| Mazooma Belle (v2.5) (MPU4 Video) | 1969 | BwB | v4mazbel | | 0.00 |
| Meadows Lanes | 1977 | Meadows Games, Inc. | medlanes | Sports / Bowling | 3.50 |
| Mecca Money (Union) (MPU4) | 1969 | Union | m4mecca | | 0.00 |
| Mechanized Attack (US) (clone of: mechatt) | 1989 | SNK | mechattu | | 0.00 |
| Mechanized Attack (World) | 1989 | SNK | mechatt | Shooter / Gun | 7.40 |
| Medal Mahjong Circuit no Mehyou [BET] (Japan) | 1992 | Nichibutsu / Kawakusu | mmehyou | Tabletop / Mahjong *Mature* | 0.00 |
| Medal Mahjong Gottsu ee-kanji [BET] (Japan) | 1991 | Nichibutsu | mjgottub | Tabletop / Mahjong *Mature* | 0.00 |
| Medal Mahjong Janjan Baribari [BET] (Japan) (clone of: janbari) | 1992 | Nichibutsu / Yubis / AV Japan | mjanbari | Tabletop / Mahjong *Mature* | 0.00 |
| Medal Mahjong Pachi-Slot Tengoku [BET] (Japan) | 1993 | Nichibutsu / AV Japan / Miki Syouji | pachiten | Tabletop / Mahjong *Mature* | 0.00 |
| Medalist (Project) (PROCONN) | 1969 | Project | pr_medl | | 0.00 |
| Medallion Job (Qps) (IMPACT) | 1969 | Qps | j6medal | | 0.00 |
| Medieval Madness (0.50) (clone of: mm_10) | 1997 | Williams | mm_05 | | 0.00 |
| Medieval Madness (1.0 Ultrapin) (clone of: mm_10) | 1999 | Williams | mm_10u | | 0.00 |
| Medieval Madness (1.0) | 1999 | Williams | mm_10 | | 8.33 |
| Medieval Madness (1.09) (clone of: mm_10) | 1999 | Williams | mm_109 | | 0.00 |
| Medieval Madness (1.09B) (clone of: mm_10) | 1999 | Williams | mm_109b | | 0.00 |
| Medieval Madness (1.09C Profanity) (clone of: mm_10) | 1999 | Williams | mm_109c | | 0.00 |
| Medusa | 1981 | Bally | medusa | | 0.00 |
| Meg Aaton | 1983 | Playmatic | megaaton | | 0.00 |
| Mega Blast (Japan) (clone of: megablst) | 1989 | Taito Corporation | megablstj | | 0.00 |