| Microsoft XBOX disc |  Metal Arms - Glitch in the System | 2003 | Unknown |
| Nintendo GameCube disc |  Metal Arms - Glitch in the System Model DOL-GM5D-NOE | 2003 | Sierra Ent., Inc. USA |
| Nintendo GameCube disc | Metal Arms - Glitch in the System Model DOL-GM5E-USA | 2003 | Sierra Ent., Inc. USA |
| Sony PlayStation CD |  Metal Gear Solid Integral Model SLPM-87324~6 | 2003 | Konami Corp. Japan |
| Nintendo GBA cart. | Metal Max 2 Kai Model AGB-A9TJ-JPN | 2003 | Now Production |
| Sony PlayStation 2 disc | Metal Slug 3 Model SLPS-25209 P | 2003 | Playmore Corp. Japan |
| Arcade Video game | Metal Slug 5 Model 2680 | 2003 | SNK Playmore Japan |
| SNK Neo-Geo MVS cart. | Metal Slug 5 Model NGM-268 | 2003 | SNK Playmore Japan |
| Sony PlayStation CD | Metal Slug X Model SLES 03575 | 2003 | Agetec, Inc. Sunnyvale, CA, USA |
| Nintendo GBA cart. | Metroid Fusion Model AGB-AMTJ-JPN | 2003 | Nintendo Co., Ltd. Japan |
| Nintendo GameCube disc | Metroid Prime Model DOL-GM8J-JPN | 2003 | Nintendo Co., Ltd. Japan |
| Pachislot | Michinoku Ichiban | 2003 | Heiwa Japan |
| Nintendo GameCube disc | Micro Machines | 2003 | Infogrames Europe 546430 |
| Nintendo GBA cart. | Micro Machines Model AGB-AXZP-EUR | 2003 | Atari Interactive, Inc. |
| PC/MS-Windows CD | Microsoft Flight Simulator 2004 - Century Of Flight | 2003 | Microsoft |
| Microsoft XBOX disc | Midnight Club II | 2003 | Unknown |
| Slot Machine | Midnight Madness CG Maxi Cabinet model | 2003 | Compu-Games A.S. Esbjerg, Denmark |
| Slot Machine | Midnight Madness CG Mini Cabinet model | 2003 | Compu-Games A.S. Esbjerg, Denmark |
| Slot Machine | Midnight Madness CG Unique Cabinet model | 2003 | Compu-Games A.S. Esbjerg, Denmark |
| Microsoft XBOX disc | Midtown Madness 3 | 2003 | Unknown |
| Microsoft XBOX disc | Midway Arcade Treasures | 2003 | Midway Home Ent. |
| Nintendo GameCube disc | Midway Arcade Treasures Model DOL-GAKE-USA | 2003 | Midway Home Ent. |
| Sony PlayStation 2 disc | Midway Arcade Treasures Model SLUS-20801 | 2003 | Midway Home Ent. |
| Slot Machine | Mild to Wild | 2003 | WMS Gaming, Inc. Chicago, IL, USA |
| PC/MS-Windows CD | Milk | 2003 | Blue Gale |
| Slot Machine | Million Dollar Chase | 2003 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | Million Dollar Smile | 2003 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | Million Dollar Voice | 2003 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | Millionaire's Zone | 2003 | WMS Gaming, Inc. Chicago, IL, USA |
| PC/MS-Windows pack. | Milman | 2003 | Empas Korea |
| Pachislot | Minami no Teiou | 2003 | Baltec Japan |
| PC/MS-Windows CD | Mind Reaper | 2003 | Janis Computer Soft., Inc. Japan |
| Slot Machine | Mine magic | 2003 | Konami Corp. Japan |
| Timex Sinclair 2068 cass. | Minesweeper Hb | 2003 | Albrecht, Alvin |
| IBM PC/AT DOS pack. | Minesweeper | 2003 | Dunfield, Dave |
| Sega Pico game | Mini Moni. - Eigo de Asobundapyon! Model HPC-6122 | 2003 | SEGA Toys |
| Sega Pico game | Mini Moni. - Shougakkou he Iku Ndapyon! | 2003 | SEGA Toys |
| Slot Machine | Minimania | 2003 | IGT International Game Technologies Reno, NV, USA |
| Sony PlayStation CD | Minna Atsumare! Igo Kyoushitsu Model SLPS-03554 | 2003 | I.Magic Japan |
| Sony PlayStation CD | Minna Atsumore! Igo Kyoushitsu Model SLPS-03554 | 2003 | Silver Star Japan |
