Sandy Petersen's Cthulhu Mythos for Pathfinder

Created by Sandy Petersen

Sandy Petersen's Cthulhu Mythos for Pathfinder
Photo original
2,328 backers pledged $203,503.00 on Kickstarter

The definitive guide by Sandy Petersen. New rules and over 100 monsters for the Cthulhu Mythos plus tons of 28mm scale miniatures.

Raised in Kickstarter
$203,503.00 / 2,328 backers
Raised in BackerKit
$73,414.49 / 2,394 backers

Learn About Our Project:

Sandy Petersen is the undisputed authority on the Cthulhu Mythos in games as the author of the groundbreaking game Call of Cthulhu, the first game ever to bring HP Lovecraft’s work to the gaming world.

He now proudly presents Sandy Petersen's Cthulhu Mythos for Pathfinder, by Petersen Games. This is the definitive and ultimate guide to bringing Lovecraft to the high fantasy sword and sorcery worlds played using the Pathfinder rule system. 

Your band of heroes can now fight (and maybe even defeat) monstrous horrors and bizarre, inhumanly advanced races in adventures featuring these unique entities, their magics, and the alien technologies accurately portrayed from Lovecraftian works!

We're offering a lot with this Kickstarter. Some of you have asked how to add copies of the book or more sets of miniatures to your pledge. It's easy - just add the price of the item you want to add to your pledge after clicking the Manage button in the upper right corner of this page.

Or just use this convenient copy we made!

For easy reference, here's a list of Add-On prices:

  • Add $35 per print copy of the book
  • Add $70 per Dwellers of the Dreamlands Campaign Collection
  • Add $70 per Former Human Horrors Campaign Collection
  • Add $70 per Cosmic Nightmares Campaign Collection
  • Add $70 per Shadows Out of Time Campaign Collection
  • Add $35 per Primal Horrors Adventure Kit
  • Add $35 per Foulness From the Stars Adventure Kit
  • Add $35 per Shadows Out of Space Adventure Kit
  • Add $35 per Dwellers of the Abyss Adventure Kit
  • Add $15 per Cultist Horde Pack
  • Add $15 per Deep One Horde Pack
  • Add $15 per Mythos Ghast Horde Pack
  • Add $15 per Moonbeast Horde Pack
  • Add $15 per Mutant Horde Pack
  • Add $15 per Tcho-Tcho Horde Pack
  • Add $15 per Mythos Ghoul Horde Pack
  • Add $35 per Designer's Collectors Kit
  • Add $30 per Hero Lab license
  • Add $15 per Glow in the Dark Elder Thing
  • Add $25 per Monster Deck

For example: If you have selected the HERO PLEDGE option and want two extra Horde Packs, just raise your pledge from $200 to $230.


  • A bestiary with over 100 entries, almost half never before seen in a Pathfinder book before.  
  • Over 25 Mythos Entities: Creatures in the Pathfinder Bestiaries I-V now authoritatively revised & updated in this book. Additionally, the original entries as found in the Bestiaries I-V are also included for easy reference and comparison. 
  • Over 50 NEW Mythos Entries: Creatures from the Cthulhu Mythos that have never before been published in any Pathfinder Bestiary.
  • Over 40 'Unusual Suspects': Creatures that could (and maybe should) be in the Cthulhu Mythos, found in the pages of the current Pathfinder Bestiaries. Some have been updated to reflect our new rules. 
  • Adventures: Plot Hooks and Campaign starters by Sandy Petersen and others. 
  • How to run horror in a heroic sword and sorcery setting by Sandy Petersen.
  • Mythos Alien and Bizarre Technology (Stretch Goal; Funded!)
  • New Expansive Insanity Rules (Stretch Goal; Funded!)
  • The Necronomicon and other Tomes (Stretch Goal; Funded!)
  • New Rituals and Spells (Stretch Goal; Funded!)
  • Archetypes and Class Options for Base Classes (Stretch Goal; Funded!)
  • Cults of Cthulhu and Other Great Old Ones (Stretch Goal; Funded!)
  • Mythos Magic Items and Artifacts (Stretch Goal; Funded!)
  • Aklo Language Essay (Stretch Goal; Funded!)
  • Mythos Ghouls as Player Characters (Stretch Goal; Funded!)
  • Mythos Eidolons, Familiars and Animal Companions (Stretch Goal; Funded!)
  • Tcho-Tchos! (Stretch Goal; Funded!)
  • Gnorri as Player Characters (Stretch Goal; Funded!)
  • Advanced Adversaries (Stretch Goal; Funded!)
  • Zoogs as Player Characters (Stretch Goal; Funded!)
  • Mythos Cats and Mythos Cats as Player Characters (Stretch Goal; Funded!)
  • Campaign Launch Adventure (Separate PDF) (Stretch Goal; Funded!)
  • Hero Lab Data Files! (Stretch Goal; Funded!)
Example layout - Not Final.
Example layout - Not Final.

