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Call of Cthulhu Keeper Rulebook - PDF

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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


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


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

Play online with our Licensed Partners

Do you play on a Virtual Tabletop? Our partners offer products for playing this scenario online.

Watch Live Play: Call of Cthulhu Keeper Rulebook

Curious about the scenarios? Watch the Live Play on the Stream of Chaos

What The Critics Say

Call of Cthulhu - Keeper Reviews

  • The stars are right for the best edition of the best role-playing game in the world.

    — Antonios S., Call of Cthulhu Review.

  • "Call of Cthulhu is now the Pepsi of RPG franchises, alongside D&D’s Coke, and the game’s success is part of the revival of Lovecraft and Lovecraftian fiction."

    — Paul StJohn Mackintosh, Greydog Tales., The Legacy of Lovecraft.

  • "The Call of Cthulhu RPG has been in print from the same publisher since 1981. It is the horror RPG that all other horror games are judged by."

    — Powell’s Bookstore., Call of Cthulhu RPG.

  • Call of Cthulhu has been called “one of the best roleplaying games of all time”(Geek & Sundry But something that’s overlooked about this classic horror RPG… is that it’s also one of the most versatile and well-researched historical RPGs around... I mean honestly, you can now play CoC in more time periods than your average season of Dr Who.

    — Games Vs Play., 5 Reasons Why.

  • "…one of the most iconic tabletop roleplaying games of all time."

    —, 10 hugely influential figures you didn't know were Mormon.

  • "The ultimate horror RPG, Call of Cthulhu is a stone-cold classic of the tabletop."

    — Tabletop Gaming Magazine (UK)., Top 10 Roleplaying Games.

  • "God, I love this book... Basically, everything you’d want from a new version of your favorite horror game and the best iteration to date."

    — Vintage RPG., This is the Keeper Rulebook.

  • "It almost destroyed my life and career"

    — George RR Martin., (Game of Thrones).

  • "10 out 10 - Still the number one option for Lovecraftian roleplaying. The Keeper Rulebook provides all you need to bring the Cthulhu Mythos to your game table, presented in an easily understood manner."

    — The Gaming Gang., Keeper Handbook Pagethrough.

  • "One of the most well-known and beloved tabletop RPGs on the market."

    — Wargamer, Tabletop RPGs: the best tabletop roleplaying games.

  • "There is a reason why Call of Cthulhu is regarded as one of the greatest roleplaying games ever published. It is a classic piece of design that successfully emulates the singular genre it is inspired by and in doing so, introduced new ways to roleplay and tell amazing stories as well as innovations to the roleplaying hobby that are still influential today. It is always going to be the greatest horror roleplaying game there is, not just because of the Mythos, but because of its influence, innovations, and the simple fact that it can still give you a great playing experience."

    — Reviews from R'lyeh, 1500th Review.

  • "A well-known cornerstone of hobby shops all around the world."

    — The Gamer, 10 Best Tabletop Games Based On Books.

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PDF Product Name: [RuneQuest: Roleplaying in Glorantha - PDF]
PDF Product Link: [/call-of-cthulhu-keeper-rulebook-7th-ed-hardcover/]

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Physical Product Name: [Call of Cthulhu - Keeper Rulebook - Hardcover]
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Year Released:
Page Count:
Color Hardcover with PDF
Sandy Petersen, Mike Mason, Paul Fricker, and Lynn Willis
Cover Artist:
Sam Lamont
Jonathan Wyke, Paul Carrick, Rob Gould, Fran.ois Launet, Victor Leza, Charles Wong, Mike Perry, Nicholas Cloister, Antonio Luis, Kalli Schulz; Interior Illustrations: Rachel Kahn, Grilla, Chris Huth, Lo.c Muzy, Paul Carrick, Scott Neil, Jonathan Wyke
Steff Worthington
  • Full Star Full Star Full Star Full Star Full Star 5

    Posted by Brian Sandall on 10th Nov 2022

    Everything a keeper needs and filled with great advice.

  • Full Star Full Star Full Star Full Star Full Star 5
    Ideal rulebook

    Posted by Nikita Karatun on 3rd Apr 2020

    It is just perfect! The structure, the language, the design, the pictures, the quality of the files! Navigation works like a charm, so easy to find your way around. Special thank's for mobi and epub files. To be honest I hate pdf format so much, almost all table top rpgs rulebooks and scenarios are published in it. It's completely insufferable to read them on mobile phone or on standard screen size e-reader and no way to convert them to decent readable format... I'm so glad that you publish your rulebooks in convenient readable formats! Hopefully more and more materials will be published that way!

  • Full Star Full Star Full Star Full Star Full Star 5
    Fantastic PDF, or MOBI / EPUB / PRC

    Posted by G. Ramos on 13th Jun 2016

    This is one of the best PDFs I've ever seen of a core rulebook. It has been carefully laid out for readability, includes chapter / section breaks, and comes in multiple formats. I dropped the PDF onto my iPad and phone, the prc onto my Kindle, and the EPUB for working with the text. Best of all, the PDF is not secure, so you can manipulate the pages or extract them to make your own reference documents. This was worth every penny!