A minimum of 2 players is needed to play the game. One is designated the game master and is allowed to read the solution, while all the other players must try to guess what the mystery is. The game starts with the GM reading the short riddle linked to each situation. Afterward, the players can ask the GM any yes or no questions. The GM cannot respond with anything other than yes or no, but they can refuse to answer or say that the question is irrelevant or misleading. The game contains 56 different mysteries to solve.