The Pathfinder Roleplaying Game is an evolution of the 3.5 rules set of the world's oldest fantasy roleplaying game, designed using the feedback of tens of thousands of gamers. Since Paizo released the first playtest documents in March of 2008, more than 50,000 gamers have downloaded the rules and posted their feedback, resulting in a year-long open playtest that was the largest in the history of tabletop roleplaying games. Going back to the beginning of the game's third edition, the rules engine that powers the Pathfinder Roleplaying Game have enjoyed more than 15 years of active playtesting and revision. 

Some Cthulhu Mythos has already been introduced in Pathfinder, but we plan to bring an authoritative expertise of Lovecraftian Horror to the game. Our goal is that this book will be the ultimate guide to the Cthulhu Mythos for the Pathfinder Role-Playing Game

Sandy Petersen brought Cthulhu to role-playing games with his groundbreaking game Call of Cthulhu and now wants to bring the Mythos to the high fantasy world of Pathfinder. 

We also believe that no game of Pathfinder is complete without great miniatures, and we have plenty to include in this campaign. These miniatures come fully assembled and ready to be played immediately.

The miniatures are all in scale with Sir Pointsalot and with each other. (Yes the miniatures are really that big.)

The miniatures are all in scale with Sir Pointalot and with each other. (Yes the miniatures are really that big.)

The miniatures are all in scale with Sir Pointalot and with each other. (Yes the miniatures are really that big.)

Designer Pledge

We want to offer a few select backers the unique opportunity to put their mark in the Cthulhu Mythos. You will work directly with Sandy Petersen and his design team to create a creature based on a miniature. 

That creature will be published in Sandy Petersen's Cthulhu Mythos for Pathfinder! As a backer at this pledge, you will have selected a one-of-a-kind Designer Pledge Level. As a member of the design team, your design will forever live on in Pathfinder history!

Meet the Designers

Sandy Petersen's name is synonymous with Cthulhu in gaming. He is a well-known game designer and horror personality. In 1981, he designed the cult game Call of Cthulhu, the very first game to incorporate the Cthulhu Mythos. It has been translated into many languages and is still played worldwide. 

Sandy developed dozens of roleplaying games, campaigns, and supplements. In 1988, he moved on to video games and was a designer on Civilization, Doom, Quake, and the Age of Empires series, among many other games. He inserted tributes to Lovecraft (sometimes hidden) in every game. In 2011, he was Executive Producer on the critically acclaimed movie The Whisperer in Darkness, based closely on the story by H. P. Lovecraft. 

In 2015, he released the famous tabletop boardgame Cthulhu Wars, about the conquest of the earth by the Great Old Ones, and now runs his own small game company. His games have sold tens of millions of copies worldwide, and he has received dozens of awards from the game industry. He is regularly a guest at gaming and horror conventions around the world.

Arthur Petersen has lived and breathed the Cthulhu Mythos with his father for most of his life. Arthur has worked for Petersen Games as the Production Manager for a little over 2 years. His first game as a developer was Cthulhu Wars and its expansions where he helped to test, balance and develop the game. He has been an avid role-player, steeped in the Cthulhu Mythos for over 15 years. 

Ian Starcher has worked in every facet of the game industry on and off for the last 30 years, starting with his stint at Chaosium Inc. Ian is an expert on the Pathfinder system and is Petersen Game's newest team member.

Special thanks to miniatures painters

  • Avalon Starcher 
  • Ben Brownlie 
  • Chris Ewick 
  • Ian Phillips of Iron Tusk Miniatures
  • Kevin Fox 
  • Paul Sanderson 
  • Roy Duffy 
  • Stone Cold Lead 
  • Tim Prow
  • Chase Norton

Photos of painted miniatures by Sheri Starcher.

