Betrayal at House on the Hill

Betrayal at House on the Hill is a popular horror-themed board game where 3-6 players explore a haunted mansion, building the map as they go, until a "Haunt" event turns one player into a traitor, flipping the game from cooperative to asymmetric, one-vs-many gameplay with different win conditions for the traitor and heroes. The current version is the 3rd Edition, featuring updated art, characters, and rules for 50 different scenarios (Haunts).