Difference between revisions of "Persistent Game Worlds"

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[[Category:Staffan's current workpage]]
 
 
[[Category:Patterns]]
 
[[Category:Patterns]]
[[Category:Needs work]]
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[[Category:Diegetic Patterns]]
 
[[Category:Needs revision]]
 
[[Category:Needs revision]]
[[Category:Needs examples]]
 
 
[[Category:Needs references]]
 
[[Category:Needs references]]
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''Game worlds that exist independently of players' game and play sessions.''
 
''Game worlds that exist independently of players' game and play sessions.''
  
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=== Examples ===
 
=== Examples ===
MUDs (e.g. [[Kingdoms]] and [[DragonMud]]) and [[:Category:Massively Multiplayer Online Games|Massively Multiplayer Online Games]] (e.g. [[Ultima Online]], [[World of Warcraft]], and [[Entropia Universe]]) have complex and dynamic [[Persistent Game Worlds]] where players' game sessions with a single character can last for years. The life time of game instances for these kinds of games are mainly determined by how popular or commercially successful the games are, and these [[Persistent Game Worlds]] can even survive software generations.
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Each [[:Category:Tabletop Roleplaying Games|Tabletop Roleplaying Game]] (e.g. [[Call of Cthulhu]] and [[Hârnmaster]]) spawn many different [[Persistent Game Worlds]] as game masters start campaigns. These game world can easily survive changes in player composition and even changes in whom does that game mastering.
 +
 
 +
MUDs (e.g. [[Kingdoms]] and [[DragonMud]]) and [[:Category:Massively Multiplayer Online Games|Massively Multiplayer Online Games]] (e.g. [[Ultima Online]], [[World of Warcraft]], and [[Entropia Universe]]) have complex and dynamic [[Persistent Game Worlds]] where players' game sessions with a single character can last for years. [[Minecraft]] servers supporting several players can be created with similar properties. Similarly, Massively Single-Player Online Games such as [[FarmVille]] continue updating for all players regardless of which players are playing. The life time of game instances for these kinds of games are mainly determined by how popular or commercially successful the games are, and these [[Persistent Game Worlds]] can even survive software generations.
 +
 
 +
[[:Category:Alternate Reality Games|Alternate Reality Games]] such as [[Prosopopeia]] and [[Conspiracy for Good]] hide in the real world and thus makes it part of them. This of course means that these parts continue to exist independent of game and play sessions.
  
 
== Using the pattern ==
 
== Using the pattern ==
[[Dedicated Game Facilitators]]
+
[[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 [[Game Servers]] 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]].
  
[[Game Worlds]]
+
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.
  
[[Private Game Spaces]]
+
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  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; that is, they can provide players with a [[Value of Effort]] sensation. 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.
[[Characters]]
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[[Freedom of Choice]]
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[[Multiplayer Games]]
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[[Late Arriving Players]]
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[[Extra-Game Consequences]]
+
[[Internal Rivalry]]
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[[Evolving Rule Sets]]
+
  
Persistent Game Worlds have game elements that stay in the world even though players start and finish their game sessions. The life time of a game instance is usually counted in months or even decades.
+
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.
  
Example: the game worlds in tabletop roleplaying games can survive changes in the player composition, even when the game master has been changed.
+
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]].
 +
For games with [[Game Items]] is may be more or less impossible to avoid [[Game Element Trading]], and through this [[Purchasable Game Advantages]] although in the latter case the game facilitators can be the sellers of the [[Game Items]].
  
Persistent Game Worlds almost always rely on Dedicated Game Facilitators to maintain the game state independently of the players, although in some cases, especially in tabletop and live-action roleplaying games, this task might be shared between the Game Master and the players.
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=== Diegetic Aspects ===
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As mentioned below in the section of narrative aspects, [[Persistent Game Worlds]] can have problems with [[Thematic Consistency]] unless using [[Never Ending Stories]].
  
