Chaosium Inc.

Chaosium was founded by visionary game designer Greg Stafford in 1975. For more than forty years, Chaosium Inc has captivated gamers, readers and mythic adventurers worldwide. Its award-winning roleplaying games, boardgames and fiction have been acclaimed as some of the most engaging and innovative of all time.

Key RPG systems for Chaosium include, Call Of Cthulhu, Runequest and Pendragon.

Top Books


Call of Cthulhu Starter Set Call of Cthulhu Starter Set
Call of Cthulhu Starter Set Horror, Mystery and Investigation In A Box! The Call of Cthulhu Starter Set contains everything you need to play the world’s best roleplaying game of horror, mystery and investigation! Updated for the 40th Anniversary of Call of Cthulhu What is Roleplaying? In a roleplaying game, everyone works together in a team, each playing an investigator character. One player runs the game—the...   [click here for more ] Chaosium   $9.99  

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Call of Cthulhu 7th Edition - Keeper's Rulebook Call of Cthulhu 7th Edition - Keeper's Rulebook
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...   [click here for more ] Chaosium   $27.95  

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Call of Cthulhu Investigator Handbook 7th Edition Call of Cthulhu Investigator Handbook 7th Edition
Call of Cthulhu Investigator Handbook 7th Edition A CORE GAME BOOK FOR PLAYERS “We live on a placid island of ignorance in the midst of black seas of infinity, and it was not meant that we should voyage far.” —H.P. Lovecraft Will you stand against the horrors of the night? Whether learned professor, nosy journalist, or hard-hitting detective, investigators need all the help they can get. Let this book be your guide. The Investigator...   [click here for more ] Chaosium   $22.95  

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Delta Green Delta Green
Delta Green Welcome to America at the end of the millennium. Do you know who is pulling the strings? Delta Green knows. Things from beyond space and time that lurk and titter in the shadows, the slow rot at the core of humanity, the dark stars that whirl madly above - these are the true masters of the world. Delta Green has been fighting since the 1928 Raid on Innsmouth, and the fight still rages on. This book...   [click here for more ] Pagan Publishing   $19.98  

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Achtung! Cthulhu: Plotting Cthulhu Dossier Achtung! Cthulhu: Plotting Cthulhu Dossier
Achtung! Cthulhu: Plotting Cthulhu Dossier The 19 page Plotting Cthulhu Dossier helps you construct some truly nefarious Mythos plots set against the backdrop of World War Two. By looking at various inspirational film and television sources it hopes to show how you, the Keeper, can mine them for ideas for your own games. If you are still a bit stumped, there is a comprehensive plot generator to further aid you in your machinations plus a two...   [click here for more ] Modiphius   $1.00  

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Raiders of R’lyeh: Gamemaster’s Guide & Complete Rules Raiders of R’lyeh: Gamemaster’s Guide & Complete Rules
Raiders of R’lyeh: Gamemaster’s Guide & Complete Rules UPDATE:  RAIDERS OF R’LYEH: FROM THE TIDELESS SEA, our first big expansion (at 560 pages and in final layout) for RAIDERS of R’LYEH has launched! Follow the Kickstarter here: https://www.kickstarter.com/projects/1375282718/raiders-of-rlyeh-from-the-tideless-sea-epic-horror-sandbox SEE A PREVIEW HERE: http://raidersofrlyeh.com/img/ror-preview.pdf RAIDERS...   [click here for more ] Cipher Bureau   $39.99  

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Grammar Fuel: Horror Genre & Subgenres Grammar Fuel: Horror Genre & Subgenres
Grammar Fuel: Horror Genre & Subgenres Two PDFs —one with border pages internally (as shown in the sample pages) and one without border pages. Grammar Fuel: Horror Genre & Subgenres is an 82-page book of random noun, verb, adjective, and adverb d100 tables each for the Horror genre: horror, weird & cosmic horror, dark fantasy, gothic horror, witch, demon, vampire, ghost,...   [click here for more ] Ken Wickham   $12.99 $9.96  

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Cthulhu Live 3rd Edition (LARP) Cthulhu Live 3rd Edition (LARP)
Cthulhu Live 3rd Edition (LARP) This newest and best edition of Cthulhu Live includes a richly detailed and uniquely playable rules system that incorporates decades of best practices and refinements from hundreds of gamers worldwide. Features of this self-contained live-action roleplaying game include:  All-new rules for skills, combat, Sanity, Magic, and Psychic powers. Extensive information on organizing events, stagecraft...   [click here for more ] Skirmisher Publishing   $9.99  

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1920s Investigator's Companion 1920s Investigator's Companion
1920s Investigator's Companion An Essential Guide for Players When faced with the horrors of the Cthulhu Mythos, investigators need all the help that they can get. This essential player's aid for Call of Cthulhu provides it. The 1920s Investigator's Companionis split into four sections. "The Roaring Twenties" details life in the 1920s, from a general historical overview to listing of favorite songs, books, and films...   [click here for more ] Chaosium   $8.95  

