Chaosium

Chaosium is a publisher who has published at least 10 editions.

Michael Moorcock's Stormbringer: Fantasy Roleplaying in the World of Eric
The Hastur Cycle
Singers of Strange Songs: A Celebration of Brian Lumley
The Disciples of Cthulhu
The Dunwich Cycle: Where the Old Gods Wait
The Nyarlathotep Cycle: The God of a Thousand Forms
Cthulhu's Heirs: New Cthulhu Mythos Fiction
The Shub-Niggurath Cycle: Tales of the Black Goat with a Thousand Young
The Cthulhu Cycle: Thirteen Tentacles of Terror
Made in Goatswood