| 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 |
| Sega Saturn CD | Kidou Senkan Nadesico - The Blank of 3 Years | 1998 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Saturn CD | Kidou Senshi Gundam - Gihren no Yabou - Kouryaku Shireisho Model T-13333G | 1998 | Bandai Co., Ltd. Japan |
| Sega Saturn CD | Kidou Senshi Gundam - Gihren no Yabou Model T-13327G | 1998 | Bandai Co., Ltd. Japan |
| Sega Saturn CD | Kidou Senshi Gundam - Gihren no Yabou Model T-13330G | 1998 | Bandai Co., Ltd. Japan |
| Sony PlayStation CD | Kimagure My Baby - Musume no Sugoroku Seichouki Model SLPS-01177 | 1998 | ASK Kodansha Co., Ltd. Japan |
| Sega Saturn CD | Kindaichi Shounen no Jikenbo - Hoshimitou Kanashimi no Fukushuuki | 1998 | Hudson Soft. Hudson Group Japan |
| Sony PlayStation CD | Kindaichi Shounen no Jikenbo - Jigoku Yuuen Satsujin Jiken Model SLPS-01340~1 | 1998 | Kodansha Japan |
| Pachislot | King Bary | 1998 | Pioneer Co., Ltd. Japan |
| Nintendo 64 cart. | King Hill 64 - Extreme Snowboarding Model NUS-NSBJ | 1998 | Kemco, Ltd. |
| Slot Machine | King Lotus - 7's Wild Plus | 1998 | Universal Co., Ltd Tokyo, Japan |
| Sony PlayStation CD | King of Bowling 2 - Professional-Hen Model SLPS-01541 | 1998 | Coconuts Japan |
| SNK Neo-Geo Pocket cart. | King of Fighters R-1 Pocket Kakutou Series Model NEOP00010 | 1998 | SNK Corp. Shin Nihon Kikaku Japan |
| Sony PlayStation CD | King of Parlor 2 Model SLPS-01423 | 1998 | TEN Institute |
| PC/MS-Windows CD |  King's Quest - La Maschera dell'Eternità | 1998 | Sierra Ent., Inc. USA |
| PC/MS-Windows CD | KippenSchieten | 1998 | Ravensburger Interactive |
| Nintendo 64 cart. | Kiratto Kaiketsu! 64 Tanteidan Model NUS-N64J | 1998 | Imagineer Co., Ltd. Japan |
| Nintendo Super Famicom cart. | Kirby no Kirakira Kids Model SHVC-BKKJ-JPN | 1998 | Nintendo Co., Ltd. Japan |
| 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 |
| PC/MS-Windows CD | KKnD2 - Krossfire | 1998 | Melbourne House UK 015901 |
| 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 |
| PC/MS-Windows CD | Klingon Honor Guard | 1998 | MicroProse, Ltd. Bristol, UK 015352 |
| Slot Machine | Klondike 5 Line | 1998 | Cadillac Jack Duluth, GA, USA |
| 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 |
| Nintendo 64 cart. | Knife Edge - Nose Gunner | 1998 | Kemco, Ltd. |
| Nintendo 64 cart. | Knife Edge - Nose Gunner Model NUS-NKEJ | 1998 | Kemco, Ltd. |
| Sony PlayStation CD | Knight & Baby Model SLPS-01531 | 1998 | Tamsoft |
| PC/MS-Windows CD | Knights and Merchants | 1998 | TopWare Interactive AG |
| PC/MS-Windows CD | Knockout Kings | 1998 | Electronic Arts CA, USA 14633 |
