| Nintendo GBA cart. |  International Karate Plus Model AGB-A3KE-USA | 2003 | Ignition Ent., Ltd. |
| Nintendo GBA cart. | International Karate Plus Model AGB-A3KP-EUR | 2003 | Ignition Ent., Ltd. |
| Sony PlayStation 2 disc | International Pool Championship Model SLES-51629 | 2003 | Play It |
| Nintendo GBA cart. | International Superstar Soccer Advance Model AGB-AY2P-EUR | 2003 | Konami Corp. Japan |
| Sony PlayStation CD |  Inuyasha - A Feudal Fairy Tale Model SLUS-01534 | 2003 | Bandai America, Inc. 45557 |
| Nintendo GBA cart. | Inuyasha - Naraku no Wana! Mayoi no Mori no Shoutaijou Model AGB-AIYJ-JPN | 2003 | Takara Co., Ltd. Japan |
| Nintendo GBA cart. | Iridion II Model AGB-AI2E-USA | 2003 | Majesco Sales, Inc. |
| Nintendo GBA cart. | Iridion II Model AGB-AI2P | 2003 | Vivendi Universal Games, Inc. |
| Sega Dreamcast GD | Iris Model T-19721M | 2003 | KID Kindle Imagine Develop |
| Pachinko | Iruna Bomber | 2003 | Sansei R&D Japan |
| Slot Machine | It's All Greek to Me | 2003 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | It's My Party! | 2003 | IGT International Game Technologies Reno, NV, USA |
| Takara e-Kara cart. | J-Pop Mix Mini Vol. 1 Model MC0009-JPM | 2003 | Takara Co., Ltd. Japan |
| Takara e-Kara cart. | J-Pop Mix Vol. 43 Model EC0083-JPM | 2003 | Takara Co., Ltd. Japan |
| Medal video game | Jackpot Jabara | 2003 | Unknown Korea |
| Slot Machine | Jackpot Safari | 2003 | Konami Gaming, Inc. Las Vegas, NV, USA |
| Slot Machine | Jackpot Smile | 2003 | Universal Co., Ltd Tokyo, Japan |
| Slot Machine | Jackpot Station | 2003 | WMS Gaming, Inc. Chicago, IL, USA |
| Sony PlayStation CD | Jaleco Collection Vol. 1 Model SLPS-03562 | 2003 | PCCW Japan Pacific Century Cyber Work |
| Sony PlayStation 2 disc |  Jampack - Summer 2003 Model SCUS-97280 | 2003 | Sony Computer Ent. America SCEA CA, USA |
| Sony PlayStation 2 disc | Jampack - Summer 2003 Model SCUS-97281 | 2003 | Sony Computer Ent. America SCEA CA, USA |
| Sony PlayStation 2 disc | Jampack - Winter 2003 Model SCUS-97312 | 2003 | Sony Computer Ent. America SCEA CA, USA |
| Sony PlayStation 2 disc | Jampack - Winter 2003 Model SCUS-97313 | 2003 | Sony Computer Ent. America SCEA CA, USA |
| Dedicated Console | Jara-Ja Land | 2003 | Takara Co., Ltd. Japan |
| Pachislot | Jazz Seven | 2003 | Rick |
| Slot Machine | Jazzy 7 | 2003 | Universal Co., Ltd Tokyo, Japan |
| Slot Machine | Jeff Foxworthy - You Might Be a Redneck If | 2003 | Aristocrat Leisure Industries Pty, Ltd. |
| Video Slot Machine | Jester Magic | 2003 | Konami Gaming, Inc. Las Vegas, NV, USA |
| Nintendo GBA cart. | Jet Grind Radio Model AGB-AJRE-USA | 2003 | T-HQ, Inc. Toy HeadQuarters |
| Pachislot | Jet Set Radio | 2003 | Rodeo Corp. Japan |
| Sega Dreamcast GD |  Jet Set Radio Model HDR-0212 | 2003 | SEGA Corp. |
| Sinclair ZX Spectrum cass. | Jet Set Willy Construction Kit Hb | 2003 | Broadsoft |
| Sinclair ZX Spectrum cass. | Jet Set Willy: FTB Hb | 2003 | Martland, Edward |
| Sinclair ZX Spectrum cass. | Jet Set Willy: Mr Top Hat Hb | 2003 | Aldridge, Nick |
| Sony PlayStation CD | Jikkyou Powerful Pro Yakyuu - Premium-Ban Model SLPM-87216 | 2003 | Konami Corp. Japan |
| Sony PlayStation 2 disc | Jikkyou Powerful Pro Yakyuu 10 - Chou Ketteiban - 2003 Memorial Model SLPM-65445 | 2003 | Konami Corp. Japan |
| Sony PlayStation 2 disc | Jikkyou Powerful Pro Yakyuu 10 taikenban Model SLPM-61053 | 2003 | Konami Corp. Japan |
| Sony PlayStation 2 disc | Jikkyou Powerful Pro Yakyuu 10 Model SLPM-65317 | 2003 | Konami Corp. Japan |
| Nintendo GBA cart. | Jim Henson's Muppets - On with the Show! Model AGB-AZME-USA | 2003 | TDK Mediactive, Inc. |
| Nintendo GBA cart. | Jim Henson's Muppets - On with the Show! Model AGB-AZMP | 2003 | TDK Mediactive, Inc. |
