| Id | Name | Systems | Actions |
|---|---|---|---|
| 835 | Magnetica | DS | |
| 3043 | Mahjong Fight Club DS | DS | |
| 3195 | Mahoujin Guruguru | SNES | |
| 1349 | Majou Densetsu II: Daimashikyou Galious | NES | |
| 1798 | Majyuuou | SNES | |
| 2741 | Makaimura for WonderSwan | WSWAN | |
| 1955 | Mamono Hunter Youko: Dai 7 no Keishou | Genesis | |
| 84 | Maniac Mansion | NES | |
| 928 | Manic Miner | GBA | |
| 3453 | Manic Miner | ZXS | |
| 1761 | Mappy | NES | |
| 2910 | Mappy | GG | |
| 130 | Marble Madness | Genesis | |
| 158 | Marble Madness | NES | |
| 3782 | Marble Madness II | Arcade | |
| 2963 | Marchen Maze | PCE | |
| 2079 | Mari0 | Linux | |
| 4 | Mario & Luigi | DOS | |
| 2180 | Mario & Luigi: Bowser's Inside Story | DS | |
| 1959 | Mario & Luigi: Partners in Time | DS | |
| 1177 | Mario & Luigi: Superstar Saga | GBA | |
| 3205 | Mario & Wario | SNES | |
| 1767 | Mario 3: Around the World | Genesis | |
| 1768 | Mario 4: Space Odyssey | Genesis | |
| 254 | Mario Adventure | NES |