The game elements of Persistent Game Worlds can have a long life time enhancing the sense of Ownership. Many current MMORPGs have recognized this fact and afford players the opportunity to own and modify even buildings and areas in the game. The sense of Ownership is heightened even more by allowing the players to personalize their own items, Avatars, and locations in the game thus giving them Creative Control over their personal game elements. Even permitting players choose their own Handles in the game increases the player commitment. More complex Construction activities can lead to Player Constructed Worlds, which is one of the strongest features of text-based MUDs.
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=== Narrative Aspects ===
 +
Games with [[Persistent Game Worlds]] cannot have fully [[Predetermined Story Structures]] but must instead rely on [[Never Ending Stories]], or accept to break the [[Thematic Consistency]] by [[Spawning]] [[Quests]] and [[Instances]] that contain small [[Predetermined Story Structures]]. Providing the content of [[Never Ending Stories]] may be left to the [[Randomness]] of [[Resource Generators]] used (arguably used in [[Minecraft]]), [[Game Masters]], or the players through giving them [[Creative Control]] for this through [[Storytelling]]. This kind of [[Storytelling]] is usually based on the players doing [[Roleplaying]] with their [[Characters]] and as the [[Storytelling]] does not have an immediate effect on the state of the [[Game Worlds]], worlds supporting this type of gameplay typically generate significant amounts of [[Extra-Game Actions]] and [[Extra-Game Consequences]].
  
One way to achieve Identification and the sense of Ownership is to provide the players with Characters represented by Avatars and base the gameplay on Character Development. The effort the players put into developing their Characters deepens the Identification and the sense of Ownership. The Characters can, in the end, feel more like a part of the players' personality than just game elements.
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Related to the developing of a narrative is if the events caused by gameplay have persist or simply get removed due to [[Spawning]]. While some games like [[Minecraft]] support the former through [[Persistent Game World Changes]] this is difficult to combine with re-occuring [[Quests]] in [[Massively Multiplayer Online Games]] like [[World of Warcraft]]. [[Player Constructed Worlds]] are also typically easy combined with [[Persistent Game World Changes]] as are games with human [[Game Masters]]. Although supporting these permanent changes pose problems with generating content these changes are at the same time often necessary for [[Creative Control]] to have a [[Value of Effort]].
  
The persistent nature of game elements that are shared by many players makes it almost impossible to have Reversability within players' game and play sessions, which usually do not even overlap, making the game an Asynchronous Game.
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== Consequences ==
 +
[[Persistent Game Worlds]] can encourage players to view [[Character Development]], and especially [[Player-Planned Development]], as [[Investments]] having a [[Value of Effort]] that they feel [[Ownership]] of, this since these can be developed over a long period of time and there is no predetermined point in time when they will stop being valuable. By doing so, the persistence of a [[Game Worlds|Game World]] may change how [[Roleplaying]] is conducted (e.g. not taking the risky chances often since the law of averages will make this a bad strategy). Examples of these kinds of attachments are common in games such as [[Ultima Online]] or [[World of Warcraft]] that have strong foci on [[Characters]], but do often spill over to [[Factions]] or what is created through [[Construction]] (examples of that latter can be found in [[FarmVille]] and multiplayer servers for [[Minecraft]]). In general, these effects are strengthen the more [[Creative Control]] players are given up to the level where the worlds are [[Player Constructed Worlds]].  
  
Persistent Game Worlds by their definition give rise to Multiplayer Games where several, sometimes even thousands, of players share the same Game World, which itself has an existence independent of the players themselves. The high level of Social Interaction that occurs in these games can over time give rise to both Social Statuses among the players and Social Organizations given some support through the game design.
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The support for [[Late Arriving Players]] and [[Drop-In/Drop-Out]] gives players a [[Freedom of Choice]] when to play games with [[Persistent Game Worlds]], especially when they contain [[Private Game Spaces]]. However, this may be countered by [[Encouraged Return Visits]]. Even if [[Persistent Game Worlds]] can provide [[Drop-In/Drop-Out]] gameplay, this does not automatically translate to a support of [[Interruptibility]] since players may be negatively affected by not participating in the game.
  
