Call of Cthulhu Keeper Rulebook

The Call of Cthulhu Keeper Rulebook (7th Edition) is the essential core volume for running Chaosium’s legendary horror roleplaying game. This hardcover rulebook gives Keepers everything needed to guide investigators through terrifying mysteries and cosmic horrors inspired by H.P. Lovecraft. Inside, you’ll find complete rules for handling sanity loss, supernatural monsters, forbidden magic, and ancient cults, along with two full-length scenarios to launch your campaign right away.

Key features include a detailed sanity and trauma system, a bestiary of Mythos creatures and alien gods, and in-depth lore for spells, cults, and forbidden tomes. The book also provides handouts, pre-generated characters, and expert advice for running suspenseful adventures. Whether you’re new to Call of Cthulhu or a longtime fan, the Keeper Rulebook is your definitive guide to cosmic horror at the game table. Ideal companion for the Investigator Handbook.