| PC/MS-Windows CD |  Kazoku Keikaku Tsuioku | 2005 | DO Corp. Japan |
| Sega Beena cart. | Kazoku Minna no Nouryoku Trainer | 2005 | SEGA Toys |
| Pachinko | Keiji Mutoh Model FZ60 | 2005 | Maruhon Japan |
| Pachinko | Keiji Mutoh Model MT | 2005 | Maruhon Japan |
| Pachinko | Keiji Mutoh Model ST5 | 2005 | Maruhon Japan |
| Nintendo DS cart. | Kenshuui Tendou Dokuta 2 - Inochi no Tenbin | 2005 | Spike Japan |
| Redemption mechanical game | KeroKero Tenkini Na-Re | 2005 | FDEK Fuji Denshi Kogyo Co., Ltd Japan |
| Nintendo GBA cart. | Kessaku Sen Ganbare Goemon 1, 2 - Yuki Hime to Magginesu Model AGB-BG2J-JPN(RK370-J1) | 2005 | Konami Corp. Japan |
| Pachinko | Kick no Oni | 2005 | Takao Co., Ltd. Japan |
| Nintendo GBA cart. | Kid Paddle Model AGB-BYLP-EUR | 2005 | Atari Interactive, Inc. |
| Nintendo GBA cart. | Kid's Cards Model AGB-BCXE-USA | 2005 | Majesco Ent. Co. |
| Nintendo GBA cart. | Kidou Gekidan Harouza Haro Ichiza - Haro no Puyo Puyo Model AGB-BH6J-JPN | 2005 | Bandai Co., Ltd. Japan |
| Arcade Video game | Kidou Senshi Gundam 0079 - Card Builder | 2005 | NAMCO Bandai Games, Inc. Japan |
| Pachislot | Kids Gang | 2005 | Okazaki Sangyo Co., Ltd. Japan |
| Adobe Flash game | Kids' Choice Awards '05 Hangman | 2005 | Nickelodeon Viacom International, Inc. |
| Nintendo GBA cart. | Killer 3D Pool Model AGB-B3LE-USA | 2005 | DSI Games |
| Nintendo GBA cart. | Killer 3D Pool Model AGB-B3LP | 2005 | Zoo Digital Publishing |
| Nintendo GameCube disc | Killer7 | 2005 | Capcom Co., Ltd. Japan |
| Nintendo GameCube disc | Killer7 Model DOL-GK7E-USA | 2005 | Capcom Ent., Inc. USA 13388 |
| Nintendo GameCube disc |  Killer7 Model DOL-GK7P-EUR | 2005 | CE Europe, Ltd. Capcom Europe London, England 055060 |
| Nintendo DS cart. | Kim Possible - Kimmunicator Model NTR-AKPE-USA | 2005 | Buena Vista Games |
| Slot Machine | King Arthur | 2005 | Konami Gaming, Inc. Las Vegas, NV, USA |
| Slot Machine | King Cheetah | 2005 | IGT International Game Technologies Reno, NV, USA |
| Redemption mechanical game | King Crab | 2005 | Uniana Seoul, Koera |
| Slot Machine | King Fish | 2005 | Spectre Gaming, Inc. Plymouth, MN, USA |
| Fruit Machine | King Ker-Ching | 2005 | Maygay Machines, Ltd. |
| Nintendo GBA cart. | King Kong - The Official Game of the Movie Model AGB-BKQP-EUR | 2005 | Ubisoft Ent. Montreuil sous Bois, France |
| Arcade Video game | King of Jurassic | 2005 | Taito Corp. Japan |
| Slot Machine | King Tut's Fortune | 2005 | Spectre Gaming, Inc. Plymouth, MN, USA |
| Nintendo GBA cart. | Kingdom Hearts - Chain of Memories Model AGB-B8CP-EUR | 2005 | Square Enix Co., Ltd. Japan |
| Sony PSP UMD | Kingdom of Paradise | 2005 | Sony Computer Ent. America SCEA CA, USA |
| Microsoft XBOX disc | Kingdom Under Fire - Heroes | 2005 | Microsoft |
| Medal video game | KKA CH1 | 2005 | Royal Electronics Korea |
| Nintendo GBA cart. | Klonoa 2 - Dream Champ Tournament Model AGB-AN6E-USA | 2005 | NAMCO, Ltd. Japan |
| PC/MS-Windows CD | Knights of the Old Republic II - The Sith Lords | 2005 | LucasArts Ent. Co. |
| Microsoft XBOX disc | Knights of the Temple II | 2005 | Unknown |
| Arcade Video game | Kodai Oja Kyoryu King | 2005 | SEGA Corp. |
| Sony PlayStation 2 disc |  Koei Teiban Series: Shin Sangoku Musou 2 Model SLPM-66094 | 2005 | KOEI Co., Ltd. Japan |
| Sony PlayStation 2 disc | Koei the Best: Winning Post 6 Model SLPM-66173 | 2005 | KOEI Co., Ltd. Japan |
| Microsoft XBOX disc | KOF - Maximum Impact | 2005 | Unknown |