These games offer players the possibility to enter another world, and when these shared fantasies are constructed with care the Emotional Immersion and commitment from the players can be significant. Tabletop roleplaying games create these shared fantasies through Storytelling by the players and the Game Masters. The games usually have loose Narrative Structures with no definite ends, making the tales told by the players and to the players Never Ending Stories. This kind of Storytelling is usually based on the players doing Roleplaying with their Characters. As much of the Storytelling does not have an immediate effect on the state of the Game Worlds, these worlds typically generate significant Extra-Game Actions and Extra-Game Consequences.
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When the [[Investments]] players have done in [[Persistent Game Worlds]] are recognized by other players as having [[Value of Effort]] this can lead to the [[Extra-Game Actions]] of [[Purchasable Game Advantages]], that is the [[Game Element Trading]] of [[Characters]] and [[Game Items]] using real world currencies.
  
 +
Since [[Persistent Game Worlds]] need to either maintain the effects on [[Game Items]] or the [[Character Development|Development]] that [[Characters]] have had, it is impossible to have full [[Reversibility]] in [[Persistent Game Worlds]] and they typically strive to have [[Temporal Consistency]]. This also means that small effects tend to escalate over time. Because of this it may be very difficult to avoid [[Emergent Gameplay]] of some sort and possibilities for [[Crafting]], [[Abstract Player Construct Development]], or [[Character Development]] can easily lead to ruining [[Player Balance]].
  
=== Diegetic Aspects ===
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[[Persistent Game Worlds]] can initially support [[Game World Exploration]] just as well as other [[Game Worlds]], but for the same reasons as above the need for this decreased as gameplay time accumulates. This is however not the case in games that combined the pattern with either [[Evolving Rule Sets]] or [[Expansions]] (as for example [[World of Warcraft]] does).
  
=== Interface Aspects ===
+
== Relations ==
 +
=== Can Instantiate ===
 +
[[Asynchronous Gameplay]], [[Emergent Gameplay]], [[Excise]], [[Extra-Game Actions]], [[Extra-Game Consequences]], [[Freedom of Choice]],
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[[Game-Based Social Statuses]],
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[[Internal Rivalry]],
 +
[[Social Interaction]],
 +
[[Temporal Consistency]],
 +
[[Trading]],
  
=== Narrative Aspects ===
+
==== with [[Altruistic Actions]], [[Delayed Effects]], [[Delayed Reciprocity]], [[Development Time]], or [[Ephemeral Events]] ====
 +
[[Encouraged Return Visits]]
  
== Consequences ==
+
==== with [[Budgeted Action Points]] and [[Regenerating Resources]] ====
 +
[[Encouraged Return Visits]]
  
== Relations ==
+
==== with [[Character Development]] or [[Player-Planned Development]] ====
 +
[[Investments]], [[Value of Effort]]
  
=== Can Instantiate ===
+
==== with [[Construction]] ====
 +
[[Value of Effort]]
  
==== with ... ====
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==== with [[Construction]] or [[Creative Control]] ====
 +
[[Varied Gameplay]]
 +
 
 +
==== with [[Evolving Rule Sets]] or [[Expansions]] ====
 +
[[Game World Exploration]]
 +
 
 +
==== with [[Game Items]] ====
 +
[[Game Element Trading]],
 +
[[Purchasable Game Advantages]]
  
 
=== Can Modulate ===
 
=== Can Modulate ===
 +
[[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]]
  
 
=== Can Be Instantiated By ===
 
=== Can Be Instantiated By ===
 +
[[Dedicated Game Facilitators]],
 +
[[Game Masters]],
 +
[[Game Servers]]
  
