Call of Cthulhu Keeper Rulebook

You and your companions may very well decide the fate of the world.

The Keeper Rulebook, contains the core rules, background, guidance, spells, and monsters of the game. It is everything you need for Call of Cthulhu at your fingertips, and will enhance all of your games. The Keeper Rulebook is intended for use by the Keeper of Arcane Lore—the Game Master who will present the scenario to the other players.

The other players—the Investigators—will benefit hugely from a copy of the Investigator Handbook, which contains expanded rules for character creation, skills, occupations, equipment, and a primer on 1920’s New England—the signature setting of Call of Cthulhu.

Monsters, Beasts and Alien Gods!

A bestiary of mythos entities to pepper your Call of Cthulhu scenarios and campaigns. Each entry contains full rules for using that monster in the game. Whether it’s a lowly Mi-Go, a flesh-changing Deep One, or the great Cthulhu himself, you’ll find background details, stats, special rules and spells to effectively dispatch these wicked beasts upon your hapless investigators.

Tomes of Eldritch Lore

Whether at your local library, or among the forbidden bookshelves of a twisted cultist, the Keeper Rulebook provides a wellspring of books for your investigators to find. Rules for reading, researching, and discovering spells come alongside detailed entries for over 20 tomes. Every tome listed in the Keeper Rulebook can serve as the basis of its own story, and to inspire your very own cults to face off against your investigators.

Sanity

Full rules for the Sanity system that sets Call of Cthulhu apart from other horror games. The Sanity system measures each investigator’s capacity to comprehend the incomprehensible. It mechanizes the way the human brain can break upon discovering mind-bending truths we were never meant to discover. With each loss of sanity, the investigators will change, and their character will shift and grow. Sanity is the backbone of narrative character development in Call of Cthulhu.

Scenarios

Two complete scenarios, handouts and pregenerated characters allow you to jump right into the action, or kick off a new campaign.

Amidst The Ancient Trees – The investigators join a search party for a kidnapped girl, and must venture into the woods of Southwest Vermont in pursuit. What they discover is far worse than they could imagine.

Crimson Letters – The death of a professor at Miskatonic University in Arkham, Massachusetts sets off a chain of events that echo through the entire city. The investigators must solve the unexplained death of the academic before things get out of hand.