| Mario 4 - Space Odyssey | RU | 2011 |
KDS | Unlicensed |
| Mario Andretti Racing | EU | 1994 |
Stormfront Studios | Commercial |
| Mario Andretti Racing | US | 1994 |
Stormfront Studios | Commercial |
| Mario Lemieux Hockey | EU | 1992-03 |
Sega of America | Commercial |
| Mario Lemieux Hockey | US | 1991 |
Sega of America | Commercial |
| Marko | US | 1994-10 |
Domark | Commercial |
| Marko's Magic Football | EU | 1994-07-21 |
Domark | Commercial |
| Marko's Magic Football | EU | 1994-06 |
Domark | Prototype |
| Marsupilami | EU | 1995-11 |
Sega Enterprises | Commercial |
| Marsupilami | US | 1995-10 |
Sega Enterprises | Commercial |
| Marvel Land | JP | 1991-06-28 |
Namco | Commercial |
| Marvel Land | US | 1991-10 |
Namco | Commercial |
| Marvel Land | US | 1991-06-28 |
Namcot | Prototype |
| Mary Shelley's Frankenstein | US | 1994-11-04 |
Sony Imagesoft | Commercial |
| Master of Monsters | JP | 1991-07-26 |
System Soft | Commercial |
| Master of Monsters | JP | 1991-07-26 |
System Soft | Prototype |
| Master of Monsters | US | 1991-12 |
System Soft | Commercial |
| Master of Weapon | JP | 1991-09-27 |
Taito | Commercial |
| Maten no Soumetsu | JP | 1993-12 |
Kodansha | Commercial |
| Math Blaster - Episode 1 | US | 1994-09 |
Western Technologies | Commercial |
| Mazin Saga | AS | 1993 |
Vic Tokai | Commercial |
| Mazin Saga | JP | 1993 |
Vic Tokai | Commercial |
| Mazin Saga | KR | 1993 |
Vic Tokai | Commercial |
| Mazin Saga - Mutant Fighter | US | 1993-10 |
Vic Tokai | Commercial |
| Mazin Wars | EU | 1993-07 |
Vic Tokai | Commercial |
| McDonald's Treasure Land Adventure | EU | 1994-03 |
Sega of America | Commercial |
| McDonald's Treasure Land Adventure | JP | 1993-09-23 |
Sega of America | Commercial |
| McDonald's Treasure Land Adventure | JP | 1993-09-23 |
Sega of America | Prototype |
| McDonald's Treasure Land Adventure | US | 1993-12 |
Sega of America | Commercial |
| Medal City | JP | 1991 |
Sega Enterprises | Commercial |
| Mega 6 Vol. 3 | EU | 1995 |
Sega Enterprises | Commercial |
| Mega Ataxx | WORLD | 2026-02 |
abadede919302 | Unlicensed |
| Mega Bomberman | EU | 1994-11-23 |
Sega of America | Commercial |
| Mega Bomberman | KR | 1994-11 |
Sega of America | Commercial |
| Mega Bomberman | US | 1994-10 |
Sega of America | Commercial |
| Mega Bomberman - Special 8-Player-Demo | EU | 1994-11-23 |
Sega | Prototype |
| Mega Casanova | WORLD | 2019 |
Gamedevelopment Community | Unlicensed |
| Mega Casanova 2 | WORLD | 2021 |
Tomahomae | Unlicensed |
| Mega Casanova 3 | WORLD | 2022 |
Tomahomae | Unlicensed |
| Mega Cheril Perils | WORLD | 2017-02 |
1985 Alternativo | Unlicensed |
| Mega Flappy Sis | WORLD | 2018-01 |
Beetroot | Unlicensed |
| Mega Games 2 | EU | 1993 |
Sega Enterprises | Commercial |
| Mega Games 3 | AS | 1993 |
Sega Enterprises | Commercial |
| Mega Games 3 | EU | 1993 |
Sega Enterprises | Commercial |
| Mega Games 6 | EU | 1995 |
Sega Enterprises | Commercial |
| Mega Games 6 Vol. 2 | EU | 1995 |
Sega Enterprises | Commercial |
| Mega Games I | EU | 1992-10 |
Sega Enterprises | Commercial |
| Mega Games I | US | 1992-10 |
Sega Enterprises | Commercial |
| Mega Man - The Sequel Wars - Episode Red | WORLD | 2023-05 |
