Proximity
Information is revealed or concealed depending on a player's distance to another player or location of interest.
In its simple form it acts as a hot or cold kind of pattern, where it gives information of proximity. As a game tool it could take the form of a proximity radar (visual feedback) or sonar (sound feedback), or as dowsing device (tactile feedback) etc.
Proximity can be used in order to structure the game space, especially when it concerns fixes locations. In those cases it can be seen as a pattern on which to implement exploration or fog of war. Proximity also offers way to implement variable information awareness, especially if it is used to reveal more than distance information (e.g. identity, or properties of a target).
Collecting of digital objects can be implemented through the proximity pattern. It can be used as a trigger for other events, for example awarding missions or considering puzzles solved.
Abilities related to player roles might be activated through proximity as is the case with the co-locality pattern.