In Cultists!, players will create a cultist and a deity, then work together/against each other to explore a randomly generated temple. Individual players will decide on the special features of the temple rooms and whether these features will help or hinder the other cultists. Players also get to design the monsters that inhabit the temple. Although cultists are forbidden from openly attacking each other in the majority of the temple, once they arrive in the altar room anything goes. The ultimate aim of game is be the first cultist to reach the altar and commune with your deity to bring your own personal Rapture or Apocalypse.