| Title | Publisher | Year | Language | Documents |
|---|---|---|---|---|
| Magocracy | Joseph Rheaume | 2004 | English | Hints |
| Mansion, The | Tasman | 2004 | English | |
| Mansion, The | Nick Dablin | 2004 | English | |
| Melarkian, The | Paul Allen Panks |
2004 | English | Fixed game |
| Mingsheng | Deane Saunders | 2004 | English | Solution |
| Mission From Short | Jennifer Maddox, Jessica Knoch | 2004 | English | Solution, Map |
| Misterio en la Catedral | Josep Coletas Caubet | 2004 | Spanish | Solution, Map |
| Misterio en La Pinga Seca | Hachimorriac Juegos | 2004 | Spanish | |
| Moonglow | Dave Bernazzani | 2004 | English | |
| Mort Pour Seul Destin, La | FibreTigre | 2004 | French | Solution |
| Murder at the Aero Club | Penny Wyatt | 2004 | English | Solution |
| Mystic Castle | Paul Allen Panks |
2004 | English | Map |