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

  • It's exactly one month until Chaosium Con in Ann Arbor - and you can still get a badge!

    Chaosium Con takes place in Ann Arbor MI in exactly...
  • Graveyards of Arkham episode Six - watch now on YouTube!
    The sixth and final episode of our blockbuster Call of...
  • Graveyards of Arkham is a wrap - thank you to the talented cast and crew... and our Kickstarter backers
    Earlier today (or yesterday, depending on your time zone) the...
  • Chaosium Con Ann Arbor Update: Graveyards of Arkham's Josephine McAdam is a special guest!

    One of the stars of our currently-showing blockbuster actual play...
  • A tribute to Arkham Unveiled's Keith Herber on the 15th anniversary of his passing

    -- Keith Herber (January 3, 1949 – March 13, 2009) --Today...
  • Latest Suppliments

    Publisher: Angela Maps OSSUARY MAP PACK It’s over 9000!!! Bones, that is, meticulously arranged in this fascinating ossuary where the dead lie more or less peacefully. Amidst the the tombs ...More...

    Publisher: Chaosium"This is it - the case that will turn our fortunes around!"  Cries Mike Taggart, as he hands you an Adair Company telegram that smells faintly of a ...More...

    Publisher: Doppelgänger Publishing1' INTO SPACE The Trooper Want interstellar adventure without leaving your seat? 1' into space turns every journey into a galactic saga. Step into the shoes of a Star ...More...
    Publisher: Alpha Strike Games Limited This is a set of six colour tile maps, each 14x20 tiles. Two ships, three decks each. Each deck is split into quarters over ...More...

    Publisher: Rogue Gallery PublishingA tavern nestled in the woods holds a dark secret that will push the morals of your players. This adventure can be thrown in to any ...More...

    Publisher: Alex FouacheEn marge de la Vallée des Dragons, une dragonne du nom de Var’Zahiel vit seule au fond de la Vallée des Cachettes, protégeant fièrement son œuf ...More...

    Publisher: Don't Panic GamesPour tous les geeks en herbe ! Les héros aussi apprennent à colorier ! Au fil des pages, les différents coloriages sont associés au monde de l’aventure ...More...

    Publisher: Don't Panic GamesFabula Ultima est un jeu de rôle sur table inspiré des JRPG, les jeux vidéo RPG japonais. Dans Fabula Ultima, vos amis et vous écrivez l’histoire épique ...More...

    Publisher: Hobby Japan「ラストクロニクル」のフィフスエディションRPG用データ集第1弾 本書は対戦型カードゲーム「ラストクロニクル」を元にした「フィフスエディションRPG」用キャラクター・データ集だ。「ラストクロニクル」に登場した種族やクラスを持ったキャラクターを作成するためのデータがフルカラーイラストとともに収録されている。vol.01では以下の内容を収録している:・3つの種族データ オートマタ、ダークエルフ、獣人(ワータイガー、ワージャガー、ワーウルフ)・4つのサブクラス ファイターの戦士の類型「オーラ剣士」 ローグの類型「トレジャーハンター」 ソーサラーの魔力の起源「雷の起源」 ドルイドの円環「ソウルストーンの円環」本書のデータで遊ぶためには『フィフスエディションRPG コア・ルール』をはじめとした、第5版RPGに対応するルールブックが必要だ。 Price: $3.35 ...More...

    Publisher: Hobby Japanラストクロニクル 公式ハンドブック全15冊+αのPDFデータセット 対戦型トレーディングカードゲーム『ラストクロニクル』公式ハンドブック全15冊+αがPDFデータ版で復活!TCG版や『ラストクロニクル インフィニティ』のファンにはメモリアルアーカイブとして、また『フィフスエディションRPG ソースブック ラストクロニクル5E』のワールド設定資料として活用できる。このセットには以下の内容が含まれます:・ラストクロニクル 始まりの刻音 公式ハンドブック・ラストクロニクル 英魂の讃歌 公式ハンドブック・ラストクロニクル 災禍を討つ者 公式ハンドブック・ラストクロニクル 救世の交響詩 公式ハンドブック・ラストクロニクル 神理の激突 公式ハンドブック・ラストクロニクル 聖暦の覇者 公式ハンドブック・ラストクロニクル 天空編I 公式ハンドブック・ラストクロニクル 天空編II 公式ハンドブック・ラストクロニクル 天空編III 公式ハンドブック・ラストクロニクル 天空編IV 公式ハンドブック・ラストクロニクル 陽光編I 公式ハンドブック・ラストクロニクル 陽光編II ...More...