 
=== Can Be Modulated By ===
 
=== Can Be Modulated By ===
 +
[[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]],
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[[Regenerating Resources]],
 +
[[Renewable Resources]], [[Roleplaying]], [[Spawning]], [[Storytelling]]
  
 
=== Possible Closure Effects ===
 
=== Possible Closure Effects ===
 +
-
  
 
=== Potentially Conflicting With ===
 
=== Potentially Conflicting With ===
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[[Higher-Level Closures as Gameplay Progresses]],
 +
[[Interruptibility]],
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[[Non-Renewable Resources]],
 +
[[Predetermined Story Structures]], [[Reversibility]],
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[[Thematic Consistency]]
 +
 +
[[Player Balance]] when [[Crafting]], [[Abstract Player Construct Development]], or [[Character Development]] exists in the game
  
 
== History ==
 
== History ==
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== Acknowledgements ==
 
== Acknowledgements ==
-
+
Peter Lönnqvist

Latest revision as of 10:37, 23 November 2015

Game worlds that exist independently of players' game and play sessions.

Through having people or servers dedicated to them, some games can have game worlds that are always available for players to enter them. This means that these Persistent Game Worlds exist independently from players' game and play sessions. This does not necessarily mean that everything that happens in them affect its future, parts of the entirety of them can be reset but this does not change that they are available continuously (with the exception for temporary server restarts).

Examples

Each Tabletop Roleplaying Game (e.g. Call of Cthulhu and Hârnmaster) spawn many different Persistent Game Worlds as game masters start campaigns. These game world can easily survive changes in player composition and even changes in whom does that game mastering.

MUDs (e.g. Kingdoms and DragonMud) and Massively Multiplayer Online Games (e.g. Ultima Online, World of Warcraft, and Entropia Universe) have complex and dynamic Persistent Game Worlds where players' game sessions with a single character can last for years. Minecraft servers supporting several players can be created with similar properties. Similarly, Massively Single-Player Online Games such as FarmVille continue updating for all players regardless of which players are playing. The life time of game instances for these kinds of games are mainly determined by how popular or commercially successful the games are, and these Persistent Game Worlds can even survive software generations.

Alternate Reality Games such as Prosopopeia and Conspiracy for Good hide in the real world and thus makes it part of them. This of course means that these parts continue to exist independent of game and play sessions.

Using the pattern

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 Game Servers 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 ones, but are also needed for Massively Single-Player Online Games that are Tick-Based or support Visits.

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 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 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 ones rather than Non-Renewable ones.

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 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; that is, they can provide players with a Value of Effort sensation. 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.

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.

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. For games with Game Items is may be more or less impossible to avoid Game Element Trading, and through this Purchasable Game Advantages although in the latter case the game facilitators can be the sellers of the Game Items.

Diegetic Aspects

As mentioned below in the section of narrative aspects, Persistent Game Worlds can have problems with Thematic Consistency unless using Never Ending Stories.

Narrative Aspects

Games with Persistent Game Worlds cannot have fully Predetermined Story Structures but must instead rely on Never Ending Stories, or accept to break the Thematic Consistency by Spawning Quests and Instances that contain small Predetermined Story Structures. Providing the content of Never Ending Stories may be left to the Randomness of Resource Generators used (arguably used in Minecraft), Game Masters, or the players through giving them Creative Control for this through Storytelling. This kind of Storytelling is usually based on the players doing Roleplaying with their Characters and as the Storytelling does not have an immediate effect on the state of the Game Worlds, worlds supporting this type of gameplay typically generate significant amounts of Extra-Game Actions and Extra-Game Consequences.

