent Game Worlds]] may easily have enough skill requirements to support [[Game Mastery]] and can let players play long enough to develop it, this ability to train may make it difficult to provide [[Higher-Level Closures as Gameplay Progresses]] for these players without resolving to [[Red Queen Dilemmas]]. This can to some extent be countered by [[Grinding]] but risks making players lose a sense of [[Value of Effort]]. MUDs such as [[DragonMud]] and [[Kingdoms]] introduces [[Construction]] and other forms of [[Creative Control]] to these expert players to provide [[Varied Gameplay]] and thereby other types of possible closures. Other types of [[Varied Gameplay]] can be introduced by [[Dedicated Game Facilitators]] through [[Expansions]] or [[Evolving Rule Sets]] for similar reasons.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Nearly all [[Multiplayer Games]] have some possibility for [[Social Interaction]] but [[Persistent Game Worlds]] let these interaction develop over time. This allows for formalized structures such as [[Guilds]] to appear if supported, as well as informal ones such as [[Game-Induced Player Social Status]] and [[Internal Rivalry]]. These various forms of [[Social Interaction]] may often be the main source why games with [[Persistent Game Worlds]] have [[Encouraged Return Visits]] - this can be increased by design options such as [[Altruistic Actions]], [[Delayed Effects]], [[Development Time]], [[Events Timed to the Real World]], and [[Delayed Reciprocity]]. [[Encouraged Return Visits]] can also be constructed from [[Ephemeral Events]] but only if players are aware of them, e.g. through [[Extra-Game Broadcasting]] or by being seasonal.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Nearly all [[Multiplayer Games]] have some possibility for [[Social Interaction]] but [[Persistent Game Worlds]] let these interaction develop over time. This allows for formalized structures such as [[Guilds]] to appear if supported, as well as informal ones such as [[Game-Induced Player Social Status]] and [[Internal Rivalry]]. These various forms of [[Social Interaction]] may often be the main source why games with [[Persistent Game Worlds]] have [[Encouraged Return Visits]] - this can be increased by design options such as [[Altruistic Actions]], [[Delayed Effects]], [[Development Time]], [[Events Timed to the Real World]], and [[Delayed Reciprocity]]. [[Encouraged Return Visits]] can also be constructed from [[Ephemeral Events]] but only if players are aware of them, e.g. through [[Extra-Game Broadcasting]] or by being seasonal.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l47&quot; &gt;Line 47:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 47:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;== Relations ==&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;== Relations ==&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;=== Can Instantiate ===&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;=== Can Instantiate ===&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Asynchronous &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;Games&lt;/del&gt;]], [[Emergent Gameplay]], [[Excise]], [[Extra-Game Actions]], [[Extra-Game Consequences]], [[Freedom of Choice]], [[Game-Induced Player Social Status]], [[Internal Rivalry]], &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Asynchronous &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;Gameplay&lt;/ins&gt;]], [[Emergent Gameplay]], [[Excise]], [[Extra-Game Actions]], [[Extra-Game Consequences]], [[Freedom of Choice]], [[Game-Induced Player Social Status]], [[Internal Rivalry]], &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Social Interaction]], &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Social Interaction]], &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Temporal Consistency]], &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Temporal Consistency]], &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Staffan Björk</name></author>	</entry>

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