The "zip file" likely contains the digital handouts and scenario documents for the game, which lead to a final showdown where the players must confront the malevolent force in the basement.
The story related to (often formatted as a scenario title) refers to a modern horror investigation for the Call of Cthulhu tabletop role-playing game . It is a reimagined homage to the classic introductory adventure "The Haunting," featuring the infamous Walter Corbitt. The Core Premise 246_Corbitt_Street.zip
Before the players arrive, three detectives (Franklin, Michael, and Trevor) were hired to investigate. They discovered ties to a religious cult called the Church of Contemplation and found a moldy, incomplete version of the Necronomicon buried in the rubble of a burnt-down chapel. The "zip file" likely contains the digital handouts