The game has multiple episodes, and each of them has a similar structure of two acts, those being before and after you summon whatever it is you happen to be summoning. If any character dies prior to the summoning, then the game ends and you lose; once the Elder One is on the board, as long as one of you is still alive, you still have a chance to win.

The episodes are all standalone and not contingent on being played in a certain order or with the same players.