| Karate Champ (US VS version, set 2) | |
| Karate Champ (US) | |
| Karate Dou (Japan) | |
| Karian Cross (Rev. 1.0) | |
| Karnov (Japan) | |
| Karnov (US, rev 5) | |
| Karnov (US, rev 6) | |
| Karnov's Revenge / Fighter's History Dynamite | |
| Ken-Go (set 1) | |
| Ken-Go (set 2) | |
| Kero Kero Keroppi no Issyoni Asobou (Japan) | |
| Kero Kero Keroppi's Let's Play Together (USA, Version 2.0) | |
| Ketsui Kizuna Jigoku Tachi (2003/01/01. Master Ver., bootleg cartridge conversion) [Bootleg] | |
| Ketsui Kizuna Jigoku Tachi (Arrange Mode version 1.0, hack by Trap15) [Hack] | |
| Ketsui Kizuna Jigoku Tachi (Arrange Mode version 1.0, hack by Trap15) [Hack] | |
| Ketsui Kizuna Jigoku Tachi (Arrange Mode version 1.5, hack by Trap15) [Hack] | |
| Ketsui Kizuna Jigoku Tachi (Arrange Mode version 1.51, hack by Trap15) [Hack] | |
| Ketsui Kizuna Jigoku Tachi (Fast version, hack by Trap15) [Hack] | |
| Ketsui Kizuna Jigoku Tachi (MR. Stoic version 1.5, hack by Trap15) [Hack] | |
| Ketsui Kizuna Jigoku Tachi (MR. Stoic version 1.51, hack by Trap15) [Hack] | |
| Ketsui Kizuna Jigoku Tachi (MR. Stoic version, hack by Trap15) [Hack] | |
| Ketsui Kizuna Jigoku Tachi (Original?, Japan) | |
| Ketsui Kizuna Jigoku Tachi (Revision 1?, Japan) | |
| Ketsui Kizuna Jigoku Tachi (Revision 2? alt, Japan) | |
| Ketsui Kizuna Jigoku Tachi (Revision 2?, Japan) | |
| Kick (upright) | |
| Kick Boy | |
| Kick Off (Japan) | |
| Kick Rider | |
| Kicker | |
| Kickle Cubele [Bootleg] | |
| Kickman (upright) | |
| Kid Niki - Radical Ninja (US) | |
| Kid Niki - Radical Ninja (World) | |
| Kid no Hore Hore Daisakusen | |
| Kid no Hore Hore Daisakusen (bootleg) [Bootleg] | |
| KiKi KaiKai | |
| Killer Instinct | |
| Killer Instinct (SNES bootleg) | |
| Killer Instinct 2 | |
| King & Balloon (Japan) | |
| King & Balloon (US) | |
| King of Gladiator (The King of Fighters '97 bootleg) [Bootleg] | |
| King of Gladiator Plus (The King of Fighters '97 bootleg) [Bootleg] | |
| King of the Monsters (set 1) | |
| King of the Monsters (set 2) | |
| King of the Monsters 2 - The Next Thing (NGM-039)(NGH-039) | |
| K | |
| ing of the Monsters 2 - The Next Thing (older) | |
| King of the Monsters 2 - The Next Thing (prototype) [Prototype] | |
| Kingdom Grandprix (World) | |