| K.O. - The Pro Boxing (Japan) | |
| Kaept'n Blaubaer - Die verrueckte Schatzsuche (Germany) | |
| Kaitei Densetsu!! Treasure World (Japan) | |
| Kakurenbo Battle Monster Tactics (Japan) | |
| Kakutou Ryouri Densetsu Bistro Recipe - Gekitou Foodon Battle Hen (Japan) | |
| Kakutou Ryouri Densetsu Bistro Recipe - Kettou Bistgarm Hen (Japan) | |
| Kanji Boy (Japan) | |
| Kanji Boy 2 (Japan) | |
| Kanji Boy 3 (Japan) | |
| Kanji de Puzzle (Japan) | |
| Kanzume Monsters Parfait (Japan) | |
| Karamuchou wa Oosawagi! - Okawari! (Japan) (NP) | |
| Karamuchou wa Oosawagi! - Polinkies to Okashina Nakama-tachi (Japan) | |
| Karan Koron Gakuen - Hanafuda Mahjong (Japan) | |
| Karate Joe (Europe) (Unl) | |
| Kaseki Sousei Reborn II - Monster Digger (Japan) | |
| Katou Hifumi Kudan - Shougi Kyoushitsu (Japan) | |
| Kawa no Nushi Tsuri 4 (Japan) | |
| Kawaii Pet Shop Monogatari (Japan) | |
| Kawaii Pet Shop Monogatari 2 (Japan) | |
| Keep the Balance (Europe) (En,Fr,De,Es,It) | |
| Keibajou e Ikou! Wide (Japan) | |
| Keitai Denjuu Telefang - Power Version (Japan) | |
| Keitai Denjuu Telefang - Speed Version (Japan) | |
| Kelly Club - Clubhouse Fun (USA) | |
| Ken Griffey Jr.'s Slugfest (USA) | |
| Kettou Beast Wars - Beast Senshi Saikyou Ketteisen (Japan) | |
| Kidou Senkan Nadesico - Ruri Ruri Mahjong (Japan) | |
| Kikansha Thomas - Sodor-tou no Nakama-tachi (Japan) | |
| Kindaichi Shounen no Jikenbo - 10nenme no Shoutaijou (Japan) | |
| Kinniku Banzuke GB - Chousensha wa Kimida! (Japan) | |
| Kinniku Banzuke GB2 - Mezase! Muscle Champion (Japan) | |
| Kinniku Banzuke GB3 - Shinseiki Survival Retsuden! (Japan) | |
| Kirby Tilt 'n' Tumble (USA) | |
| Kirikou (Europe) (En,Fr,De,Es,It,Pt) | |
| Kisekae Series 2 - Oshare Nikki (Japan) | |
| Kisekae Series 3 - Kisekae Hamster (Japan) | |
| Klax (USA) | |
| Klustar (Europe) (En,Fr,De,Es,It) | |
| Klustar (USA) | |
| Knockout Kings (USA, Europe) | |
| Koenig der Loewen, Der - Simbas grosses Abenteuer (Germany) | |
| Koguru Guruguru - Guruguru to Nakayoshi (Japan) (NP) | |
| Konami GB Collection Vol.1 (Europe) | |
| Konami GB Collection Vol.2 (Europe) | |
| Konami GB Collection Vol.3 (Europe) | |
| Konami GB Collection Vol.4 (Europe) | |
| Konami Winter Games (Europe) | |
| Konchuu Fighters (Japan) | |
| Konchuu Hakase 2 (Japan) | |