| 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 |
| Slot Machine | Monopoly - Fiery Sevens | 2004 | WMS Gaming, Inc. Chicago, IL, USA |
| Slot Machine | Monopoly - Reel Riches | 2004 | WMS Gaming, Inc. Chicago, IL, USA |
| Slot Machine | Monopoly - Shake Rattle and Roll | 2004 | WMS Gaming, Inc. Chicago, IL, USA |
| Slot Machine | Monopoly - Wild Dice | 2004 | WMS Gaming, Inc. Chicago, IL, USA |
| Nintendo GBA cart. | Monopoly Model AGB-BUME-USA | 2004 | DSI Games |
| Nintendo GBA cart. | Monopoly Model AGB-BUMP | 2004 | Zoo Digital Publishing |
| Medal video game | Monster Gate Online | 2004 | Konami Corp. Japan |
| Slot Machine | Monster Millions | 2004 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | Monster Party | 2004 | Subsino Co., Ltd. |
| Nintendo GBA cart. | Monster Summoner Model AGB-A3NJ-JPN | 2004 | Ertain |
| Nintendo GBA cart. | Monster Trucks Model AGB-BMCE-USA | 2004 | Majesco Sales, Inc. |
| Nintendo GBA cart. | Monster Trucks Model AGB-BMCP-EUR | 2004 | Majesco Sales, Inc. |
| Nintendo GBA cart. | Monster! Bass Fishing Model AGB-A4BE-USA | 2004 | AIA |
| Slot Machine | Monty Python and the Holy Grail | 2004 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | Moola Mother Lode | 2004 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | Moolah Rouge | 2004 | WMS Gaming, Inc. Chicago, IL, USA |
| Video Slot Machine | Moon Fire Jackpot Carnival | 2004 | Aristocrat Leisure Industries Pty, Ltd. |
| Slot Machine | Moonshine | 2004 | IGT International Game Technologies Reno, NV, USA |
| PC/MS-Windows CD | Moorhuhn Kart 2 | 2004 | Ak Tronic Soft. & Services GmbH |
| PC/MS-Windows CD | Moorhuhn Pinball | 2004 | Ak Tronic Soft. & Services GmbH |
| PC/MS-Windows CD | Moorhuhn Wanted | 2004 | Ak Tronic Soft. & Services GmbH |
| Pachislot | Morino Icchan | 2004 | Union Machinery |
| Dedicated Console | Mortal Kombat | 2004 | Jakks Pacific, Inc. |
| Sony PlayStation 2 disc | Mortal Kombat - Deception Model SLES-52705 | 2004 | Midway Home Ent. |
| Slot Machine | Mother Lode | 2004 | IGT International Game Technologies Reno, NV, USA |
| Redemption mechanical game | Movie Stop | 2004 | Bay Tek, Inc. Pulaski, WI, USA |
| MSX 2 disk | Mr Hawaii | 2004 | Unknown Japan |
