Chaosium

Chaosium Inc. is a publisher of tabletop role-playing games established by Greg Stafford in 1975. Chaosium's major product lines include RuneQuest, set in Stafford's fictional world of Glorantha; Call of Cthulhu, based on the horror fiction stories of H. P. Lovecraft; Pendragon, based on Thomas Mallory's Le Morte d'Arthur; and 7th Sea, "swashbuckling and sorcery" set in a fantasy 17th-century Europe.