| PC/MS-Windows CD |  Joint Operations - Escalation | 2004 | NovaLogic |
| PC/MS-Windows CD | Joint Operations - Typhoon Rising | 2004 | NovaLogic |
| Medal video game | Joker Bar | 2004 | Unknown Korea |
| Slot Machine | Joker Mania | 2004 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | Joker Shot | 2004 | Dragon Co., Ltd. |
| Medal video game | Joyco | 2004 | BGG Professional Korea |
| Medal video game | Joyco DX | 2004 | BGG Professional Korea |
| Medal video game | Joyco FX | 2004 | BGG Professional Korea |
| Takara Jumping Popira cart. | JP-01 | 2004 | Takara Co., Ltd. Japan |
| Takara Jumping Popira cart. | JP-02 | 2004 | Takara Co., Ltd. Japan |
| PC/MS-Windows pack. | Jpoker | 2004 | Masula, Jace |
| Bandai WonderSwan Color cart. | Judgement Silversword - Rebirth Edition | 2004 | Qute Corp. Japan |
| Medal video game | Julia | 2004 | Unknown Korea |
| Medal video game | Julia 2 | 2004 | Unknown Korea |
| Redemption mechanical game | Jumbo Cyclone | 2004 | Yuvo |
| Slot Machine | Jump Jive and Win | 2004 | WMS Gaming, Inc. Chicago, IL, USA |
| Slot Machine | Jumpin' Miracle Model WMH-208JM | 2004 | Paokai Electronic Enterprise Co., Ltd. Taiwan |
| Slot Machine | Jumping Fruits | 2004 | Extreme Games, S.L. Spain |
| Dedicated Console | Jumping Popira | 2004 | Takara Co., Ltd. Japan |
| Medal video game | Jungle Book Alpha | 2004 | ITec Korea |
| Medal video game | Jungle Book Beta | 2004 | ITec Korea |
| Pachinko | Jungle Fish Model FJ | 2004 | Maruhon Japan |
| Pachinko | Jungle Fish Model FX | 2004 | Maruhon Japan |
| Pachinko | Jungle Fish Model G | 2004 | Maruhon Japan |
| Pachinko | Jungle Fish Model MX | 2004 | Maruhon Japan |
| Slot Machine | Jungle Monkey | 2004 | Videobet Estonia |
| Slot Machine | Just Say Win | 2004 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | K-9 Rewards | 2004 | IGT International Game Technologies Reno, NV, USA |
| Pachislot | Kaiji | 2004 | Rodeo Corp. Japan |
| Nintendo GameCube disc | Kaijuu no Shima - Amazing Island Model DOL-GKAJ-JPN | 2004 | SEGA Corp. |
| Nintendo GBA cart. | Kaiketsu Zorori to Mahou no Yuuenchi - Ohimesama o Sukue! Model AGB-BKOJ-JPN | 2004 | Bandai Co., Ltd. Japan |
| Pachislot | Kaizoku | 2004 | Daido |
| PC/MS-Windows CD | Kakyusei 2 | 2004 | Elf Japan |
| Slot Machine | Kalambur | 2004 | Kupidon |
| Nintendo GameCube disc |  Kao the Kangaroo Round 2 Model DOL-GKOP-NOE | 2004 | JoWooD Productions AG |
| IVL Easy Karaoke cart. | KaraokeMicro Star Cart. 3 | 2004 | IVL Technologies |
| Slot Machine | Kash King | 2004 | IGT International Game Technologies Reno, NV, USA |
| Pachinko | Kato-chan Kobucha Band World model | 2004 | Okumura Japan |
| Nintendo GBA cart. | Kawaii Koinu Wonderful Model AGB-B82J-JPN | 2004 | MTO, Inc. Japan |
| Nintendo GBA cart. | Kawaii Pet Game Gallery 2 Model AGB-BKPJ-JPN | 2004 | Culture Brain |
