| MSX cart. |  Mr. Chef & the Sausages Hb | 2004 | Paxanga Soft |
| Nintendo DS cart. | Mr. Driller - Drill Spirits Model NTR-ADRE-USA | 2004 | NAMCO Hometek, Ltd. USA |
| Nintendo DS cart. | Mr. Driller - Drill Spirits Model NTR-ADRJ-JPN | 2004 | NAMCO, Ltd. Japan |
| Nintendo GBA cart. |  Mr. Driller 2 Model AGB-BR2P | 2004 | NAMCO, Ltd. Japan |
| Nintendo GBA cart. | Mr. Incredible Model AGB-BICJ-JPN | 2004 | D3 Publisher, Inc. |
| Nintendo GameCube disc | Mr. Incredibles | 2004 | D3 Publisher, Inc. |
| Slot Machine | Mr. Payback | 2004 | IGT International Game Technologies Reno, NV, USA |
| PC/MS-Windows CD | Mrs. Jiyanki | 2004 | Blue Gale |
| Slot Machine | Ms. Little Green Men Reel Touch | 2004 | IGT International Game Technologies Reno, NV, USA |
| Nintendo GBA cart. | Ms. Pac-Man - Maze Madness Model AGB-BPCE-USA | 2004 | NAMCO, Ltd. Japan |
| Nintendo GBA cart. | Ms. Pac-Man - Maze Madness Model AGB-BPCP-EUR | 2004 | Zoo Digital Publishing |
| Dedicated Console | Ms. Pac-Man 7-in-1 | 2004 | Jakks Pacific, Inc. |
| Medal video game | Mud Ae Po | 2004 | Unknown Korea |
| Slot Machine | Mula Hoop | 2004 | WMS Gaming, Inc. Chicago, IL, USA |
| Video Slot Machine |  Multi Fish | 2004 | Igrosoft |
| Video Slot Machine | Multi Gaminator I | 2004 | AGI Austrian Gaming Industries Novomatic Group |
| Video Slot Machine | Multi Gaminator IV | 2004 | AGI Austrian Gaming Industries Novomatic Group |
| Slot Machine | Multi-Pay Plus Poker | 2004 | WMS Gaming, Inc. Chicago, IL, USA |
| Sony PlayStation 2 disc | Muppets Party Cruise Model SLES-52230 | 2004 | TDK Mediactive, Inc. |
| Arcade Video game | Mushihime Sama | 2004 | Cave Co., Ltd. Japan |
| Nintendo GameCube disc | MVP Baseball 2004 Model DOL-GVPE-USA | 2004 | Electronic Arts CA, USA 14633 |
| Slot Machine | My My Maya | 2004 | Magic Dreams |
| PC/MS-Windows CD | Myst IV - Revelation | 2004 | Ubisoft Ent. Montreuil sous Bois, France |
| Pachinko | Naki no Ryu | 2004 | Sansei R&D Japan |
| Slot Machine | Name your Prize | 2004 | IGT International Game Technologies Reno, NV, USA |
| Pachislot | Nanadechu 7 | 2004 | Bellco Corp. Japan |
| PC/MS-Windows pack. | Nancy Drew - Curse of Blackmoor Manor Model 31830 | 2004 | Steam Valve Corp. |
| PC/MS-Windows CD | Nancy Drew 10 - The Secret of Shadow Ranch | 2004 | Her Interactive |
| PC/MS-Windows CD | Nancy Drew 11 - Curse of Blackmoor Manor | 2004 | Her Interactive |
| Pachislot | Nangoku Sodachi | 2004 | Olympia Co., Ltd. Japan |
| Pachislot | Nangoku Sodachi 30 Pai | 2004 | Olympia Co., Ltd. Japan |
| Pachislot | Nangoku Sodachi 30 Pai Alt. Art 2 | 2004 | Olympia Co., Ltd. Japan |
| Pachislot | Nangoku Sodachi 30 Pai Alt. Art 3 | 2004 | Olympia Co., Ltd. Japan |
| Pachislot | Nangoku Sodachi 30 Pai Alt. Art | 2004 | Olympia Co., Ltd. Japan |
| Pachislot | Nangoku Sodachi Alt. Art 2 | 2004 | Olympia Co., Ltd. Japan |
| Pachislot | Nangoku Sodachi Alt. Art 3 | 2004 | Olympia Co., Ltd. Japan |
| Pachislot | Nangoku Sodachi Alt. Art | 2004 | Olympia Co., Ltd. Japan |
| Medal video game | Nano Gambler | 2004 | Unknown Korea |
| Medal video game | Nanta | 2004 | Unknown Korea |
| Nintendo GameCube disc | Naruto Gekitou Ninja Taisen! 3 Model DOL-G3NJ-JPN | 2004 | Tomy |
