['< sod > also traditional in the genre is the eventual demand on players too to team up with others in order to progress higher at the optimal rate. this sometimes forces players to change their real - world schedules in order to " keep up " with the game - world. a good example of this is the need to trade some items to achieve certain goals, or teaming things up to kill a powerful enemy. { { citation needed | date = april 2010 } } < eod > < sod > also traditional in the genre is the eventual rising 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 world schedules in order to " keep up " with the game - world. a good example of this is the need to trade items to achieve certain goals, or teaming up items to kill a powerful enemy. { { clarify | reason = change from citation when needed | code text = so is it traditional? | date = october 2016 } } < eod >']