For the most part, the ideal size for a gaming group is five, four players and a GM. This is driven by group dynamics; researchers wrote in the Harvard Business Review back in 2018 that the ideal group size for meetings is between five and eight, at least if the point of that meeting is to have a productive discussion and get things done. Roleplaying games skew to the lower end of this mostly just due to the fact that in addition to the actual ‘meeting’ of a game, there is also the need to manage that many characters, their contributions, and their stories.

Ideal doesn’t mean only, and an experienced GM can run games anywhere in that 5-8 range without too many problems, at least as long as they’re realistic about how long things will take. More and more, though, games are being written towards a specific group size, usually a smaller one. In some cases it’s obvious, like Fiasco: the number of turns in the game, and therefore the amount of time the game will take, is directly proportional to the number of people playing, and even playing with five people, the maximum number recommended by the rules, the game begins to sprawl and the story begins to sag. In other cases, the restriction comes from a clear place, but the question hangs in the air about how to subvert it. A good example of this is DIE: There are six roles, six dice. That’s how many there were in the comic, therefore that’s how many there are in the game.