Sandy Petersen's Cthulhu Mythos for Pathfinder

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Sandy Petersen's Cthulhu Mythos, Pathfinder PDF Edition

Sandy Petersen's Cthulhu Mythos, AKA Sandy Petersen's Cthulhu Mythos for Pathfinder

Publisher: Petersen Games

Product Code: ABC123

Publishing Year: 2017

Pages: ~513

Cover Price: $19.99 (Pathfinder PDF)

Author(s): Sandy Petersen with James Jacobs, Arthur Petersen, and Ian Starcher

Artist(s): Cover and Interior Artist: Kent Hamilton, Additional Art Helge Balzer, Richard Luong

Setting(s): Golarion (Pathfinder 3rd Ed. D&D)

Format(s): digital PDF, hardcover, leatherette special edition

ISBN: 978-0-9995390-0-2 (Collector’s Edition: ISBN-13: 978-0-9995390-1-9)


  • Chapter I: Getting Started (Using This Book; What is the Cthulhu Mythos?; How to Bring Horror to Heroic Fantasy
  • Chapter II: The Mythos Player Character Races
  • Chapter III: Character Options (Character Options, Companion Options, New Profession and Feats, Race Options)
  • Chapter IV: Insanity and Dreams (Insanity and Dreams; Ia! Ia! Cthulhu fhtagn: An Aklo Primer; The Dreamlands)
  • Chapter V: Magic (Magic and the Mythos; Spell Lists; Spell Descriptions; Rituals)
  • Chapter VI: Mythos Items and Artifacts (Introduction to Mythos Items and Artifacts; Alchemical Items; Alien and Bizarre Technology; Artifacts; Books of the Cthulhu Mythos; Mythos Magic Items and Artifacts)
  • Chapter VII: Cults (Introduction to Cults; Black Goat Cult; Crawling Chaos Cult; Cthulhu Cult; Azathoth Cult; Opener of the Way Cult; Cult of the Sleeper; Windwalker Cult; Yellow Sign Cult; Lesser Cults; Tcho-Tcho Culture; Deep One Culture; Mythos Entities and Religion; Other Races and the Mythos)
  • Chapter VIII: Great Old Ones and Outer Gods (As a Foulness Shall Ye Know Them; Great Old Ones, Outer Gods, and Their Ilk)
  • Chapter IX: Mythos Bestiary (Introduction to the Mythos Bestiary; Advanced Adversaries)
  • Chapter X: Expanded Mythos
  • Index: Creatures, PC Races, & Templates
  • Sidebars:
    • Dreamlands Cat Racial Traits
    • Ghouls Raised by Others
    • Gnorri Weaponry, Gnorri Builder Magic, Gnorri Family Terminology, Gnorri Ranger Combat Styles
    • Dread Stages; Optional Rule: Dread Resistance; Sanity Damage; Insanity-Inducing Spells; Fantasy Insanity
    • Gamemaster’s Note
    • Alchemical Items
    • Using Metamorphic Venom: Strike and Escape
    • Obliviousness and Disinterest in Action
    • Non-Euclidean Geometry
    • Using Ghatanothoa
    • Hastur's Effect on Reality and Perspective
    • Caught in the Storm
    • Using Yog-Sothoth
    • Describing a Dimensional Shambler
    • The Insane Dead
    • Yithian Technology
    • Using Yithians

Front Cover Text

"Sandy Petersen's Cthulhu Mythos with James Jacobs, Arthur Petersen, and Ian Starcher. Pathfinder Role-Playing Game Compatible.

Back Cover Text

"The Stars are Right! A one stop source for any Mythos monster encounter for your game! New rules for encountering Great Old Ones, the vast cosmically powerful entities of the Cthulhu Mythos, are presented as well. Cthulhu and his friends are far too powerful to serve as mere encounters with a normal stat block. Instead, this book presents them with an Elder Influence stat block, created to represent beings of enormous power. There are 25 Great Old Ones presented, from Abhoth to Yog-Sothoth, the Opener of the Way! It includes four new playable races: Dreamlands cats, ghouls, gnorri, and zoogs, as well as character options for all. To add flavor to your campaign we designed special insanity rules and included an enormous section on the cults and cultists of the Mythos. There are forty new spells, plenty of magic items, and a new magic system of rituals for cultists to use. This book is the most complete and comprehensive sourcebook for all things Cthulhu. We hope it does not drive you insane!"

Comments / Trivia

"We would like to dedicate this tome to our spouses and families who tirelessly supported us during its writing and development. And to he who must not be named."


Link to outside reviews

  • [Link 1]
  • [Link 2]

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