| Unlicensed |
| Mega Man - The Wily Wars | EU | 1994-10 |
Capcom | Commercial |
| Mega Man - The Wily Wars | US | 1994-10 |
Capcom | Commercial |
| Mega Man - The Wily Wars | WORLD | 1994-10-21 |
Capcom | Commercial |
| Mega Man X | WORLD | |
| Demo |
| Mega Mindtris | WORLD | 2017-05 |
| Unlicensed |
| Mega Pang | WORLD | 2025-08 |
RCampeador | Prototype |
| Mega Platform Countdown | WORLD | 2025-08 |
abadede919302 | Unlicensed |
| Mega Q-bert | WORLD | 2016-12 |
Jaklub | Unlicensed |
| Mega R-Type | WORLD | 2023-11 |
| Demo |
| Mega SWIV | EU | 1995-03 |
Time Warner Interactive | Commercial |
| Mega Slow Mole | WORLD | 2023-10 |
SlowMoleStudio | Demo |
| Mega Turrican | EU | 1994-11 |
Data East | Commercial |
| Mega Turrican | JP | 1994-03 |
Data East | Prototype |
| Mega Turrican | US | 1994-06 |
Data East | Commercial |
| Mega Xmas '89 | WORLD | 2019-11 |
Bits and Pixel | Unlicensed |
| Mega lo Mania | JP | 1993-04-23 |
Virgin | Commercial |
| Mega-lo-Mania | EU | 1993-04 |
Virgin | Commercial |
| Mega-lo-Mania | EU | 1993-04 |
Virgin | Prototype |
| Mega-lo-Mania | FR | 1993-03 |
Virgin | Commercial |
| Mega-lo-Mania | WORLD | 1993-03 |
Virgin Games | Commercial |
| MegaMind | JP | 1991-04 |
Sega Enterprises | Commercial |
| MegaPanel | JP | 1990-11-22 |
Namco | Commercial |
| MegaSurvivor | WORLD | 2025-02 |
Hanamaman | Unlicensed |
| MegaTrax | JP | 1991-08-06 |
Namco | Commercial |
| Megapong | WORLD | |
| Unlicensed |
| Megarunner | WORLD | 2020-01 |
and0 | Unlicensed |
| Meka Grappler X | WORLD | 2017-04 |
Sik | Unlicensed |
| Menacer - 6-Game Cartridge | EU | 1992-11-19 |
Western Technologies | Commercial |
| Menacer - 6-Game Cartridge | US | 1992-10 |
Western Technologies | Commercial |
| Menghuan Moni Zhan | CN | |
| Unlicensed |
| Menghuan Moni Zhan 2 | CN | |
| Unlicensed |
| Menghuan Shuiguo Pan - 777 Casino | TW | 1991 |
City Man Technology | Unlicensed |
| Menghuan Zhi Xing III | CN | |
| Unlicensed |
| Mengnake Huangzu - Zuizhong Zhandou Chuanshuo | CN | 1994-06 |
| Unlicensed |
| Mercs | WORLD | 1991-09-27 |
Capcom | Commercial |
| Merry Xmas | WORLD | |
| Prototype |
| Metal Blast 2277 | WORLD | 2019-11 |
Timur Lyazgiev | Unlicensed |
| Metal Fangs | JP | 1993-12-17 |
Sega | Commercial |
| Metal Gear | WORLD | 2025-05 |
H0ffman | Unlicensed |
| Metal Slug | WORLD | |
| Prototype |
| Metal Slug Warfare | WORLD | 2021-12 |
Studio Vetea | Demo |
| Michael Jackson's Moonwalker | JP | 1990-08-25 |
Sega of America | Commercial |
| Michael Jackson's Moonwalker | JP | 1990-08-25 |
Sega of America | Prototype |
| Michael Jackson's Moonwalker | US | 1990-09 |
Sega of America | Commercial |
| Michael Jackson's Moonwalker | US | 1990-09 |
Sega of America | Prototype |
| Michael Jackson's Moonwalker | WORLD | 1990-08-25 |
Sega of America | Commercial |
| Mick & Mack as the Global Gladiators | US | 1992-11 |
Virgin | Commercial |
| Mick & Mack as the Global Gladiators | US | 1992-11 |
Virgin | Prototype |
| Mickey Mania | EU | 1994-11 |
Sony | Commercial |
| Mickey Mania - The Timeless Adventures of Mickey Mouse | JP | 1995-03-31 |
Sony | Commercial |
| Mickey Mania - The Timeless Adventures of Mickey Mouse | US | 1994-11-01 |
Sony | Commercial |