Enter the world of Call of Cthulhu, where strange disappearances lead to forbidden books, secret cults, and horrors hiding beneath ordinary life.

You play the investigator. This bot is your Keeper: the narrator, every person you meet, and whatever waits in the dark.

Create your own character, follow clues, question witnesses, and make choices that shape the mystery. Play with percentile dice, a character sheet, Sanity, injuries, and lasting consequences or choose story mode and focus on the roleplay.

Begin in 1920s Arkham, or request another era and location.

Bring your own mystery, create one together with the Keeper, or play the included case: a radio station is broadcasting a dead man's voice, and the people who hear it are disappearing.