Michael Mearls is a writer and designer of fantasy role-playing games (RPGs) and related fiction.
Mearls is an alumnus of Dartmouth College. While at Dartmouth he was a member of Sigma Nu fraternity.
Mike Mearls wrote the adventure To Stand on Hallowed Ground/Swords Against Deception (2001) for Fiery Dragon Productions.:226 Mearls wrote the last product from Hogshead Publishing, a Warhammer adventure titled Fear the Worst (2002) that Hogshead released for free on the internet.:307 Mearls designed the game Iron Heroes (2005) for Malhavoc Press.:226 Mearls was hired in June 2005 as a designer by Wizards of the Coast. Mearls came to Wizards through the community of third-party d20 designers.:301 Mearls was a lead developer for Dungeons & Dragons R&D working on the new 4th Edition. Between the Orcus I and Orcus II design phases for fourth edition, Mearls spliced the encounter-power mechanics of fourth edition into Tome of Battle: The Book of Nine Swords (2006), then into process.:298 Andy Collins, Mearls, David Noonan, and Jesse Decker were part of Rob Heinsoo's "Flywheel" design team for the fourth edition of Dungeons & Dragons, and did the final concept work from May 2006 to September 2006, before the first books for the edition were written and playtested.:297 After Heinsoo was laid off in 2009, Mearls stepped up to become the new D&D Lead Designer.:301 Mearls and Bill Slavicsek designed the Castle Ravenloft Board Game (2010).:302