Mysterium — Steam game overview

Stored observation / content update: 2026-10-25T20:02:52.000Z

Mysterium is a cooperative deduction game set in the 1920s in which a ghost guides a group of psychics to uncover a murderer, as well as the weapon and location of the murder, using only visual clues.

Game metrics below are stored observations; missing values are unknown.

Revenue is modelled, not confirmed sales. See the methodology and uncertainty range.