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.
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.
Design Your Own 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.
A Suite of Scenarios
Three scenarios concerning Cthulhu cults across time.
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
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
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
Watch Live Play: Cults of Cthulhu
Curious about the scenarios? Watch the Live Play on the Stream of Chaos
What The Critics Say
- Publisher:
- Chaosium
- Year Released:
- 2021
- Ruleset:
- Call of Cthulhu 7th Edition
- Format:
- Full Color PDF
- Page Count:
- 366
- ISBN:
- 978-1-56882-439-0
- Author(s):
- 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
- Interior Artists (Continued):
- Loïc Muzy, Aleks Shcherbakov, John Sumrow, Johnathan Torres, Arrigo Verderosa
- Cartography and Handouts:
- Matt Ryan
- Layout:
- Nicholas Nacario
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Should be 5 stars, but that file size...
Beautiful PDF that clocks in at 118 MB for 370 pages. Compare that to the 449-page Keeper Rulebook that can be had for only 27.1 MB and you see my main complaint - this goes for all of the extras, too, like the 18 page keeper maps that for some reason is 76.4 MB. Other than that, very happy with this product.
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Ring Side Report- Cults of Cthulhu
Originally posted at www.throatpunchgames.com, a new idea every day! Product- Cults of Cthulhu System- Call of Cthulhu 7th Ed Producer- Chaosium Price- $25 here https://www.chaosium.com/cults-of-cthulhu-pdf/ TL; DR- Solid Book of bad guys, set ups, and tools 100% Basics- Ia! Ia! Cults of Cthulhu gives you… exactly what it says! This book is a book of four different cults, adventures to go against each cult, and tools to build your own cthulhu cult. Mechanics or Crunch- This book is VERY much a Keeper’s book and not a players’ book, and that's ok. This book has new monsters and stats for them, variant spells, and tips for building your own cult. I am honestly impressed by the depth of ideas for building a cult. I play too many fantasy games where the idea of how a cult is financed doesn't come up. But here, how the money happens is a very important way to build your cult. Even optional crunch for Pulp Cthulhu is presented! Players will find nothing in this book, but Call of Cthulhu doesn't really ever give players much more beyond the basic investigator book. The crunch doesn't disappoint in this one. 5/5 Theme or Fluff- Again, this is a Keeper book, but built in a fun, informative way to help the Keeper build a world. Each of the four presented cults have real depth and personality with individual people and their goals presented. My one minor negative is like most Cthulhu books, you really only get the 1920s as a playground. It’s the most popular time for Call of Cthulhu, so I understand why, but I do seriously appreciate the one modern cult that is presented here. Also, adventures! There are four adventures against these four cults. So even if you need a one shot, this book has you covered. 5/5 Execution- I don’t think Chaosium has ever disappointed me. Hyperlinks, solid handouts, easy reading, separate files, pictures of monsters, and everything else makes this the whole nine yards. Its 25 bucks as a PDF, which is a decent chunk for a PDF, but even if you just used this for four one-shots, that brings the price down to manageable levels of any other market adventure for CoC. And it seems that Chaosium is listening and , while I love them, the handwritten notes are hard to read, Chaosium is making just nice plain text ones as well. My one complaint is I want pregens for each of the adventures, but that is just begging for more on an already solid product. 5/5 Summary- Cthulhu is gonna be the main draw for a game called Call of Cthulhu, so why not have some humans doing bad things for him? This book is a solid resource that, even if I just wanted some quick adventures and handouts, is well worth the price of admission. If you want to build your own cults, then this is the book you might want to check out as well. NOW DO YOG! 100%
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Cults of Cthulhu for CoC 7E
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.
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Superbly done work.
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.
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Well Written
Grade A Book. I would recommend it to anyone