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:

It's here! Well, in TEXT form
about 1 month ago – Fri, Jun 16, 2017 at 01:11:49 AM

Shortly I'll be sending an email via BackerKit that has a link to a folder in my Dropbox containing PDFs of the 9 original chapters of this book (chapter 10 contains previously published versions of various Mythos monsters that we did not create, so I'm not bothering to share those).  

This is now going to layout - which already has borders, styles, fonts, etc.; it will just be a matter of slotting in the text - which is no small task, I might add! But the initial artistic parts of lay out are at least taken care of.  

Note that while this has been edited (with what is termed a HEAVY copy-edit), standard practice is to have a final proofread AFTER layout as well. So, we will do that at the very end also - but in the mean time, if you catch any errors, feel free to note them on this very basic google form; it will certainly help speed up the final proofing after layout!  

Also, since I'm the one who posts these updates (usually), I get to brag here as well. Well, I’ll get to that. Let me back up a bit.  

So, here was our process. Sandy, while a serious veteran of writing role-playing games and supplements, has never written for Pathfinder specifically. But this is obviously HIS (updated) interpretation of the Cthulhu Mythos. So, he generated the ideas and wrote extensive design documents for the chapters and specific sections. He also wrote specific notes, sidebars and essays that have no rules that are essentially retained as he wrote them.  

All the things that require rules and mechanics (which is the majority), had to be “translated” so to speak from Sandy’s design documents into Pathfinder-ness. That was done primarily by two people who I believe did an excellent job – James Jacobs and David Ross. Also, our two main editors, Eytan Bernstein and Erik Scott de Bie actually did a little bit of development as well, but mostly in clarifying and tidying rules things up (you don’t want your editors doing full development, obviously). Like I said, they did a HEAVY copy-edit, and deserve key praise for their work.  

In any case, so that was our basic process. I was fortunate enough to be allowed to do some design as well. So, here I’ll inflate my head like a hot air balloon and say that I did the design for the majority of the spell descriptions and ritual descriptions (though not the basic ritual RULES themselves, which were a collaboration between Sandy and Ian Starcher). I also designed the majority of the various items/artifacts. Of course, a huge amount of these are really based on “classic” Mythos ideas, or even some stuff from Sandy’s Cthulhu Wars. And, of course, Sandy reviewed it all and accepted it with his Mythos stamp of approval.  

I also designed the Byakhee, Dark Young, Dimensional Shambler, Gnoph-keh, Hunting Horror, Leng Spider, Servitor of the Outer Gods, and, my very favorite, the horrific Daughter of Shub-Niggurath. So, I sincerely you hope you really like all of those monster entries. I certainly had a lot of fun designing them. And if you don't like them, well, then you know who to blame! 

Sandy did virtually all the rest of the monster designs (though James Jacobs did a small handful), except for the various “collaborative” designed monsters that some of YOU backers designed (such as the Abyssal Custodian and Eremite, among others)! All the monsters were translated expertly into great stat blocs by James Jacobs and David Ross.  

Sandy designed 100% of the Great Old Ones, and then James Jacobs crafted an entirely new Pathfinder format for them as stat blocs (since they can’t really be encountered in the same way as a “monster”).  

The Races were primarily designed by Sandy, but Ian Starcher, our business manager and brainchild of this project, also lent some design to the PC races (that was his main contribution in terms of design).  

The rest of the book was effectively designed by Sandy, with various additions from James Jacobs and David Ross. We also had minor help from a variety of folks who lent a hand along the way.  

Thank you to all for your long-suffering patience as we finished this massive mythos tome! Man, we should have called it the Necronomicon or something.

The New "Dire" Cthulhu
about 2 months ago – Fri, Jun 09, 2017 at 11:38:13 PM


I just attempted a feature on BackerKit I've never done before, sending y'all a dropbox link containing this image:

Since "normal" Cthulhu is the most powerful and scary entity on the planet....what do we do about him?
Since "normal" Cthulhu is the most powerful and scary entity on the planet....what do we do about him?

Please let me know in the comments if it worked, and you got such an email with a dropbox link. 

This image is just a little gift to you for your continued patience. 

Next week, I'll do the same and include a dropbox link to a folder containing the book's final text. Please do not share it with anyone. 


Arthur - I'm free from my brain cylinder! aahahhahahaha. I have formed a new terrible body!

Small shipping update - US/Western Hemisphere
about 2 months ago – Mon, Jun 05, 2017 at 11:06:21 PM

Straight from our shippers:

UPS came. They took about 20% of the boxes we have for them. Two trucks were filled. UPS left. 

They say they are coming back with more truck(s). I'll let you know when that happens. 

Also... The last of the international packages (in the Western Hemisphere, anyway) are getting picked up now:

Canada still en route in freight. 

No update for the RoW at this time.

A Big Shipping Update + news on the book!
about 2 months ago – Fri, Jun 02, 2017 at 01:19:35 AM


First, over a dozen folks in the US have had last minute address changes. Some we didn't discover until they were already in the mail. If you recently moved, and believe you didn't change your address in time in our system, please email support at petersengames dot com TODAY ASAP!

The shipping of the plastic sets is slowly but surely moving along. We are in the thick of it, and this means that very shortly the long nightmare will be over and everyone will have their orders! Here is a video our US fulfillment warehouse made over the holiday weekend while they worked to package your orders up:

Here are the details for each region:


 Plastic sets still all the way fulfilled, as before.  


