['< sod > also traditional in the genre such is the eventual evident demand on players to team right up with others in order to speed progress at the optimal rate. this sometimes forces players in to change their real - world schedules successfully in order to " keep up " with the game - world. a good example of this is the need to trade items to better achieve certain goals, or teaming up successfully to kill a powerful enemy. { { citation needed | date = april 2010 } } < eod > < 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 - world. a good example of this is the apparent need to trade items to achieve certain goals, or teaming up to kill a powerful enemy. { { clarify | reason = change from citation needed | text = is it traditional? | date = 28 october 2016 } } < eod >']