Join our newsletter
for new products, special offers, and more!

Enter email address

Sell your stuff or turn those old games into new!

Click Here

Don't see what you're looking for? Create a Want List!

Click Here

Partner with the Knight!

Click Here


Chaosium, (Kay-Oss-Eum) 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 by Greg Stafford. It was later incorporated as Chaosium Inc. Chaosium thrives in the mild climate, gorgeous surroundings, and gentle earthquakes of the San Francisco Bay area.

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.

Michael Moorcock's popular Eternal Champion Swords & Sorcery novels form the foundation of the Stormbringer roleplaying game. Both Call of Cthulhu and Stormbringer use our Basic Roleplaying system which is alive and well despite many, many years of fun and insanity.

»  Book of Dark Wisdom Magazine
»  Call of Cthulhu - Adventures & Modules (Chaosium 1981-2001)
»  Call of Cthulhu - Adventures & Modules (Chaosium 2001-Present)
»  Call of Cthulhu Books/Novels (Chaosium)
»  Horror Novels (Chaosium)