| Sony PlayStation CD |  Kazmania 2 - Chaos in Kazmania Model LSP-????? | 1998 | Lightspan Partnership, The |
| Sony PlayStation CD | Keiba Eight '98 Akifuyu Model SLPS-01640 | 1998 | Shangri-La |
| Sony PlayStation CD | Keiba Eight '98 Haru Natsu Model SLPS-01372 | 1998 | Shangri-La |
| Sony PlayStation CD |  Kensei - Sacred Fist Model SLES-01081 | 1998 | Konami Co., Ltd. Japan |
| Sony PlayStation CD | Kensei - Sacred Fist Model SLUS-00600 | 1998 | Konami of America CA, USA |
| Sony PlayStation CD | Kenshou Akou Jiken - Chuushingura - Rekishi Adventure Model SLPS-01186 | 1998 | Toei Animation Co., Ltd. Japan |
| Sony PlayStation CD | Kick Off World Manager Model SLES-01063 | 1998 | Funsoft |
| Sony PlayStation CD | Kick Off World Model SLES-01061 | 1998 | Funsoft |
| Sony PlayStation CD | Kick Off World Model SLES-01062 | 1998 | Funsoft |
| Sony PlayStation CD | Kick Off World Model SLES-01327 | 1998 | Funsoft |
| Sony PlayStation CD | Kick Off World Model SLES-01328 | 1998 | Funsoft |
| Sony PlayStation CD | Kimagure My Baby - Musume no Sugoroku Seichouki Model SLPS-01177 | 1998 | ASK Kodansha Co., Ltd. Japan |
| Sony PlayStation CD | Kindaichi Shounen no Jikenbo - Jigoku Yuuen Satsujin Jiken Model SLPS-01340~1 | 1998 | Kodansha Japan |
| Sony PlayStation CD | King of Bowling 2 - Professional-Hen Model SLPS-01541 | 1998 | Coconuts Japan |
| Sony PlayStation CD | King of Parlor 2 Model SLPS-01423 | 1998 | TEN Institute |
| Sony PlayStation CD | Kitchen Panic Model SLPS-01395 | 1998 | Panther Soft. Japan |
| Sony PlayStation CD | Kitty the Kool! Kabuki de Tanoshiku Odotte Ne!! Model SLPS-01566 | 1998 | Imagineer Co., Ltd. Japan |
| Sony PlayStation CD | Klaymen Klaymen - Neverhood no Nazo Model SLPS-01365 | 1998 | Riverhill Soft. Japan |
| Sony PlayStation CD | Klaymen Klaymen 2 - Skullmonkey no Gyakushuu Model SLPS-01501 | 1998 | Riverhill Soft. Japan |
| Sony PlayStation CD |  Klaymen Series Taikenban Model PAPX-90053 | 1998 | Riverhill Soft. Japan |
| Sony PlayStation CD | Klonoa - Door to Phantomile Model SCES-00942 | 1998 | Sony Computer Ent. Europe SCEE |
| Sony PlayStation CD | Klonoa - Door to Phantomile Model SCES-01185 | 1998 | Sony Computer Ent. Europe SCEE |
| Sony PlayStation CD | Klonoa - Door to Phantomile Model SCES-01186 | 1998 | Sony Computer Ent. Europe SCEE |
| Sony PlayStation CD | Klonoa - Door to Phantomile Model SCES-01187 | 1998 | Sony Computer Ent. Europe SCEE |
| Sony PlayStation CD | Klonoa - Door to Phantomile Model SCES-01188 | 1998 | Sony Computer Ent. Europe SCEE |
| Sony PlayStation CD | Klonoa - Door to Phantomile Model SLUS-00585 | 1998 | NAMCO Hometek, Ltd. USA |
| Sony PlayStation CD | Knight & Baby Model SLPS-01531 | 1998 | Tamsoft |
| Sony PlayStation CD | Knockout Kings 99 Model SLES-01448 | 1998 | EA Sports |
| Sony PlayStation CD | Knockout Kings 99 Model SLES-01450 | 1998 | EA Sports |
| Sony PlayStation CD | Knockout Kings Model SLUS-00737 | 1998 | EA Sports |
| Sony PlayStation CD |  Koei Teiban: Nobunaga no Yabou - Returns Model SLPM-86169 | 1998 | KOEI Co., Ltd. Japan |
| Sony PlayStation CD | Koei the Best: Nanatsu no Hikan Model SLPM-86179~81 | 1998 | KOEI Co., Ltd. Japan |
| Sony PlayStation CD | Koguma-chan no Daibouken Model SLPM-80195 | 1998 | Sunmark Japan |
| Sony PlayStation CD | Kojin Kyouju - La Lecon Particuliere Model SLPS-01354 | 1998 | MYCOM Japan |
| Sony PlayStation CD | Konami Antiques MSX Collection Vol.2 Model SLPM-86062 | 1998 | Konami Co., Ltd. Japan |
| Sony PlayStation CD | Konami Antiques MSX Collection Vol.3 Model SLPM-86072 | 1998 | Konami Co., Ltd. Japan |
| Sony PlayStation CD | Kouryuuki Model SLPS-01338 | 1998 | KOEI Co., Ltd. Japan |
| Sony PlayStation CD | Kula World Model SCES-01000 | 1998 | Sony Computer Ent. Europe SCEE |
| Sony PlayStation CD | KulaQuest Taikenban Model PCPX-96121 | 1998 | Sony Computer Ent., Inc. SCEI Japan |
| Sony PlayStation CD | Kumitate Battle - Kuttu Ketto Model SLPS-01208 | 1998 | Tecno Soft. TechnoSoft Japan |
