This is a card game where one of the cards, considered a 'demon' lies to you. All the other cards are harmless villagers, who are trying to help you figure out which one is the demon. Second guess everything you are told, in case it's one of the demon's lies. When you think you know which card is the demon, press the eye in the middle, and execute one of the cards. If it's the demon, you win! If it's a villager, then you lose 5 hearts. Execute two villagers, and you lose.
The game is entirely based off Uziabart's game, Demon Bluff.