Persistent-State World (PSW)

There are different degrees of persistent-state world. With multiplayer online games this may refer to many players logging on and playing on different schedules. Events impacting a player directly (such as a major change in the game or how it is played) or indirectly (competitors reaching higher levels) will surely happen while some players are absent.

Other games take a more literal approach to PSW and give the game world a regular schedule of day and night or advance certain game elements based on elapsed time between gaming sessions. PSWs are intended to provide a more intensely involved experience for the gamer and encourage playing on a regular basis.