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Call of Cthulhu 7th Edition - Keeper's Rulebook
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Call of Cthulhu 7th Edition - Keeper's Rulebook


Chaosium's Horror Roleplaying in the Worlds of H. P. Lovecraft

The Old Ones ruled the earth aeons before the rise of man. 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.

Call of Cthulhu is Chaosium's tabletop roleplaying game based upon the worlds of H. P. Lovecraft. It is a 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 man was not meant to know. You and your companions may very well decide the fate of the world.

This book, the Keeper Rulebook, contains the core rules, background, guidance, spells, and monsters of the game. It is intended for use by the Keeper of Arcane Lore (the Keeper) — that player who will present the adventure to the other players. You must have at least one copy of this book to play Call of Cthulhu. The other players, the Investigators, should have one or more copies of the Investigator Handbook, containing expanded rules for character creation, skills, occupations, equipment, and more.

Call of Cthulhu, 7th edition, is backwards-compatible with all other available Chaosium titles with details conversion rules for earlier versions.

Character Sheets for 7th Edition Call of Cthulhu can be found here

What the Critics Say

"The stars are right for the best edition of the best role-playing game in the world."—Antonios S. Review, RPGNet.

"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, “The Legacy of Lovecraft”, Greydogtales.

"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, Portland OR.

"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

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

"The ultimate horror RPG, Call of Cthulhu is a stone-cold classic of the tabletop."—Tabletop Gaming Magazine (UK)

"It almost destroyed my life and career"—George RR Martin (Game of Thrones, etc)

2016 UK Games Expo Awards - Best Roleplaying Game

2017 ENnie Awards - Best Production Values (Gold)

2017 Beasts of War Awards - Best RPG

2017 Tabletop Gaming Magazine 'Top 150 Greatest Games of All Time' - Ranked #3, after D&D and Chess (Reader Poll)

 Customers Who Bought this Title also Purchased
Reviews (7)
Discussions (18)
Customer avatar
Jeremy H July 27, 2022 3:13 am UTC
Probably OT, but maybe you folks can help me. I purchased CoC back in the day (90s?). In that ancient edition, there was a list of Lovecraftian adjectives as an appendix. I'm looking for a similar list to aid my writing. Is there a standalone product that provides writing tips such as said adjectival fuel and adventure hooks? TIA.
Customer avatar
Brittany S April 05, 2022 3:37 am UTC
To hopefully save someone from making the same mistake I did, this is the 7th edition CORE rulebook. Just because it's branded "Keeper's Rulebook", it is NOT some sort of "Dungeon Master's Guide" equivalent, like I'd thought. But ultimately I can't be mad at giving money to this company.
Customer avatar
James L August 30, 2021 9:41 pm UTC
Why in the 7 hells is THE single greatest Cthulhu Rulebook NOT on sale for the CTHULHU SALE??!
Customer avatar
Rick M September 09, 2021 1:48 pm UTC
It doesn't need to be on sale to be worth purchasing.
Customer avatar
Ed S September 17, 2020 1:41 am UTC
I appreciate the updated pdf, but could you mention what has actually been changed?
Customer avatar
Dave T October 11, 2019 11:33 am UTC
Here is a video review that I made of the 7e system as a whole:
Customer avatar
Robert L March 24, 2018 10:44 pm UTC
Any chance for a printer-friendly version? Even printing out a few pages drains the toner in my printer. Also, why do those who purchase this title throuch get the ePub/MOBI version and those of us who purchased it here do not?

Cheers, Bob
Customer avatar
Cherch I October 04, 2017 5:58 pm UTC
I am interested in this rulebook, but I would like to get a hard copy as well. Would you consider that option in the near future?

