['< sod > also traditional in the and genre is the eventual demand on players to not team up with others in order to progress at under the optimal rate. this sometimes forces players to change their real - world schedules in order just 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 to kill such a powerful enemy. { { citation needed | date = april 2010 } } < eod > < sod > also traditional in the the genre is the eventual demand on players to team up with others in goal order to progress at the optimal rate. this sometimes forces players to change their their real - world work 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 to kill a powerful enemy. { { clarify | reason = change from citation needed | text = is it traditional? | issue date = october 2016 } } < eod >']