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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, NPCs, Portuguese (and English) from Chaosium

 
 Newest Titles in This Section
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 Title    Publisher    Price  
All the Worlds' Monsters Vol. 1

All the Worlds' Monsters Vol. 1


This book is an encyclopedia of the strange, the bizaare, and the deadly. It contains complete statistics for 265 monstrous and dangerous creatures, created by dungeon masters across the United States and Canada. Each monster is rated for hit dice, armor class, movement, whether and how well it swims and flies, its intelligence range, dexterity, alignment, normal habitat, the probability of it being...   [click here for more]
Chaosium  $10.00 $5.50

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All the Worlds' Monsters Vol. 2

All the Worlds' Monsters Vol. 2


In its third printing, volume II of the ALL THE WORLDS’ MONSTERS series contains 243 creatures from literature, fantasy, and nightmare. Included is a conversion article by Ken St. Andre for TUNNELS & TROLLS, and Steve Perrin’s historic “Conventions.” Created by 54 DMs from across North America, each monster is rated for hit dice, armor class, movement, whether or how well...   [click here for more]
Chaosium  $10.00 $5.50

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All the Worlds' Monsters Vol. 3

All the Worlds' Monsters Vol. 3


Now! The long-wanted 3rd volume of the All the Worlds’ Monsters series is here-112 pages packed with monsters and play-aids. Included are 238 new monsters, an all-series index, a RuneQuest stats conversion essay by Steve Perrin, and grouping lists by monster type, level, and appearance. The stats were created by dungeon masters from across the United States and Canada. Each monster is rated for...   [click here for more]
Chaosium  $10.00 $5.50

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Casting Call of Cthulhu

Casting Call of Cthulhu


Modern-Day Non-Player Characters This is a collection of 120 Modern-Era NPCs for overworked keepers to use in their games and campaigns. These NPCs are ones typically found in society and can provide useful information, assistance, or adventuring opportunities for Investigators. All are complete with Statistics, skills, a physical description, and a brief, but highly individualized...   [click here for more]
Chaosium  $8.95

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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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Nephilim Gamemaster's Companion

Nephilim Gamemaster's Companion


Indespensible Resources for the Nephilim Gamemaster The secret history of the Nephilim, composing a timeline from the beginning of the universe to the end of the world as we know it. Rules for artifacts and sentient relics of amazing power. A bestiary of new elemental creatures. Gamemaster's advice on starting and running a Nephilim campaign. Advice on plotting...   [click here for more]
Chaosium  $14.95 $8.22

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Secrets of New York

Secrets of New York


The City that Never Sleeps During the day ships, barges, tugs, and pleasure boats ply New York’s bay and rivers, dashing beneath bridges and disgorging thousands of people upon the city's shores. Each brings hope and dreams of a new life. At night the city blazes with myriad lights, diamonds dazzling in buildings that scrape the sky. Music, food, dance, dark rituals, and clandestine...   [click here for more]
Chaosium  $12.95

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Secrets of San Francisco

Secrets of San Francisco


A 1920s Sourcebook for the City by the Bay In all of North America there is no more perfect intersection of climate, culture, and colorful history than San Francisco — the culmination of Manifest Destiny, the Golden Gate to the Pacific Ocean, and the treasure house of the wealth of the great California Gold Rush. Purged of her wild, anarchic past by a devastating earthquake and fire at the beginning...   [click here for more]
Chaosium  $13.95

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Ye Booke of Monsters

Ye Booke of Monsters


All About Monstres This volume contains dozens of new races and individual creatures for use with the Call of Cfhulhu roleplaying game. Included here are the following categories: Outer Gods, Elder Gods, Great Old Ones, Great Ones, Avatars, Servitor Races, Independent Races, Fabulous Creatures, and Unique Entities. These monstrous creations have been collected from fiction spanning...   [click here for more]
Chaosium  $10.95 $6.02

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Ye Booke of Monstres II

Ye Booke of Monstres II


All About Monstres This volume contains dozens of new races and individual creatures for use with the Call of Cthulhu roleplaying game. Included here are the following categories: Outer Gods, Elder Gods, Great Old Ones, Great Ones, Avatars, Servitor Races, Independent Races, Fabulous Creatures, and Unique Entities. These monstrous creations have been collected from fiction spanning...   [click here for more]
Chaosium  $11.95 $6.57

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