| PC/MS-Windows CD |  Milk 2 | 2004 | Blue Gale |
| Mattel Intellivision cart. | Minehunter Model 9113 | 2004 | IntelligentVision |
| Sony PSP UMD | Minna no Golf Portable | 2004 | Sony Computer Ent., Inc. SCEI Japan |
| Nintendo GBA cart. | Minna no Soft Series - Minna no Shougi Model AGB-BSGJ-JPN | 2004 | Success Japan |
| Slot Machine | Miracle-N | 2004 | Unknown Korea |
| PC/MS-Windows CD | Missing - The 13th Victim | 2004 | Ubisoft Ent. Montreuil sous Bois, France |
| Nintendo GameCube disc | Mission Impossible - Operation Surma | 2004 | Atari, Inc. NY, USA |
| Nintendo GameCube disc | Mission Impossible - Operation Surma | 2004 | Atari Europe S.A.S.U. |
| Pachislot | Miyabi | 2004 | EMA Japan |
| Pachislot | Miyamoto Musashi | 2004 | Aruze Corp. Japan |
| Sony PlayStation CD | MLB 2005 Model SCUS-94692 | 2004 | Sony Computer Ent. America SCEA CA, USA |
| Medal game (video) | MLB Golden Glove | 2004 | Unknown Korea |
| Microsoft XBOX disc | MLB SlugFest Loaded | 2004 | Unknown |
| Nintendo GameCube disc | Mobile Suit Gundam - Gundam vs. Zeta Gundam | 2004 | Bandai Co., Ltd. Japan |
| Nintendo GBA cart. |  Mobile Suit Gundam Seed - Battle Assault Model AGB-BGNE-USA | 2004 | Bandai America, Inc. 45557 |
| Arcade Video game | Mobile Suit Z Gundam - AEUG Vs. Titan DX | 2004 | Capcom Co., Ltd. Japan |
| Takara e-Kara cart. | Model EN-3 | 2004 | Takara Co., Ltd. Japan |
| Medal game (video) | Modern King Gold 1 | 2004 | Yeo Myung Electronic Co., Ltd. Korea |
| Medal game (video) | Modern King Gold 2 | 2004 | Yeo Myung Electronic Co., Ltd. Korea |
| Medal game (video) | Modern King Gold III | 2004 | Yeo Myung Electronic Co., Ltd. Korea |
| Medal game (video) | Modern King Gold IV | 2004 | Yeo Myung Electronic Co., Ltd. Korea |
| Nintendo GBA cart. | Moero!! Jaleco Collection Model AGB-BJCJ-JPN | 2004 | JALECO Co., Ltd. Japan |
| Pachinko | Monakist Model FD | 2004 | Okumura Japan |
| Slot Machine | Money Baked Ham | 2004 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | Money Belt | 2004 | WMS Gaming, Inc. Chicago, IL, USA |
| Slot Machine | Money Bug | 2004 | WMS Gaming, Inc. Chicago, IL, USA |
| Slot Machine | Money Hungry | 2004 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | Money in the Bank Number Power | 2004 | Konami Corp. Japan |
| Slot Machine | Money Laundry | 2004 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | Money Mint | 2004 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | Money on the Move | 2004 | WMS Gaming, Inc. Chicago, IL, USA |
| Slot Machine | Money Pocket | 2004 | Aruze Corp. Japan |
| Slot Machine | Money Shaker | 2004 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | Money Toad | 2004 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | Money! Money! | 2004 | Subsino Co., Ltd. |
| Slot Machine | Moneywell Manor | 2004 | IGT International Game Technologies Reno, NV, USA |
| Video Slot Machine | Monkey Land | 2004 | Astro Corp. Taipei, Taiwan |
| Pachislot | Monkey vs. Crab !!! | 2004 | Bellco Corp. Japan |
| Sony PlayStation 2 disc | Monochrome Model SLPM-65682 | 2004 | KID Kindle Imagine Develop |
| Slot Machine | Monopoly - 5X Railroad | 2004 | WMS Gaming, Inc. Chicago, IL, USA |
