The bigger more missions an institution has, the more games it will also have. Institutions have implicit, explicit, and perceived missions.
Additionally, Gatekeepers are essential to Institutions - without them there is no boundary between who is part of the institution and who is not (and thus, who should be expected to know and adhere to the rules of the game.) Often there is a separate gatekeeping game to start playing the institutional game. Gatekeeping games vary along two important axes.