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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 the company was founded as The Chaosium. In 1980 it was incorporated as Chaosium Inc. Chaosium thrives in the mild climate, gorgeous surroundings, and gentle earthquakes of the San Francisco Bay area.

The 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 the classic Call of Cthulhu roleplaying game line which has won so many awards that the 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 Call of Cthulhu Fiction collections.

In 2010, Chaosium celebrated our 35th anniversary and in 2011, Call of Cthulhu its 30th!

Chaosium

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Secrets

$8.95 $4.92
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Last Rites

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The Bermuda Triangle

$16.95 $9.32
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1990's Handbook

$12.95 $7.12
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Cthulhu Now

$21.95 $12.07
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A Resection of Time

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1990's Handbook

1990's Handbook


The ideas presented in this book attempt to be both mundane and fantastic at the same time— plausability is the key. 

It is in the details that the horror lies, because it is in the credibility of the details that the fantastic can rise and stand.

This, then, is a book of details, most mundane, some fantastic. They have but one purpose—that of bringing Lovecraft...   [click here for more]

Chaosium  $12.95 $7.12

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A Resection of Time

A Resection of Time


A Resection of Time is a short campaign for Call of Cthulhu set in the modern day. It begins in early April, in San Francisco, and ends a little later in the steamy jungles of Belize, in Central America. Before plunging into the dark heart of the ancient Mayan world, the investigators also travel to Los Angeles and shadowy Arkham.

The details of Mayan architecture, ...   [click here for more]

Chaosium  $11.95 $6.57

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Cthulhu Now

Cthulhu Now


CTHULHU NOW includes four roleplaying adventures, "The City in the Sea," The Killer Out of Space," The Evil Stars," and "Dreams Dark and Deadly." Background essays provide new skills and occupations, up-to-date cash-flow information, an elaborate firearms article (and a foldout illustrating contemporary firearms), active and passive night-vision equipment,...   [click here for more]

Chaosium  $21.95 $12.07

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Last Rites

Last Rites


Four challenging horrors for today. A book of wretched poetry, an incautious summoning, a Satanic coven, and a house with a suspicious history are the basic ingredients. Useful as stand-alone adventures, or for a change of pace when inserted into an ongoing campaign. Though suitable for beginning player characters, these adventures are dangerous, and incautious beginners will come to regret ras...   [click here for more]

Chaosium  $14.95 $8.22

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Secrets

Secrets


Call of Cthulhu: Secrets 

We all hold a few dark, deep secrets close to their hearts. Some of our secrets are small and would seem unimportant if they were exposed to the light of day. Others are big and could change the world. This book is about secrets that have been allowed to fester and darken in the shadows. What was hidden in Robert Monroe-Tylor's coffin? What horror left Jason Andr...   [click here for more]

Chaosium  $8.95 $4.92

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The Bermuda Triangle

The Bermuda Triangle


What secrets lie within the Devil’s Triangle? Why was the Mary Celeste abandoned after is passed through the Triangle's waters? What caused the disappearance of an entire flight of Avengers in 1945? Why do electronics fail in the Triangle for no reason?

Now the answeres at last can be revealed. The Bermuda Triangle is a 1990’s sourcebook centered around the...   [click here for more]

Chaosium  $16.95 $9.32

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Cthulhu Now

01.Cthulhu Now
02.A Resection of Time
03.1990's Handbook
04.Secrets
05.Last Rites
06.The Bermuda Triangle
 
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