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Chaosium, (kay-OSS-ee-yum) is known for publishing high quality books & games, and for having a well-developed sense of fun.

In 1975 we were founded as The Chaosium. In 1980 we incorporated as Chaosium Inc. Chaosium thrives in the mild climate, gorgeous surroundings, and gentle earthquakes of the San Francisco Bay Area.

Our main office is in Hayward, located about half-way between San Francisco and San Jose. A short walk away is a very good micro-brewery (and one of the oldest!) and Charlie Krank’s home. Charlie is our president and resident BBQ expert.

Most of Chaosium's product lines are based upon literary sources. H.P. Lovecraft's 1920's horror fiction provides the basis of our classic Call of Cthulhu roleplaying game line which has won so many awards that we have lost count, though we do know that there are more than 70 of them. Mr. Lovecraft also provides the inspiration for our many Chaosium Fiction collections. We are now expanding our fiction offering to include other, related, genres.

 
 Hottest Horror, 3.x/d20/OGL, German (and English) from Chaosium

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 Title    Publisher    Price  
Gamemaster's Pack

Gamemaster's Pack


This essential supplement for the d20 edition of Call of Cthulhu contains the most important tables & rules synopses to make d20 Cthulhu game sessions easier & more enjoyable for the GM. Includes the 32 page adventure "The Lost temple of Yig", character sheets, NPC records, Monster Sheets, conversion notes between d20 Call of Cthulhu and the Classic Basic Roleplaying Call of Cthulhu,...   [click here for more]
Chaosium  $19.95 $10.97

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H.P. Lovecraft's Arkham

H.P. Lovecraft's Arkham


Unveiling the Legend-Haunted City "Behind everything crouched the brooding, festering horror of the ancient town . . . the changeless, legend-haunted city of Arkham, with its clustering gambrel roofs that sway and sag over attics where witches hid from the King's men in the dark, olden days of the Province.   It was always a very bad time in Arkham . . . ."  ...   [click here for more]
Chaosium  $28.95 $15.92

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Major Arcana

Major Arcana


Major Arcana are the Mysteries of the Tarot, the Paths to Agartha, and the Tribes of the Nephilim. This sourcebook includes the secret history, symbolism, alliances, and initiatory rituals of the 22 Nephilim Arcana. Major Arcana Features: Rules for astral travel, divination, meditation, magical correspondence, and other arcane techniques Over 30 new...   [click here for more]
Chaosium  $21.95 $12.07

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Secret Societies

Secret Societies


"It is useless to deny, because it is impossible to conceal, that a great part of Europe is covered with a network of these secret societies, just as the superficies of the earth is being covered with railroads." —Benjamin Disraeli, 14 July 1856 Since the fall of Atlantis, the secret societies have grown, due to Nephilim patronage or human ambition. Many of them have learned...   [click here for more]
Chaosium  $16.95 $9.32

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