| 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. |
| 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 |
| Nintendo GBA cart. | Konchuu Monster Battle Master Model AGB-BQBJ-JPN | 2005 | Culture Brain |
| Nintendo GBA cart. | Konchuu Monster Battle Stadium Model AGB-BQSJ-JPN | 2005 | Culture Brain |
| Nintendo GBA cart. | Konchuu no Mori no Daibouken - Fushigi na Sekai no Juunin-tachi Model AGB-BQKJ-JPN | 2005 | Culture Brain |
| Nintendo GBA cart. | Kong - King of Atlantis Model AGB-BK7E-USA | 2005 | Majesco Ent. Co. |
| Nintendo GBA cart. | Kong - King of Atlantis Model AGB-BK7P | 2005 | Majesco Ent. Co. |
| Nintendo GBA cart. | Kong - The 8th Wonder of the World Model AGB-BKQE-USA | 2005 | Ubisoft Ent. Montreuil sous Bois, France |
| Nintendo GBA cart. | Konjiki no Gashbell!! The Card Battle for GBA Model AGB-BKEJ-JPN | 2005 | Banpresto Japan |
| Nintendo GBA cart. | Konjiki no Gashbell!! Yuujou no Zakeru - Dream Tag Tournament Model AGB-BUDJ-JPN | 2005 | Banpresto Japan |
| Nintendo Game Boy Color cart. | Kou Dai Yao Guai - Bai Jin Ban | 2005 | Sintax China |
| Nintendo GBA cart. | Kouchu Ouja Mushiking - Greatest Champion e no Michi Model AGB-BK6J-JPN | 2005 | SEGA Corp. |
| Sega Beena cart. | Kouchuu Ouja Mushiking - Mori no Tami no Densetsu: Minna de Tanken! Kouchuu no Mori | 2005 | SEGA Toys |
| Slot Machine | Krak'n Keno | 2005 | IGT International Game Technologies Reno, NV, USA |
| MSX cart. | Kralizec Tetris Hb | 2005 | Kralizec |
| Slot Machine | Kron Prinz | 2005 | Bally Wulff |
| Nintendo GBA cart. | Kunio Kun Nekketsu Collection 1 Model AGB-B9AJ-JPN | 2005 | Atlus Co., Ltd. Japan |
| Nintendo GBA cart. | Kunio Kun Nekketsu Collection 2 Model AGB-B9BJ-JPN | 2005 | Atlus Co., Ltd. Japan |
| Redemption mechanical game | Kuru.Kuru-Count! | 2005 | Komaya Co., Ltd. Japan |
| Pachinko | Kyojin no Hoshi 2 | 2005 | Takao Co., Ltd. Japan |
| Pachislot | Kyojin no Hoshi III Art. 1 | 2005 | Aristocrat Technologies Co., Ltd. Tokyo, Japan |
| Pachislot | Kyojin no Hoshi III Art. 2 | 2005 | Aristocrat Technologies Co., Ltd. Tokyo, Japan |
| Slot Machine | L.A. Gator | 2005 | Aristocrat Leisure Industries Pty, Ltd. |
| Amstrad CPC 464 disk | La Planete Mysterieuse Hb | 2005 | Demoniak |
