Chaosium

Chaosium is one of the longer lived publishers of role-playing games still in existence. Founded by Greg Stafford, its first game was actually a wargame, White Bear and Red Moon, which later mutated into Dragon Pass and its sequel, Nomad Gods. White Bear and Red Moon is notable for containing the first published material about Glorantha, later used as the primary setting for the role-playing games RuneQuest, Hero Wars and HeroQuest. Chaosium is the publisher of Call of Cthulhu, based on the stories of H.P. Lovecraft.