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Odd Soot Odd Soot
Odd Soot Science Fiction Mystery in the 1920s Humanity has reached the stars   An alien plague without a cure threatens civilisation   Only a few tragic heroes can save mankind      Odd Soot is a roleplaying game of mystery and investigation set on an alternate Earth in the 1920s. Mankind has travelled into space and found alien civilisations....   [click here for more ] FrostByte Books   $14.95  

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Hideous Creatures: A Bestiary of the Cthulhu Mythos Hideous Creatures: A Bestiary of the Cthulhu Mythos
Hideous Creatures: A Bestiary of the Cthulhu Mythos Lovecraft created his various “shadowy congeners” because the stories of vampires, werewolves, and even ghosts had become too familiar and too formulaic to evoke true horror. Almost a century after he wrote, his own monstrous races have likewise begun to seem like comfortable story furniture rather than unnerving signals that the world is horrible and wrong. In Hideous Creatures: A Bestiary...   [click here for more ] Pelgrane Press   $24.95  

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CTHULHU: Grundregelwerk Edition 7 CTHULHU: Grundregelwerk Edition 7
CTHULHU: Grundregelwerk Edition 7 CTHULHU Edition 7 Horror in den Welten des H. P. Lovecraft Lange vor dem Aufstieg der Menschheit herrschten die Großen Alten über die Erde. Die Spuren ihrer zyklopischen Städte sind noch immer auf abgelegenen Inseln, vergraben im Wüstensand und unter dem Polareis zu finden. Einst kamen sie von den Sternen auf unsere Welt. Jetzt schlafen sie, manche weit unter der Erdoberfläche...   [click here for more ] Pegasus Press   $21.69  

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Chaosium Inc. News

  • Graveyards of Arkham Episode Three - watch now on YouTube!
    Episode three of our blockbuster Call of Cthulhu actual play series...
  • Horror on the Orient Express: The Board Game Design Diary #5 – The train itself is an essential element
    Call of Cthulhu's Horror on the Orient Express has long...
  • Out now for Call of Cthulhu - our long awaited and eagerly anticipated Arkham book
    UNVEIL THE SECRETS OF THE LEGEND-HAUNTED CITYCall of Cthulhu: Arkham...
  • Death's Champion awaits in your first campaign for Pendragon! The Grey Knight is out in April.

    Death's Champion awaits in your first campaign for Pendragon! Releasing alongside...
  • Pendragon Core Rulebook releases in April
    Your journey as a knight in the time of King...
  • Latest Suppliments


    Publisher: Skirmisher Publishing This very special thematic bundle contains more than a dozen titles that can be used to play or enhance games set in the Mythic North! They include our Platinum-bestselling ...More...

    Publisher: Demons & Dungeoneers Gamebooks This special bundle product contains the following titles. Demons & Dungeoneers! Character Sheet (Cilihgin Longsmigh)Regular price: 0Bundle price: 0Format: PDF Cilihgin Longsmigh had never thought of leaving the Mystic ...More...

    Publisher: Arkenstone PublishingThe Workbook Partials are excerpts from the campaign notes of our ongoing “Coup de Main” old school D&D campaign. Raw transcripts intended for experienced fellow travelers. Issue ...More...

    Publisher: James GrammaticusThis special bundle product contains the following titles.Defy the Legends Character SheetsRegular price: 0Bundle price: 0Format: PDF Defy the Legends Character Sheets! Use these to venture forth and Defy ...More...

    Publisher: James GrammaticusThis special bundle product contains the following titles.Defy the Legends Character SheetsRegular price: 0Bundle price: 0Format: PDF Defy the Legends Character Sheets! Use these to venture forth and Defy ...More...

    Publisher: James GrammaticusThis special bundle product contains the following titles.Defy the Legends Character SheetsRegular price: 0Bundle price: 0Format: PDF Defy the Legends Character Sheets! Use these to venture forth and Defy ...More...

    Publisher: Fainting Goat GamesBecause YOU demanded them! Paper minis of transforming robots for your Valor Knights RPG (or any other game where they'd blend in.) This pdf contains minis ...More...

    Publisher: Frontier GamingHOW TO PLAY In this Solo Adventure you assume the role of an adventurer in a Medieval Fantasy setting. You will  require The Dark Age: Legends Core ...More...

    Publisher: Oasis Sage1d100 Loot Tables for the Apocalypse - Abandoned Farms A d100 loot table for whatever scavenging survivors might find in an abandoned farm. Please note: The "Apocalypse" series loot ...More...

    Publisher: TellestThis temple,at the bottom of a deep sinkhole, has held up remarkably well despite its age.  It appears to have been constructed intentionally in the cavern below, ...More...