 | Mechanized Attack (World) | 1989 | SNK | mechatt | Shooter / Gun | 7.40 |
| | Mega Blast (Japan) (clone of: megablst) | 1989 | Taito Corporation | megablstj | | 0.00 |
| | Mega Blast (US) (clone of: megablst) | 1989 | Taito America Corporation | megablstu | | 0.00 |
| | Mega Blast (World) | 1989 | Taito Corporation Japan | megablst | | 7.25 |
| | Mega-Tech | 1989 | Sega | megatech | BIOS | 6.57 |
 | Meta Fox | 1989 | Seta | metafox | Shooter / Flying Vertical | 7.00 |
 | Midnight Resistance (bootleg with 68705) (clone of: midres) | 1989 | bootleg | midresb | | 0.00 |
| Midnight Resistance (Japan) (clone of: midres) | 1989 | Data East Corporation | midresj | Platform / Shooter Scrolling | 0.00 |
| Midnight Resistance (US) (clone of: midres) | 1989 | Data East USA | midresu | Platform / Shooter Scrolling | 0.00 |
| Midnight Resistance (World) | 1989 | Data East Corporation | midres | Platform / Shooter Scrolling | 6.89 |
 | Millipede Dux (hack) (clone of: milliped) | 1989 | hack (Two-Bit Score) | millipdd | | 0.00 |
 | Miss Mahjong Contest (Japan) | 1989 | Nichibutsu | mcontest | Tabletop / Mahjong *Mature* | 0.00 |
| | Monday Night Football (2.7, 50cts) | 1989 | Data East | mnfb_c27 | | 0.00 |
| | Mousin' Around! (LA-1) (clone of: mousn_l4) | 1989 | Bally | mousn_l1 | | 0.00 |
| | Mousin' Around! (LA-4) | 1989 | Bally | mousn_l4 | | 0.00 |
| | Mousin' Around! (LU-1) (clone of: mousn_l4) | 1989 | Bally | mousn_lu | | 0.00 |
| | Mousin' Around! (LX-1) (clone of: mousn_l4) | 1989 | Bally | mousn_lx | | 0.00 |
 | Ms. Pac-Man Heart Burn (clone of: mspacman) | 1989 | hack (Two-Bit Score) | msheartb | | 0.00 |
 | MVP (set 1, Japan, FD1094 317-0142) (clone of: mvp) | 1989 | Sega | mvpj | Sports / Baseball | 0.00 |
| MVP (set 2, US, FD1094 317-0143) | 1989 | Sega | mvp | Sports / Baseball | 7.64 |
