| Nintendo GameCube disc |  Ribbit King Model DOL-GKRP-EUR | 2004 | Bandai Co., Ltd. Japan |
| Microsoft XBOX disc |  Richard Burns Rally | 2004 | Unknown |
| Slot Machine | Riches of India | 2004 | AGI Austrian Gaming Industries Novomatic Group |
| Slot Machine | Riches of the Amazon | 2004 | WMS Gaming, Inc. Chicago, IL, USA |
| Microsoft XBOX disc | Ricochet - Lost Worlds | 2004 | Unknown |
| Nintendo DS cart. | Ridge Racer DS Model NTR-ARRE-USA | 2004 | NAMCO Hometek, Ltd. USA |
| Sony PSP UMD | Ridge Racers Model UCAS-40015 | 2004 | NAMCO, Ltd. Japan |
| Pinball | Ripley's Believe it or Not! | 2004 | Stern Pinball, Inc. Melrose Park, IL, USA |
| Medal game (video) | Rising Sun 2 | 2004 | Unknown Korea |
| Medal game (video) | Rising Sun 3 | 2004 | Unknown Korea |
| Slot Machine | Risk & Reward | 2004 | WMS Gaming, Inc. Chicago, IL, USA |
| Nintendo GBA cart. | River City Ransom EX Model AGB-BDTE-USA | 2004 | Atlus USA, Inc. CA, USA |
| Nintendo GBA cart. | Riviera - Yakusoku no Chi Riviera Model AGB-BREJ-JPN | 2004 | Sting Japan |
| Sony PlayStation 2 disc | Road Rage 3 Model SLES-51930 | 2004 | Phoenix Games |
| Slot Machine | Road to Riches | 2004 | WMS Gaming, Inc. Chicago, IL, USA |
| Nintendo GBA cart. | Road Trip - Shifting Gears Model AGB-A6RE-USA | 2004 | Conspiracy Ent. Corp. |
| Nintendo GameCube disc | Road Trip - The Arcade Edition Model DOL-GROE-USA | 2004 | Conspiracy Ent. Corp. |
| Sony PlayStation CD | Robin Hood - The Siege Model SLES-04110 | 2004 | Phoenix Games |
| Video Slot Machine | Robin's Adventure | 2004 | Amcoe, Inc. USA |
| Video Slot Machine | Robin's Adventure 2 | 2004 | Amcoe, Inc. USA |
| Sony PlayStation CD | Robocod - James Pond II Model SLES-04112 | 2004 | Play It |
| Pachinko | RoboCop Model J | 2004 | Okumura Japan |
| Commodore C64 disk | Robot 001 Hb | 2004 | Scserbin, Zoltan |
| Microsoft XBOX disc | Robotech - Invasion | 2004 | Unknown |
| Video Slot Machine | Rock Climber | 2004 | Igrosoft |
| Slot Machine | Rock On! | 2004 | GTech Corp. Providence, RI, USA |
| Slot Machine | Rock the Croc | 2004 | AGI Austrian Gaming Industries Novomatic Group |
| Slot Machine | Rocket Riches | 2004 | WMS Gaming, Inc. Chicago, IL, USA |
| Nintendo GBA cart. | Rockman EXE 4.5 - Real Operation Model AGB-BR4J-JPN | 2004 | Capcom Co., Ltd. Japan |
| Nintendo GBA cart. | Rockman EXE 5 - Team of Blues Model AGB-BRBJ-JPN | 2004 | Capcom Co., Ltd. Japan |
| Nintendo GBA cart. | Rockman EXE 5 - Team of Colonel Model AGB-BRKJ-JPN | 2004 | Capcom Co., Ltd. Japan |
| Nintendo GameCube disc | Rockman X - Command Mission | 2004 | Capcom Co., Ltd. Japan |
| Nintendo GBA cart. | Rockman Zero 3 Model AGB-BZ3J-JPN | 2004 | Capcom Co., Ltd. Japan |
| Slot Machine | Rocky | 2004 | AGMN Co., Ltd. Korea |
| Microsoft XBOX disc | Rocky - Legends | 2004 | Unknown |
| Sony PlayStation 2 disc | Rocky - Legends Model SLES-52761 | 2004 | Ubisoft Ent. Montreuil sous Bois, France |
| Slot Machine | Roll to Riches | 2004 | IGT International Game Technologies Reno, NV, USA |
| PC/MS-Windows CD | RollerCoaster Tycoon 3 | 2004 | Atari Interactive, Inc. |
| PC/MS-Windows CD | Rome - Total War | 2004 | Activision Publishing, Inc. Los Angeles, CA, USA 47875 |
| Slot Machine | Ron Popeil's But Wait! Win More! | 2004 | IGT International Game Technologies Reno, NV, USA |