Thanks a lot
Customer avatar
Joshua R July 02, 2017 7:54 pm UTC
Anyone else had an issue with the PDF version of this opening REALLY SLOWLY? I've tried it on multiple devices and with multiple apps on my tablet (where I prefer reading RPG books), and even if I download the file, it seems every time I open it to read, it has to refresh or reformulate the images and text. It's laborious and makes reading it a pain, because every three pages are blank when I turn to them, until it can "refresh" everything and appear. Is it just me? I've downloaded the most recent version according to my library information.
Customer avatar
Robert L August 28, 2018 4:08 pm UTC
Welcome to the world of full color .pdfs. The richness of this book in particular takes its toll on load time.
Customer avatar
Kevin Y March 15, 2020 6:27 am UTC
Book is super bulky and slow. I cracked mine open and removed all the extra images in the background of each page that aren't even viewable. Cut file size in half and made it readable on my tablet. There is a LOT of digital slop in this book.
Customer avatar
Vanderson T February 28, 2017 12:41 pm UTC
I can't open this pdf in adobe or any other devices ....
Customer avatar
C February 28, 2017 3:34 pm UTC
Good Morning Vanderson T

We're sorry to hear you are having difficulty with the Call of Cthulhu 7th Edition Keepers Rulebook PDF. Please email us at and let us know what browser you are using, what sort of computer you are using, and which version of Adobe Acrobat you are using so we can trouble shoot the problem and help find a solution.

Thank you!
Dustin Wright
Customer avatar
Sean B June 19, 2016 3:52 pm UTC
I can't get this PDF to work in Adobe. Keep getting a warning message that Acrobat can't download some embedded font and then get told that Acrobat ran out of memory. None of the fonts are on the page, unless it's zoomed in to some useless degree and even then, if I scroll or flip to another page, the fonts are gone again. The bookmarks have no labels. Other PDF's do not have the problem. Garbage file.
Customer avatar
Sean B June 19, 2016 11:53 pm UTC
Downloaded the file again just now and it works fine. Quick turnaround! Disregard above.
Customer avatar
KONSTANTINOS A V April 25, 2016 11:20 pm UTC
Anyone knows what the update includes?
Customer avatar
Mathew H April 18, 2016 6:28 pm UTC
I'm posting here to make sure no one else makes the same mistake i did.
This book should have been called the CORE RULEBOOK, as it contains everything needed for both the keeper and investigators. Had I known this i wouldn't have bought the Investigators Guide, which is supplemental.
Customer avatar
Daniel P December 09, 2019 6:41 pm UTC
Supplemental, but, in my opinion, indispensable.
Customer avatar
Mathew H January 02, 2020 4:07 pm UTC
I really wish i could delete my above comment. But yes, i agree with you.
Customer avatar
David S March 03, 2016 1:13 am UTC
How many pages is this book?
Customer avatar
Daniel P December 09, 2019 6:42 pm UTC
488, it tells you on the right at the top.
Customer avatar
Alvaro M January 31, 2016 11:12 am UTC
I was wondering if this version is being updated like the one at chaosium's site?

I bought it here.
Customer avatar
Bill H February 24, 2016 7:59 pm UTC
mine shows it was updated as of 2/22. so it looks like it is getting updated
Customer avatar
Alvaro M March 09, 2016 5:16 am UTC
Actually Drivethru emailed me about the update, very nice of them
Customer avatar
Patrick L January 23, 2016 12:39 am UTC
Does anyone have an idea when the physical copy will become available? According to the Kickstarter page, they are printing...but unfortunately I was not in on the Kickstarter and will purchase when available on retail.
Customer avatar
Gerben V February 15, 2017 6:50 pm UTC
Would also like to know since 6th also doesn't have a physical copy on here :/
I am also curious about a hardcover version since paperback/soft cover are less durable.
Customer avatar
Jacek B June 19, 2015 11:05 am UTC
Does this include epub/mobi edition?
Customer avatar
Douglas B October 21, 2015 10:43 pm UTC
I don't know whether this PDF edition includes the EPUB and MOBI eBook formats. It does if you buy the PDF directly from (speaking from experience here).
Customer avatar
Bill H February 24, 2016 7:57 pm UTC
Nope, just the PDF
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File Last Updated:
January 10, 2022
This title was added to our catalog on June 11, 2015.