Players randomly select a monster. The monster requires a certain number of elder sign tokens to "seal" or imprison it. Conversely, the monster can be "awakened" or released by a number of doom tokens.
Each player assumes a random role, each role having unique abilities.
Players take turns exploring a randomly generated room. If the player's character dies, he loses what he originally had, and the player returns to play in a different role.
Rooms are explored until either the monster is "sealed" or "awakened". Players may not "respawn" while fighting an awakened monster. The game is lost when all characters are killed, and it is won if the monster is killed.