Many US orders are already out the door. Our shippers say that the last batch of US orders will be out the door on Monday, June 5th. It’s actually a little better than that – they say all orders should be packed up and ready to go by Friday, but Monday will be the next actual pickup available from the couriers. Since they couldn’t begin until Saturday, May 20th (after sorting SKUs, etc.), this means they are handling the entirety of the pick and pack in about two weeks. For a project of this scale that is quite fast!  

Note that they do NOT print shipping labels until they are actually picking and packing for your box. Why does this matter? Because when the label is printed, your tracking email is generated. (For example, some fulfillment warehouses print all the labels at the beginning of the process, so you would have an email telling you its on the way, but tracking shows no movement for many days because they haven't actually even packed your order!). Our US warehouse doesn't do that, which means when you get your email, it is going to be picked up by UPS the next morning (or possibly the same day) and will actually be on its way to your home.

Also, note that to expedite shipping, some backers (though a distinct minority) are receiving two separate packages in the US. This is not the case for most orders which should get their entire order in a single box.  


Products for orders in Canada are in the process of being freighted to a Canadian fulfillment center. Because of the scale of their operations and the number of Canadian packages they are estimating that Canada backers will have all their orders in the mail by about the same time the last batch of US orders are out the door as well. It is possible US beats Canada by a day or so, but there will not be a significant difference!  


Our European fulfillment center had some hiccups in their logistics and they were not able to begin last week as planned (and no, this wasn’t even related to the bad weather or lack of available trucking as explained previously, but a third issue). Ye gads, sometimes I think Nyarlathotep himself is actually cackling at me.  

In any case, the first orders for EU should be going out this Friday, in two days. They should, however, be able to send it all out within a few days, once it begins (they are a big operation and fairly fast). You should be expecting tracking emails soon for EU.


Australia is still in a bit of a conundrum. Some orders have been sent, if we have all the SKUs associated with your order. The factory made some errors in how many of each SKU they are supposed to send for each region. There were mistakes in the amount of SKUs per product in US, EU, and Australia. However, it ended up such that Australia had fewer than needed, whereas US and EU had more than they were supposed to have.

Needless to say, this has been an additional bonus problem our shipping manager James has had to deal with.  

Now that the US container and EU containers are fully unloaded and counted, we need to freight some products from both EU and the US to Australia in order to be able to fulfill all Australia orders. That will take some time, which means many Australian backers will have to wait a few weeks until they will finally get ALL their rewards.

However, given the delays you've already experienced, we are biting the bullet and sending you partial rewards right now. This will cost us more, but we feel it is worth it to get even a few of your products sooner, rather than have to wait for well over a month to get anything. I will update you when the remaining product arrives in Australia from US and EU, and you will get your remaining SKUs.

If you have any issues at all, please email support at petersengames dot com. But be patient, as James simultaneously handles customer support as well as shipping, and right now he is very busy. He should get back to you in a timely manner, but it may take more than a day. 

What about the book?

Our copy editors are working to deliver the entirety of the book on June 15th. When that happens, I will make an update just for backers in which I will share the book's text with you. You will therefore be able to read it, though without the art and layout. 

As soon as the layout is done we will of course share it with you immediately as well. 

Brain Cylinder #83.7.1

Miniature sets have escaped customs + a long expected book update!
2 months ago – Tue, May 16, 2017 at 11:34:28 PM



We have good news for the Americas. The plastic sets are out of US customs! We have been told that 2 of the 4 containers will arrive at our fulfillment facility on Thursday at 9am, and the other 2 will be there Friday morning.  

Our fulfillment center says it will be able to unload all by Friday evening. Then, they will count and sort on Saturday. Due to picking and packing, I don't expect the first orders to be able to go out until a few days later; I will update when I know they are actually in the mail to your homes. 


The European fulfillment center will receive one container tomorrow and the remaining two on Thursday. They estimate that the European region orders will be going out the door by the middle of next week.

If you are also a backer on our Cthulhu Wars: Onslaught 2 Kickstarter your order from that project will be combined with this one in the mail. 

What about the Book?

I don't want to do an update without mentioning the book's recent great progress. 

It has taken many months longer than we initially anticipated but as of yesterday ALL OF THE DEVELOPMENT IS 100% COMPLETE! 

There are no rules, lore or flavor text left to be written, and there is no art left to do (actually, the art has been done for several weeks). Over the past 7 weeks we also enlisted the help of David N. Ross to tidy up several sections that needed rules clarifications, additional content and general Pathfinder-ness added. But that is now complete, meaning that every section can go to editing. This has resulted in a few small additions we didn't even anticipate, let alone show in our many stretch goals. I'll let you discover them on your own. They will be nice little surprises, like finding the Yellow Sign...

We have two professional editors tackling each chapter right now. It is industry standard for a role-playing book to have every section double checked, meaning both editors actually see the entire book. This means it does take a little longer, as you cannot split the chapters up. (I am trying to speed it up as much as I can by having each one take half the chapters for the first pass, and then swapping, but will still stagger them anyway to get to layout one by one). 

I have spoken to our layout professional and our plan is to provide to you PDF downloads of each chapter as they are finished (and then, the whole book as a single file when it is done). I will likely put the single chapter downloads in backer only updates. 

I am hesitant to provide a public timeline for the moment, due to our delays and incorrect predictions in the past. However, we have an internal timeline that the editors and layout person are shooting for. It will hopefully not be long when I can feel confident in the team's process and pattern to announce when we expect it to really be done.

- Brain Cylinder #83.7.1