Cults of Cthulhu - PDF

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Cthulhu Calls!

At long last, the intricacies of the nefarious Cthulhu cult are revealed!

Chaosium Unveiled: Inside Cults of Cthulhu

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

What’s Inside?

Cults of Cthulhu gives you the rules to inject fully-realized and unique Cthulhu cults directly into your campaigns, and create your own antagonists. The tome also contains three scenarios featuring insidious Cthulhu cults spanning from the Gaslight era to the modern day.

Cult Leaders

Secrets of the Cthulhu Cults

Secrets of the Cthulhu Cults

A detailed history of the various cults of Cthulhu, spanning from the Victorian Era all the way to the modern day - perfect for any era of Call of Cthulhu play. The book also includes five distinct cults, ready for use in your games.

Conflict Rises

Design Your Own Cult

Creating a Cult

Detailed guidance on creating your own bespoke Cthulhu cult. Included is a ‘Cults Worksheet’ to track the history of your cult, their inspirations, resources, locations, and much more.

Example Cult

A Suite of Scenarios

Three scenarios concerning Cthulhu cults across time.

Loki's Gift

Loki's Gift

London, 1896. A tragedy in an upper-class family sees the investigators employed to look into the truth behind a beloved son’s demise.

Angel's Thirst

Angel's Thirst

Los Ángeles, 1923. The search for a missing taxi driver kicks off an investigation tainted by the criminal underworld, and perhaps something darker.

A God's Dream

A God's Dream

Chicago, 2021. When a former colleague is found frozen to death and clutching a mysterious artifact, the investigators begin to question the nature of their free will.

Downloads for this Product

Keeper Reference Booklet
Keeper Map Pack
Player Handouts and Maps
Plain Text Handouts
NPC Portraits


What The Critics Say

  • "There are 370 pages in Cults of Cthulhu and the detail and information packed into them really is extraordinary... There is absolutely no question in my mind that Cults of Cthulhu is an essential addition to any Call of Cthulhu Keeper or Investigator’s bookshelf, as well as that of anyone with an interest in the Cthulhu Mythos generally. Get a copy as soon as you can."

    — GameOnAUS, A Cult Above - Cults of Cthulhu RPG Sourcebook Reviewed.

  • "This is a very impressive book, and you will certainly get value for money."

    — M.T. Black, Twitter Review.

  • "A surprisingly detailed sourcebook to the point where its appeal goes beyond the RPG elements and it would be interesting reading for any fan of the Cthulhu Mythos—making it an appealing gift for the Lovecraftian Horror fan in your life."

    — Royce Wilson, The GOA 2021 Table-Top RPG Gift Guide.

  • "A compendious and superlatively produced supplement for Call of Cthulhu, devoted to the cults devoting themselves and their sanity to Big Squidface, across the ages and the continents. If there's one book needed for Keepers to put awe and terror back into their Cthulhu-focused campaigns, it's this one... [a] fabulous piece of work that belongs on the shelf of every CoC gamer, and probably a great many others besides - it's that useful, and that good."

    — Paul StJohn Mackintosh, RPGNet, Review of Cults of Cthulhu.

  • "An important part of the Cthulhu Mythos mystery ecology... a fantastic book for Keepers"

    — Charles Dunwoody, EN World, A Review of Cults of Cthulhu.

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Year Released:
Call of Cthulhu 7th Edition
Full Color PDF
Page Count:
Chris Lackey, Mike Mason
Cover Artist:
Loïc Muzy
Interior Artists:
Alberto Bontempi, Thomas Brown, Irene Cano, Kristina Carroll, Caleb Cleveland, Stephen Cornu, Kring Demetrio, Emanuele Desiati, Michael Ellis, Andrey Fetisov, Doruk Golcu, Nicholas Grey, Patrik Hell, Kali Houisse, Pat Loboyko, Sam Lofti, Ernest Mason
Cartography and Handouts:
Matt Ryan
Nicholas Nacario
  • 5
    Cults of Cthulhu for CoC 7E

    Posted by Shane Bauer on 23rd Mar 2022

    This is a terrific CoC supplement, one of the best last year. One thing that's always been missing from the game was, "What do all these cults do when they're not getting shot at by the Investigators?" Asked and answered! I can't recommend it highly enough and can't wait until the print version is out.

  • 5
    Superbly done work.

    Posted by Scott Edward Nash on 13th Mar 2022

    I was not sure if this book would be helpful to me, but I was very pleasantly surprised with the content and quality of the information that was put into it. It is a very interesting read and well thought out. I am now anxiously awaiting the physical copy to be available. If you have any interest at all in exploring the ideas and structures of cults or want to create your own - this is the book for you. Really well done and a great example of the love Chaosium has for the Cthulhu mythos.

  • 5
    Well Written

    Posted by David LaSelle on 30th Oct 2021

    Grade A Book. I would recommend it to anyone