Mediator: Just as GMs make sure all of a game’s plots and rules work together to entertain, they must also ensure that the players themselves mesh and cooperate.Īctor: Through the GM, the cast of entire fantasy worlds takes the stage. To such ends, a GM manipulates dozens of elements, from how narrative components unfold to what rules are used and how they function in every situation. Mastermind: GMs work to keep a game’s momentum moving in directions that entertain all the players while exploring the stories and settings they desire. Host: Game Masters are the unifying force behind most of the game, not just organizing a social event but providing excitement and entertainment for those who participate.