| Metropolis |
| Michael CLambino's Fundraiser |
| Michael Clambino's Bowling Night |
| Michael Clambino's Poker Night |
| Midsummer Mischief by Nathan Gribble, Steve Hatherley, Heidi Kaye and Paul Snow |
| Minions!!! by Rachel Hanover-O'Conner, Robert Vincent and Quentin Bourne |
| Mirror Mirror by Eva Schiffer, Megan Coppock and Quinn D |
| Mirror World |
| Miskatonic Archeological Expedition |
| Miskatonic Class Reunion |
| Miskatonic Class Reunion 2000 |
| Miskatonic University by Chaos League |
| Miss Mary Maypole and the Christmas Pudding Affair |
| Miss Maypole and the Case of the Wretched Admiral by Graham Arnold, Nickey Barnard, Natalie Curd, Clare Gardner, Abi Kirby and Sue L |
| Miss Maypole and the Christmas Pudding Affair by Graham Arnold, Nickey Barnard, Jon Cloutman-Green, Dream Cloutman-Green, Clare Gardner and Sue Lee |
| Missing Magic |
| Model United Nations: Balkans Crisis Council, June 1992 by Jacqueline Bryk |
| Modern Gods by Michael Oldziej and Kevin O'Connor |
| Modern Gods by Michael Oldziej and Kevin O'Connor |
| Molecules by Ana Clarke |
| Monday |
| Monkeys Monkeys Monkeys by Margaret "Mags" Simkins |
| Monster 4 Monster by Liz Decolvenaere and Abe Pressman |
| Monster Take My Heart by Tory Root |
| Monsterf*cker: Family Reunion by Halden Ingwersen |
| Monsterhearts by John Stavropolous, Terry Romero, James Stuart and Kira Magrann |
| Monsters Under the Bed by Azalea Weisblat |
| Monsters vs Monsters |
| Mont St. Michel by Scott David Gray and Sharon Tripp |
| Montage! |
| More Than Friendship |
| Morningstar, Texas by Dave Agnew and Martin Clyde |
| Mortality Machine |
| Mournful Their Mood by Ryan Hart |
| Moving Van |
| Mr Underhill: a game about hobbits by Oleg Roderick and Vadim Ingwall Baranovsky |
| Much ado about something by Alan Schwartz. |
| Multiplied Loyalties |
| Muppet Purgatory by Beth Baniszewski, Diane Christoforo, William Lowenthal, Beth Baniszewski, Diane Christoforo and William Lowenthal |
| Muppets! The Larp by Prema Cottingham |