Related to the developing of a narrative is if the events caused by gameplay have persist or simply get removed due to Spawning. While some games like Minecraft support the former through Persistent Game World Changes this is difficult to combine with re-occuring Quests in Massively Multiplayer Online Games like World of Warcraft. Player Constructed Worlds are also typically easy combined with Persistent Game World Changes as are games with human Game Masters. Although supporting these permanent changes pose problems with generating content these changes are at the same time often necessary for Creative Control to have a Value of Effort.

Consequences

Persistent Game Worlds can encourage players to view Character Development, and especially Player-Planned Development, as Investments having a Value of Effort that they feel Ownership of, this since these can be developed over a long period of time and there is no predetermined point in time when they will stop being valuable. By doing so, the persistence of a Game World may change how Roleplaying is conducted (e.g. not taking the risky chances often since the law of averages will make this a bad strategy). Examples of these kinds of attachments are common in games such as Ultima Online or World of Warcraft that have strong foci on Characters, but do often spill over to Factions or what is created through Construction (examples of that latter can be found in FarmVille and multiplayer servers for Minecraft). In general, these effects are strengthen the more Creative Control players are given up to the level where the worlds are Player Constructed Worlds.

The support for Late Arriving Players and Drop-In/Drop-Out gives players a Freedom of Choice when to play games with Persistent Game Worlds, especially when they contain Private Game Spaces. However, this may be countered by Encouraged Return Visits. Even if Persistent Game Worlds can provide Drop-In/Drop-Out gameplay, this does not automatically translate to a support of Interruptibility since players may be negatively affected by not participating in the game.

When the Investments players have done in Persistent Game Worlds are recognized by other players as having Value of Effort this can lead to the Extra-Game Actions of Purchasable Game Advantages, that is the Game Element Trading of Characters and Game Items using real world currencies.

Since Persistent Game Worlds need to either maintain the effects on Game Items or the Development that Characters have had, it is impossible to have full Reversibility in Persistent Game Worlds and they typically strive to have Temporal Consistency. This also means that small effects tend to escalate over time. Because of this it may be very difficult to avoid Emergent Gameplay of some sort and possibilities for Crafting, Abstract Player Construct Development, or Character Development can easily lead to ruining Player Balance.

Persistent Game Worlds can initially support Game World Exploration just as well as other Game Worlds, but for the same reasons as above the need for this decreased as gameplay time accumulates. This is however not the case in games that combined the pattern with either Evolving Rule Sets or Expansions (as for example World of Warcraft does).

Relations

Can Instantiate

Asynchronous Gameplay, Emergent Gameplay, Excise, Extra-Game Actions, Extra-Game Consequences, Freedom of Choice, Game-Based Social Statuses, Internal Rivalry, Social Interaction, Temporal Consistency, Trading,

with Altruistic Actions, Delayed Effects, Delayed Reciprocity, Development Time, or Ephemeral Events

Encouraged Return Visits

with Budgeted Action Points and Regenerating Resources

Encouraged Return Visits

with Character Development or Player-Planned Development

Investments, Value of Effort

with Construction

Value of Effort

with Construction or Creative Control

Varied Gameplay

with Evolving Rule Sets or Expansions

Game World Exploration

with Game Items

Game Element Trading, Purchasable Game Advantages

Can Modulate

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

Can Be Instantiated By

Dedicated Game Facilitators, Game Masters, Game Servers

Can Be Modulated By

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, Regenerating Resources, Renewable Resources, Roleplaying, Spawning, Storytelling

Possible Closure Effects

-

Potentially Conflicting With

Higher-Level Closures as Gameplay Progresses, Interruptibility, Non-Renewable Resources, Predetermined Story Structures, Reversibility, Thematic Consistency

Player Balance when Crafting, Abstract Player Construct Development, or Character Development exists in the game

History

An updated version of the pattern Persistent Game Worlds that was part of the original collection in the book Patterns in Game Design[1].

References

  1. Björk, S. & Holopainen, J. (2004) Patterns in Game Design. Charles River Media. ISBN1-58450-354-8.

Acknowledgements

Peter Lönnqvist