It's a deduction game in which each player takes a secret role. There is a big variation of roles with different abilities, but the essential ones are the murderers, their spy, the cup and the victims. The game starts and the cup knows one murderer and the spy. Each day after discussion players vote to lynch one player, who is eliminated without making known his identity, and without participating for the rest of the game. After the day, during the night murderers show to the already eliminated players, who they are killing. Game ends if all murderers are killed, or if the number of murderers is the same with all the 'good' players.