| Slot Machine |  Rapid Play | 2004 | WMS Gaming, Inc. Chicago, IL, USA |
| Slot Machine | Rapid Play Keno | 2004 | WMS Gaming, Inc. Chicago, IL, USA |
| Slot Machine | Rapid Play Poker | 2004 | WMS Gaming, Inc. Chicago, IL, USA |
| Redemption game (mechanical) | Raptor Captor Jumbo | 2004 | 5 Star Redemption, Inc. Los Angeles, CA, USA |
| Redemption game (mechanical) | Raptor Captor Super Grand | 2004 | 5 Star Redemption, Inc. Los Angeles, CA, USA |
| Redemption game (mechanical) | Raptor Island | 2004 | 5 Star Redemption, Inc. Los Angeles, CA, USA |
| Sony PlayStation CD | Rascal Racers Model SLUS-01575 | 2004 | Mud Duck Productions |
| Slot Machine | Rawhide | 2004 | Konami Gaming, Inc. Las Vegas, NV, USA |
| Sony PlayStation CD |  Raycrisis | 2004 | Taito Corp. Japan |
| Nintendo GBA cart. | Razbitume Restez Branchés! | 2004 | T-HQ, Inc. Toy HeadQuarters |
| Arcade Video game | Re-Volt P | 2004 | Tsunami Visual Technologies |
| PC/MS-Windows CD | Realize Me | 2004 | Mink Japan |
| Slot Machine | Rebel 777 | 2004 | WMS Gaming, Inc. Chicago, IL, USA |
| Microsoft XBOX disc | Red Dead Revolver | 2004 | Unknown |
| Sony PlayStation 2 disc | Red Dead Revolver Model SLES-52478 | 2004 | Take-Two Interactive |
| Fruit Machine | Red Dragon Model PR2542 | 2004 | QPS Interactive Novomatic Group |
| Slot Machine | Red Hot 7's Respin | 2004 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | Red Hot Chilli | 2004 | Universal Co., Ltd Tokyo, Japan |
| Slot Machine | Red Hot Streak | 2004 | Stargames, Ltd. Australia |
| Slot Machine | Red Hot Winner | 2004 | Stargames, Ltd. Australia |
| Slot Machine | Red Hottie | 2004 | Barcrest USA IGT Group USA |
| Pachislot | Red Seven | 2004 | Luster Co., Ltd. Japan |
| Slot Machine | Red White & Blue - Super Stars | 2004 | IGT International Game Technologies Reno, NV, USA |
| Redemption game (mechanical) | Red Zone | 2004 | Bay Tek, Inc. Pulaski, WI, USA |
| Slot Machine | Reel Charms | 2004 | IGT International Game Technologies Reno, NV, USA |
| Fruit Machine | Reel Good Time | 2004 | Global Games |
| Slot Machine | Reel Heroes | 2004 | WMS Gaming, Inc. Chicago, IL, USA |
| Slot Machine | Reel Legends | 2004 | WMS Gaming, Inc. Chicago, IL, USA |
| Slot Machine | Relic Hunter | 2004 | Konami Gaming, Inc. Las Vegas, NV, USA |
| PC/MS-Windows CD | Replay 4 | 2004 | Open Mind World Korea |
| Nokia N-Gage card | Requiem of Hell | 2004 | Nokia |
| Pachinko | Rerere ni Omakase | 2004 | Daiichi Denshi |
| Video Slot Machine | Resident | 2004 | Igrosoft |
| PC/MS-Windows CD | Return to Mysterious Island | 2004 | DreamCatcher Interactive |
| GCE Vectrex | Revector Hb | 2004 | Packrat Video Games, LLC |
| Colecovision cart. | Reversi & Diamond Dash Hb | 2004 | Amy Marie Bienvenu |
| Slot Machine | Rex | 2004 | Bally Wulff |
| Slot Machine | Rex Go 3 | 2004 | Bumwoo Co. Korea |
| Sony PlayStation CD | Rhythm Beat Model SLES-04146 | 2004 | Phoenix Games |
| Nintendo GameCube disc | Ribbit King Model DOL-GKRE-USA | 2004 | Bandai America, Inc. 45557 |
