The World’s Best Game Of Intrigue, Mystery & Horror!

The Old Ones ruled the earth aeons before the rise of humanity. Traces of their cyclopean cities can still be found on remote islands, buried amid the shifting desert sands, and in the frozen wastes of the polar extremes. Originally they came to this world from the stars. They sleep now, some deep within the earth or beneath the sea.

When the stars are right they shall again walk the earth.

Chaosium Unveiled: Inside Inside Call of Cthulhu Keeper Rulebook

Watch the unveiling video to see the book for yourself. Remember that you get the PDF when getting the physical copy.

Call of Cthulhu is the world’s best game of secrets, mysteries, and horror. 

Playing the role of steadfast investigators, you travel to strange and dangerous places, uncover foul plots, and stand against the terrors of the Cthulhu Mythos. You encounter sanity-blasting entities, monsters, and insane cultists. Within strange and forgotten tomes of lore you discover revelations that humanity was not meant to know.

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!

The Dark Young

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.

Call of Cthulhu statistics for the Dark Young

Tomes of Eldritch Lore

The Tome

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.

Tome - Cthulhu in the Necronomicon

Sanity

The Scream of 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.

Sanity Loss Example

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

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.

The Horror in Ink

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.

Downloads for this Product

 
Character Sheets
Book
Format Hardcover
Type Core Rulebook
Pages 448
Rule System/Engine Call of Cthulhu
Book
Format Hardcover
Type Core Rulebook
Pages 448
Rule System/Engine Call of Cthulhu

Write a review

Note: HTML is not translated!
    Bad           Good

Call of Cthulhu Keeper Rulebook

  • C$68.98


Available Options


Related Products

Alone Against the Dark

Alone Against the Dark

A solo play Call of Cthulhu mini campaign.No Keeper is needed as you guide yourself through the adve..

C$18.98

Dwelling

Dwelling

Wander through your haunted house at night. A role-playing game and short story for one. This i..

C$45.00

Doors to Darkness

Doors to Darkness

Five scenarios of Cthulhu Mythos terror designed for new players and keepers!What’s Inside?Doors to ..

C$43.98

Auspex

Auspex

Your world is about change, and you with your skills of divination and foresight, are the only one w..

C$25.00

Tags: Core Rulebook, Call of Cthulhu, 2024

Featured

A Fool's Errand

A Fool's Errand

Influence the gods’ calamities, explore your infinite potential and confront your own Big Oops...

C$55.00

Odyssey: Black Tales

Odyssey: Black Tales

An anti-heroic low-fantasy game of the where the Odyssey is a lie told by Ulysses. You play as part ..

C$37.00

Fool's Gold: Into the Bellowing Wilds

Fool's Gold: Into the Bellowing Wilds

Based on the popular Fool's Gold animated YouTube series by Dingo Doodles! Fools Gold: Into the ..

C$70.00

AA#33 The Halls of Lidless Shabbath

AA#33 The Halls of Lidless Shabbath

Rolled into a yard-tall, ivory scroll tube, the worn charcoal rubbing of a giant map etched into an ..

C$8.00

The Last Job You'll Ever Need

The Last Job You'll Ever Need

If you’ve ever idly stood in line at a bank, or worked an unrewarding job, and wondered “How would I..

C$33.00

Cartograph - Atlas Edition

Cartograph - Atlas Edition

Cartograph is a journaling TTRPG about map making, exploration, worldbuilding and resource managemen..

C$50.00

Dirtbags!

Dirtbags!

A cinematic sci-fi shooter ttRPG where players take on the role of convicts in a corporate-run dyst..

C$30.00

Galatea - Paragon Ed

Galatea - Paragon Ed

You were made to be perfect. And yesterday you came alive. How long can you remain this way? Galatea..

C$26.00

Going for Broke

Going for Broke

A fast-paced sitcom roleplaying game about a collective house scrambling to get enough money toget..

C$15.00

Lignées Royales

Lignées Royales

Un jeu de rôle solo de généalogie royale et de narration. En tant qu’historien royal, il est de votr..

C$18.50

Mouse in the house!

Mouse in the house!

Us mice are smarter than the bigfolk think. We know how to solve puzzles, keep ourselves clean, and ..

C$15.00