Chaosium Inc. is one of the oldest publishers of role-playing games still in existence, established by Greg Stafford in 1975. Over the years Chaosium has published many acclaimed and award-winning games. These include the roleplaying games RuneQuest, set in Glorantha, and Call of Cthulhu, based on the stories of H.P. Lovecraft, which was published in 1982.
Many notable RPG authors have written material for Chaosium, including Steve Perrin, Sandy Petersen, Lynn Willis, Ken Rolston, Keith Herber, Charlie Krank, David Conyers, Ken St. Andre, Robin Laws, Jonathan Tweet, and David A. Hargrave.