One player must always play the role of the Overseer. All remaining players must play four hero characters. If there are not enough players, a single player may control more than one hero.
Player distribution chart for number of players:
5 Players: Overseer, 4 players controlling 1 hero each
4 Players: Overseer, 2 players controlling 1 hero each, 1 player controlling 2 heroes
3 Players: Overseer, 2 players controlling 2 heroes each
2 Players: Overseer, 1 players controlling 4 heroes