['< sod > also traditional in the genre is the eventual demand on players to team up with others in order to progress at the optimal rate. this sometimes forces players to change their real - world schedules in order to " keep up " with the game - set world. a good example of how this is the need to trade items to achieve certain goals, or teaming up to kill a powerful enemy. { { citation needed | date = april 2010 } } < eod > < sod > also traditional in the genre is the eventual demand on players to temporarily team things up with others in order to progress at the optimal rate. this sometimes forces players to change their real - world days schedules in order to " keep up " success with the game - world. often a good example of this is the need to trade items to achieve certain goals, or teaming up to kill a powerful enemy. { { clarify | reason = change from citation not needed | text = is it traditional? | date = october 1st 2016 } } < class eod >']