One of his first contributions to the world of RPGs was "The Perrin Conventions" in 1976, an alternative set of combat rules for Dungeons & Dragons, which led to his work on RuneQuest.[3]: 83 [4] Perrin wanted more involvement in the role-playing game industry, and with Jeff Pimper he talked to Chaosium about developing a creature book based on Dungeons & Dragons, which they published as All the Worlds' Monsters (1977), and was released before the Monster Manual from TSR.[3]: 83 Perrin later worked with Steve Henderson and Warren James on an idea for an original gaming system to be used with the world of Glorantha after a previous design team failed to produce a supplement to an existing game, and Ray Turney from the original team soon joined them; this new RPG was finally published in 1978 as RuneQuest.[3]: 83
Perrin officially joined Chaosium in 1981, although he only stayed with the company for a few years.[3]: 83–84 He was one of several authors who contributed to their licensed Thieves' World (1981) supplement.[3]: 85 Perrin designed Worlds of Wonder (1982), which was the third game released by Chaosium using their Basic Role-Playing system (BRP).[3]: 86 Superworld was originally one of worlds designed for Worlds of Wonder and was then published as its own game in 1983, although it was merely moderately successful and Perrin later admitted its similarity to Champions from Hero Games.[3]: 87 In 1984 he wrote the BRP based Elfquest, based on the Elfquest comic book.[3]: 87 While at Chaosium he also created Stormbringer, and contributed to Call of Cthulhu.
Later career
Hero Games published its sixth RPG, Robot Warriors (1986), by Perrin.[3]: 147 He also wrote the 1987 Champions role-playing game supplement The Voice of Doom.
