| Nintendo Game Boy Color cart. |  Katou Hifumi Kudan - Shougi Kyoushitsu Model DMG-AKHJ-JPN | 1999 | Culture Brain |
| Nintendo Game Boy Color cart. | Kawa no Nushi Tsuri 4 Model DMG-VUTJ-JPN | 1999 | Victor Interactive Soft., Inc. |
| Nintendo Game Boy Color cart. | Kawaii Pet Shop Monogatari Model DMG-AEIJ-JPN | 1999 | Taito Corp. Japan |
| Bandai WonderSwan cart. | Kaze no Klonoa - Moonlight Museum Model SWJ-BAN008 | 1999 | Bandai Co., Ltd. Japan |
| Sony PlayStation CD | Keiba Eight '99 Haru Natsu Model SLPS-01929 | 1999 | Shangri-La |
| Sony PlayStation CD | Keiba Saishou no Housoku '99 Aki Fuyu Model SLPS-02339 | 1999 | Shangri-La |
| Bandai WonderSwan cart. | Keiba Yosou Shien Soft - Yosou Shinkaron Model SWJ-MDE001 | 1999 | Media Ent. Japan |
| Bandai WonderSwan cart. | Keitai Gyogun Tanchiki - WonderSwan Handy Sonar Model SWJ-BAN00F | 1999 | Bandai Co., Ltd. Japan |
| Nintendo 64 cart. | Ken Griffey Jr.'s Slugfest | 1999 | Nintendo Co., Ltd. Japan |
| Nintendo Game Boy Color cart. | Ken Griffey Jr.'s Slugfest Model CGB-AYAE-USA | 1999 | Nintendo of America, Inc. USA 45496 |
| Sony PlayStation CD |  Kenkaku Ibunroku - Yomigaerishi Souku no Yaiba - Samurai Spirits Shinshou - Promotion-ban Model SLPM-80512 | 1999 | SNK Corp. Shin Nihon Kikaku Japan |
| Sony PlayStation CD | Kenkaku Ibunroku - Yomigaerishi Souku no Yaiba - Samurai Spirits Shinshou Model SLPM-86345 | 1999 | SNK Corp. Shin Nihon Kikaku Japan |
| Sony PlayStation CD | Kessen - Demo Video CD-ROM Model SLPM-86432 | 1999 | KOEI Co., Ltd. Japan |
| Nintendo Game Boy Color cart. | Kettou Beast Wars - Beast Senshi Saikyou Ketteisen Model DMG-AB7J-JPN | 1999 | Takara Co., Ltd. Japan |
| PC/MS-Windows CD | Khan - Baram-ui Sinhwa | 1999 | Samsung Korea |
| Sega Dreamcast GD | Kidou Senkan Nadesico - Nadesico the Mission Model T-27901M | 1999 | Kadokawa Shoten Japan |
| Nintendo Game Boy Color cart. | Kidou Senkan Nadesico - Ruri Ruri Mahjong Model CGB-AQNJ-JPN | 1999 | King Records Co., Ltd. Japan |
| Sega Dreamcast GD | Kidou Senshi Gundam Gaiden - Colony no Ochichitachi de... Model T-13302M | 1999 | Bandai Co., Ltd. Japan |
| Bandai WonderSwan cart. | Kidou Senshi Gundam MSVS Model SWJ-BAN015 | 1999 | Bandai Co., Ltd. Japan |
| Sony PlayStation CD | Kiganjo Model SLPS-02370 | 1999 | Kodansha Japan |
| PC/MS-Windows CD | Killer Loop | 1999 | Crave Ent., Inc. |
| Sony PlayStation CD | Killer Loop Model SLES-01878 | 1999 | Crave Ent., Inc. |
| Sony PlayStation CD | Killer Loop Model SLUS-00938 | 1999 | Crave Ent., Inc. |
| Sony PlayStation CD | Kimi no Kimochi, Boku no Kokoro - I've Posessed Your Body! Model SLPS-02271 | 1999 | Takara Co., Ltd. Japan |
| Sony PlayStation CD | Kindaichi Shounen no Jikenbo 3 - Seiryuu Densetsu Satsujin Jiken Model SLPS-02223~4 | 1999 | Kodansha Japan |
| Pachislot | King Jack | 1999 | Okazaki Sangyo Co., Ltd. Japan |
| Arcade Video game | King of Dynast Gear | 1999 | EZ Graphics |
| SNK Neo-Geo Pocket Color cart. | King of Fighters R-2 Pocket Kakutou Series Model NEOP00230 | 1999 | SNK Corp. Shin Nihon Kikaku Japan |
| Pachislot | King of the Tiger | 1999 | Kitac Kita Denshi Corp. Japan |
| Slot Machine | King Putt | 1999 | Silicon Gaming, Inc. SGI |
| Pachislot | Kingbaby | 1999 | Pioneer Co., Ltd. Japan |
| DVD Player game | Kingdom II - Shadoan | 1999 | DVD, Ltd. |
| PC/MS-Windows CD | Kingpin - Life of Crime | 1999 | Interplay |
| Sony PlayStation CD | Kingsley's Adventure Model SCES-01659 | 1999 | Psygnosis, Ltd. |
| Sony PlayStation CD | Kingsley's Adventure Model SLUS-00801 | 1999 | Psygnosis, Ltd. |
| Nintendo Game Boy Color cart. | Kinniku Banzuke GB - Chousensha wa Kimida! Model DMG-A5KJ-JPN | 1999 | Konami Co., Ltd. Japan |
| Sony PlayStation CD | Kinniku Banzuke Vol. 1 - Ore ga Saikyou no Otoko da! Model SLPM-86381 | 1999 | Konami Co., Ltd. Japan |
| Bandai WonderSwan cart. | Kiss Yori... - Seaside Serenade Model SWJ-KDX001 | 1999 | KID Kindle Imagine Develop |
| Sega Saturn CD | Kiss Yori... Shokai Genteiban | 1999 | KID Kindle Imagine Develop |
| Sony PlayStation CD | Kita Denshi - Virtua Pachi-Slot Model SLPS-01821 | 1999 | Map Japan |
