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- Macho Women with Guns by Blacksburg Tactical Research Center
- Malls and Morons indie publication by Orion Cooper - "Silly modern role-playing in the malls of America"
- Maelstrom by Puffin Books
- Mage: The Ascension by White Wolf Publishing - set in the original World of Darkness
- Mage: The Awakening by White Wolf Publishing - set in the new World of Darkness 2.0
- M.A.G.U.S. (Hungarian)
- Maji by Wasteland Games - modern-day alien conspiracy game
- Man, Myth & Magic by Yaquinto - RPG drawing on 4000 B.C. to 1000 A.D. Earth legends
- Marvel Super Heroes Role-Playing Game by TSR, Inc.
- Marvel Universe Roleplaying Game by Marvel Publishing Group
- Masterbook
- Mecha - a game based on Anime Mecha science fiction
- Mechamorphosis by Fantasy Flight Games
- Mechanical Dream
- The Mechanoid Invasion
- MechWarrior
- Mega - les Messagers Galactiques (French) - parallel universe
- Megaverse by Palladium Books
- Meikyu kingdom (Japanese) - members of tiny kingdom's court explore dungeons
- Mekton by R. Talsorian Games - based on Anime Mecha science fiction
- MERC by Fantasy Games Unlimited: A Modern Role Playing Game of Counter Insurgency
- Merc 2000 - Twilight 2000 updated for the post-Cold War '90s
- Mercenaries, Spies and Private Eyes by Flying Buffalo
- The Metabarons Roleplaying Game by West End Games
- Metal Magic and Lore by 5th Epoch Publishing
- Metamorphosis Alpha (1976)
- Middle Earth Role Play - based on the fantasy works of J. R. R. Tolkien
- Midgard - the oldest German fantasy RPG
- Miles Christi (French) - (Crusades and knights Templar)
- Millennium's End - by Chameleon Eclectic Entertainment
- Mind Games RPG - by Deiron e Yangsmoth
- The Modern Sagas - A Player's Guidebook for Ironwood Omnimedia Company's E-RPG System
- Mojo, by Polymancer Studios, Inc.
- Monastyr (Polish), Monastery by Portal
- The Monster Horror Show by James Herbert Brennan a very tongue in cheek basic fantasy role play system.
- The Morrow Project
- Mouse Guard
- Multiverser by E.R. Jones and M. Joseph Young
- Mummy: The Resurrection (original World of Darkness)
- Murphy's World by Peregrine Creative Services
- Mutant by Target Games
- Mutant: Undergångens Arvtagare by Järnringen Förlag AB
- Mutant RYMD
- Mutant Chronicles
- Mutants & Masterminds by Green Ronin Publishing
- My Life with Master by Half Meme Press
- Myrskyn aika by Mike Pohjola
- Mystic Realms
- Mystic Quests
Read more about this topic: List Of Role-playing Games By Name