A circus with dark secrets awaits you in Mysterium Park! The former director of the park disappeared a few years ago... An investigation turned up nothing. Since that night, strange things have been happening in the circus...

Mysterium Park is a stand-alone, cooperative and simplified version of the well-known board game Mysterium: players win or lose together. Your goal is to determine the circumstances of the spirit's death. At the start of the game, players first choose a role: Ghost or Clairvoyant.

The Spirit (1 player) must guide the Clairvoyants through the investigation. He gives directions in the form of illustrated cards, which we call the Vision Cards. This is the only way the Spirit can communicate with the Psychics. Each of the Psychics (all other players) must eliminate a suspect and a location and they help each other interpret the Vision Cards that the Spirit hands them.

To win Mysterium Park, the Clairvoyants must find out who committed the murder and where the crime took place during Round 3. The Clairvoyants must first eliminate suspects (Round 1) and then locations (Round 2). If they manage to do this in the first 6 turns, they move on to Round 3. If not, everyone loses the game. If the Clairvoyants win, then the Spirit wins too. If not, all players lose.