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Chaosium Inc.

About Us

Chaosium, (kay-OSS-ee-yum) is known for publishing high quality books and games, and for having a well-developed sense of fun. In 1975 the company was founded as The Chaosium by Greg Stafford, visionary game designer and creator of the world of Glorantha and the Pendragon roleplaying game, among others. 

Most of Chaosium's product lines are based upon literary sources. H.P. Lovecraft's 1920's horror fiction provides the basis of Sandy Petersen's 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 80 of them. Mr. Lovecraft also provides the inspiration for many of the books in our Chaosium Fiction line. We also publish Basic Roleplaying, the core of our roleplaying game systems, and hundreds of game supplements, both in print and downloadable formats.

In July 2015, the four principals of Diana Jones Award-winning Moon Design Publications joined the Chaosium ownership and management team. Chaosium again became the licensed publisher for RuneQuest, HeroQuest and other products related to Gloranthan universe. Greg and Sandy remain on the company board (Greg as Chair), and are creative consultants to the company.

In 2015, Chaosium celebrated our 40th anniversary and in 2016, Call of Cthulhu celebrates its 35th and the World of Glorantha its 50th!