| K.O. - The Pro Boxing |
| Kaept'n Blaubaer - Die verrueckte Schatzsuche |
| Kaijin Zona |
| Kaitei Densetsu!! Treasure World |
| Kakutou Ryouri Densetsu Bistro Recipe |
| Kakutou Ryouri Densetsu Bistro Recipe - Gekitou Foodon Battle Hen / Kettou Bistgarm Hen |
| Kandume Monsters Parfait |
| Kanji Boy |
| Kanji Boy 2 |
| Kanji Boy 3 |
| Kanji de Puzzle |
| Karamuchou wa Oosawagi! - Okawari! |
| Karamuchou wa Oosawagi! - Polinkies to Okashina Nakamatachi |
| Karamuchou wa Oosawagi! - Porinkiis to Okashina Nakamatachi |
| Karan Koron Gakuen - Hanafuda Mahjong |
| Karate Joe |
| Kaseki Sousei Reborn II - Monster Digger |
| Katou Hifumi Kudan no Shougi Kyoushitsu |
| Katou Ichi-Ni-San Kudan - Shougi Kyoushitsu |
| Kawa no Nushi Tsuri 3 |
| Kawa no Nushi Tsuri 4 |
| Kawaii Pet Shop Monogatari |
| Kawaii Pet Shop Monogatari 2 |
| Keep the Balance |
| Keibajou he Ikou! Wide |
| Keitai Denjuu Telefang |
| Keitai Denjuu Telefang - Speed Version / Power Version |
| Kelly Club - Clubhouse Fun |
| Ken Griffey Jr.'s Slugfest |
| Kettou Beast Wars - Beast Senshi Saikyou Ketteisen |
| Kidou Senkan Nadesiko - Ruri Ruri Mahjong |
| Kikansha Thomas - Sodor-tou no Nakamatachi |
| Kindaichi Shounen no Jikenbo - 10 Nenme no Shoutaijou |
| King of Fighters R-2 |
| Kinniku Banzuke GB - Chousensha wa Kimida! |
| Kinniku Banzuke GB2 - Mezase! Muscle Champion! |
| Kinniku Banzuke GB3 - Shin-Seiki Survival Retsuden! |
| Kirby's Tilt 'n' Tumble |
| Kirikou |
| Kisekae Hamster |
| Kisekae Series 2 - Oshare Nikki |
| Kisekae Series 3 - Kisekae Hamster |
| Klax |
| Klustar |
| Knockout Kings |
| Koenig der Loewen, Der - Simbas grosses Abenteuer |
| Koguru Guruguru - Guruguru to Nakayoshi |
| Konami GB Collection Vol.1 |
| Konami GB Collection Vol.2 |
| Konami GB Collection Vol.3 |
| Konami GB Collection Vol.4 |
| Konami Winter Games |
| Konchuu Fighters |
| Konchuu Hakase 2 |
| Konchuu Hakase 3 |
| Koro Koro Kirby |
| Koto Battle - Tengai no Moribito |
| Koushien Pocket |
| KRTL Jay und die Spielzeugdiebe |
