Diegetic Consistency

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That the depiction of a game world only contain elements that are diegetically present in them.

For a game to be consistent means, first, that there are no contradictions or irregularities in the functioning of the game. For example, if the player can blow up a crate, the player should also be able to blow up all other similar crates. Another, more fundamental, layer of consistency concerns the degree to which our intuitive and natural ways of being in the real world are transformed into the metaphors used in the game itself. This means that all games have an internal logic that mimics reality or at least relates to how we understand reality through categories and relations.

This pattern is a still a stub.

Examples

Example: The Sims, one of the most popular computer games ever, takes some of the features of suburban life and blends them into a consistent totality. The play experience is intuitive, seamless, and fluid. This is partly because of a great user interface but also because the Consistent Reality Logic of The Sims is extremely well constructed. Even though the player actions do not always have a direct counterpart in the real world, the consequences are life-like and consistent.


Using the pattern

While considering Diegetic Consistency, it may be worthwhile to also consider Thematic and Temporal Consistency since these also relate to the aesthetic experiences games can provide. It may for example be more important that the diegetic elements that exist in Game Worlds behave thematically consistent to each other that that everything in the game environment is diegetically present.


While putting the responsibility on somebody else, one way of creating Diegetic Consistency is to make it the task of Game Masters to portray Game Worlds.


possibly incompatible with Multiplayer Games


A Consistent Reality Logic in a game almost always creates a stronger sense of Immersion even without having realistic audiovisual representations of the game elements. Concentrating on Consistent Reality Logic on the expense of the graphical outlook of the Game World may promote Cognitive Immersion instead of Emotional Immersion, and may be more suitable for a particular game design. For example, it is doubtful that the experience of playing computer Chess would benefit from photorealistic and animated movement of the pieces; the outcome would probably be negative regarding gameplay. A sign of Consistent Reality Logic that is combined with Emotional Immersion in games is when players can have Identification with their Enemies.

Consistent Reality Logic also helps players get started. If the actions, events, rules, and especially the Penalties of the game are intuitive and have Predictable Consequences, i. e., they resemble the basic notions of how the reality works, it is much easier to learn the controls and the rules of the game, thus supporting Smooth Learning Curves and Predictable Consequences. This, of course, does not mean that the game should simulate the reality as accurately as possible; on the contrary, games are caricatures of reality, and as such, it is in most cases detrimental to the whole gameplay to make the simulation too real.

Common ways Consistent Reality Logic is challenged include: any kind of Extra-Game Information; the use of Lives, Rewards, or Ability Losses not motivated by what caused them within the Game World; Spawning, as this has few plausible real world explanations; and Easter Eggs, which provide Extra-Game Consequences or Games within Games. Clues, Indirect Information, and Game Pauses that are not designed in such way that they function within the Alternative Reality of the game also negatively affect Consistent Reality Logic.

One of the problems with providing Diegetic Consistency in Game Worlds or Levels is related to size since thematically these should often be larger than is practically possible to design and implement. One solution, which risks breaking Thematic Consistency instead is to make use of Inaccessible Areas and [[Invisible Walls] since these can allow games to present larger Game Worlds than are actually possible to visit.

Diegetic Aspects

Interface Aspects

Narrative Aspects

Consequences

Having Diegetic Consistency is a requirement to be able to have Thematic Consistency since any Non-Diegetic Features automatically also break a theme in the presentation of Game Worlds or Levels.


The primary design challenge with creating Consistent Reality Logic is how to limit the Game World. The most common ways are to partition the Game World into Levels, to use Inaccessible Areas, and to make the world appear infinite in size by making movement off an "edge" of the Game World cause game elements to enter from the "other edge." Invisible Walls can serve the same purpose but are harder to explain within an Alternative Reality. The choice of how to limit the Game World through Consistent Reality Logic can be used to modulate how easy or difficult Game World Navigation is.

When dealing with the Consistent Reality Logic of the game, two levels of consistency have to be considered: the level of logical contradictions and irregularities between the game elements in the game and the level of how the Game World reflects the real world. The second layer is defined by carefully making the actions and their consequences and the game events consistent with both the internal logic of the game and, to some extent, with the fundamental features of the real world. As previously mentioned, this does not necessarily mean that they should simulate their real-word counterparts, but there should be some resemblance to how we as human beings act and perceive the world. For example, even though Tetris is an abstract game, the basic actions and events have their counterparts in real life. Moving and rotating objects---in this case, the falling blocks---are very fundamental actions in the real world. Changes in the game can nearly always be explained by real world equivalents: introduction of new game elements can be explained by Construction, and New Abilities can be explained through Tools or Character Development. Other changes such as Ultra-Powerful Events can be explained through Storytelling or unfolding of the Narrative Structure without breaking the reality logic, but such changes may require Downtime for players during the explanation.

The first layer of consistency, not having logical contradictions or irregularities in the game, is somewhat easier to deal with. When the basic actions, events, and game elements have been designed for a game, it is just a matter of going through these and checking that there are no outright contradictions in their behavior. For example, if some of the items can be picked up, it makes sense to make all items portable or to otherwise indicate clearly the difference between static and moveable items. Alternative Reality can also be used to mold the elements and actions according to the theme of the game.

The choice of Focus Loci easily affects the Consistent Reality Logic: Avatars and Units may maintain it while a controllable Camera or aGod's Finger likely damages it.

Relations

Alarms Player/Character Skill Composites Exaggerated Perception of Influence Avatars Units Open Destiny


Mules Private Game Spaces Gameplay Statistics Levels Game State Indicators Stimulated Planning Enemies Extra Chances Diegetically Outstanding Features Freedom of Choice Optional Rules Multiplayer Games Late Arriving Players Quick Travel Companions Actions Have Diegetically Social Consequences Detective Structure Extra-Game Consequences Gossip Power-Ups Single-Player Games Grind Achievements Game Worlds Minigames Evolving Rule Sets Persistent Game Worlds Massively Multiplayer Online Games Non-Player Help Construction Safe Havens Cooldown Alien Space Bats Big Dumb Objects Geospatial Game Widgets Environmental Effects Asymmetric Starting Conditions Loot Sets Props Warp Zones Landmarks Tools Crafting Inventories Destructible Objects Diegetically Tangible Game Items Abstract Player Constructs Territories Character Development

Can Instantiate

Thematic Consistency

with ...

Can Modulate

Can Be Instantiated By

Game Masters, Inaccessible Areas, Invisible Walls

Can Be Modulated By

Possible Closure Effects

Potentially Conflicting With

History

A rewrite of the pattern Consistent Reality Logic 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.