Cool looking dice provided by Zucati Dice: Minimalist Metal Dice (pre-orders still available on Kickstarter).

Kickstarter Consultant: Gamerati

Graphic Design Help from: Immortal Nights and Shadestream148

Latest Updates from Our Project:

An Introductory Essay and PC Races images
6 months ago – Sat, Feb 04, 2017 at 12:25:37 AM


A quick update this week. Wanted to show something a little different, first the 4 PC races together. This (or possibly a variant) is for the beginning of the PC Races chapter.

I'm actually a little confused why the ghoul looks so feral. Maybe they're just chaotic evil.
I'm actually a little confused why the ghoul looks so feral. Maybe they're just chaotic evil.

Sandy on Horror 

And here is something from the introduction chapter - essays from Sandy about things that may be useful for gamemasters in particular. 



Next week we might be able to show you the awesome, final cover. My poor brain likes it so much I can almost move inside my can with the force of my enthusiasm. 

 - Brain Cylinder #83.7.1.

Insanity chapter!
6 months ago – Fri, Jan 27, 2017 at 10:13:50 PM

Fellow Adventurers,

We told you in a prior update that we would hold off this week on our update due to a company summit (as well as preparations for going to PAX South, where our marketing/sales team is now). However, I had to sneak this one in, because the final chapter illustrations are so close, and this rough for the chapter on Insanity came in this morning. I love it!

This is actually nothing more than a photo of the real life psychiatrist (Dr. Bruce Ballon) who is helping us write the chapter on Insanity.
This is actually nothing more than a photo of the real life psychiatrist (Dr. Bruce Ballon) who is helping us write the chapter on Insanity.


The Yellow Sign Cult!
6 months ago – Wed, Jan 18, 2017 at 06:32:51 PM

I believe the Yellow Sign edged out all others, so here is the first page of The Yellow Sign Cult in the Cult's Chapter:


PDF of the page for you:

Click Right Here! NOW! Because if you don't, you'll never see the Yellow Sign!

We are getting closer to having the final chapter illustrations complete and may show you that next week instead. The final layout being done is not too far away now!

- Brain Cylinder 83.7.1 

Dreamlands Cats!
7 months ago – Thu, Jan 12, 2017 at 10:13:24 PM

For reasons completely opaque to me, info about Dreamlands Cats beat out all other possible sections for the book! HPL did love cats!

Without further blather, here is the second page of the section on Cats! (again, not the real page number) - 


If you can't read it well, here's a link to this page as a PDF:

Next Week

Cults seemed to be the second place, so there's a new vote to be had. Which of the following Cults do you want to see a page from? - 

Cult of Cthulhu

Cult of the Black Goat

Cult of the Crawling Chaos

Cult of the Daemon Sultan Azathoth

Cult of the Opener of the Way

Cult of the Sleeper

Cult of the Windwalker

Cult of the Yellow Sign

Other Great One Cults [this is a section that briefly covers smaller cults not big enough to warrant an entire section, such as the "Cult" of Abhoth, such as it is]

Tcho-Tcho culture

 - Brain Cylinder #83.7.1 (Arthur)

The Painted Gate!
7 months ago – Mon, Jan 09, 2017 at 08:18:41 PM


This is a surprise update - we realized we never showed you what the factory painted gate is going to look like. This was painted by the factory as a sample for us (all the gates are manufactured, but the mass painting is not complete). The original painter was brain cylinder Ian's daughter (who also painted many of the minis for the displays on this Kickstarter). But these images are NOT her painting, they are done in China.

(You got a free one if you backed this campaign for $100+ not counting shipping).







It's water and dirt, around the stone pillars, and the red is blood.
It's water and dirt, around the stone pillars, and the red is blood.

Our theory is that you pour the blood into the tops of the pillars, it runs down and through a hidden channel in the rock it flows up to fill the circle around the sigil in the center, as well as the symbols just inside the circle. The blood on the sigils around the pillars might be painted on separately, but I'm sure it's blood too.

Next Update (this Wednesday)

Later this week we will still do another update with something from inside the book - looks like it's still a race between PC races and cults! Who will win?....