| Tomy Evio cart. |  Minna no Evio Model eM17 | 2003 | Tomy |
| Nintendo GBA cart. | Minna no Ouji-sama Model AGB-BMOJ-JPN(RK338-J1) | 2003 | Konami Corp. Japan |
| Nintendo GBA cart. | Minna no Shiiku Series - Boku no Kabuto, Kuwagata Model AGB-BKKJ-JPN | 2003 | MTO, Inc. Japan |
| Nintendo GBA cart. | Minna no Soft Series - Hyokkori Hyoutan-jima - Don Gabacho Daikatsuyaku no Maki Model AGB-BHYJ-JPN | 2003 | MTO, Inc. Japan |
| Nintendo GBA cart. | Minna no Soft Series - Minna no Mahjong Model AGB-BMJJ-JPN | 2003 | MTO, Inc. Japan |
| Nintendo GBA cart. | Minna no Soft Series - Shanghai Model AGB-BSHJ-JPN | 2003 | Success Japan |
| Nintendo GBA cart. | Minna no Soft Series - Tetris Advance Model AGB-BTTJ-JPN | 2003 | Success Japan |
| Nintendo GBA cart. | Minna no Soft Series - Zooo Model AGB-BMZJ-JPN | 2003 | Success Japan |
| Pachislot | Miracle Bomber | 2003 | Abilit Japan |
| Pachinko | Miracle Magic | 2003 | Sanyo Japan |
| Sony PlayStation CD |  Miracle Space Race Model SLES-04057 | 2003 | Midas Int. Ent. |
| Sony PlayStation CD | Miracle Space Race Model SLUS-01556 | 2003 | Mud Duck Productions |
| Sega Dreamcast GD |  Miss Moonlight Model T-18702M-1 | 2003 | Naxat Soft. Japan |
| Microsoft XBOX disc | Mission - Impossible - Operation Surma | 2003 | Unknown |
| Nintendo GBA cart. | Mission Impossible - Operation Surma Model AGB-AIHE-USA | 2003 | Atari Interactive, Inc. |
| Nintendo GBA cart. | Mission Impossible - Operation Surma Model AGB-AIHP | 2003 | Atari Interactive, Inc. |
| PC/MS-Windows CD | Mistmare | 2003 | Strategy First |
| Pachinko | Miyamoto Musashi | 2003 | Newgin Japan |
| Arcade Video game | MJ | 2003 | SEGA Corp. |
| Pachislot | MJ - Magic Jack | 2003 | Abilit Japan |
| Arcade Video game | MJ2 GDX-0006 | 2003 | SEGA Corp. |
| Sony PlayStation CD | MLB 2004 Model SCUS-94689 | 2003 | Sony Computer Ent. America SCEA CA, USA |
| Nokia N-Gage card | MLB Slam! | 2003 | T-HQ Wireless, Inc. |
| Nintendo GameCube disc | MLB SlugFest 20-04 | 2003 | Midway Home Ent. |
| Microsoft XBOX disc | MLB SlugFest 20-04 | 2003 | Unknown |
| Nintendo GBA cart. | MLB SlugFest 20-04 Model AGB-A5ME-USA | 2003 | Midway Home Ent. |
| Sony PlayStation CD | Mobile Light Force Model SLUS-01525 | 2003 | XS Games |
| Arcade Video game | Mobile Suit Z Gundam - AEUG Vs. Titan | 2003 | Capcom Co., Ltd. Japan |
| Slot Machine | Modern Life | 2003 | Subsino Co., Ltd. |
| Sega Dreamcast GD | Moekan Model T-46515M | 2003 | Princess Soft |
| Pachinko | Mohretsu Gaoo!! | 2003 | Newgin Japan |
| Microsoft XBOX disc | Mojo! | 2003 | Unknown |
| Slot Machine | Money | 2003 | WMS Gaming, Inc. Chicago, IL, USA |
| Slot Machine | Money Beans Classics | 2003 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | Money Bee Model CN9411-015 | 2003 | Dragon Co., Ltd. |
| Slot Machine | Money Madness | 2003 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | Money Works | 2003 | WMS Gaming, Inc. Chicago, IL, USA |
| Slot Machine | MoneyMoney | 2003 | AGI Austrian Gaming Industries Novomatic Group |
| Redemption game (mechanical) | Monopoly | 2003 | Stern Pinball, Inc. Melrose Park, IL, USA |
| Slot Machine | Monopoly - Cash Flow | 2003 | WMS Gaming, Inc. Chicago, IL, USA |
