Later career
Hero Games published its sixth RPG, Robot Warriors (1986), by Perrin. : 147 He also wrote the 1987 Champions role-playing game supplement The Voice of Doom.
He worked at Interplay Productions, Maxis, and Spectrum Holobyte, doing game design, playtesting, and writing manuals for such computer games as Mechanized Assault & Exploration, Star Trek: Starfleet Academy, and Descent to Undermountain. He has also worked freelance for many of the major players in the games industry including TSR, FASA, Hero Games, West End Games, and Iron Crown Enterprises.
Steve Perrin's Quest Rules (SPQR) was sold independently through Chaos Limited. In 2004, he collaborated with Taldren on Black 9 Ops, which Perrin decided to make available for free.
In 2010, Perrin began creating PDF adventures for the games Icons and Mutants & Masterminds, and completed several scenarios for Vigilance Press and Fainting Goat Press. In 2019, he returned to Chaosium as a creative consultant. In 2020, he contributed to the Wild Cards novel American Hero.[citation needed]
On August 13, 2021, Chaosium announced Perrin's death.