| | K.G. Bird (4VXFC5341, New Zealand, 87.98%) (sample of: 3bagflvt) | 1996 | Aristocrat | kgbird | | 0.00 |
| | K.G. Bird (4VXFC5341, New Zealand, 91.97%) (clone of: kgbird) (sample of: 3bagflvt) | 1996 | Aristocrat | kgbirda | | 0.00 |
| | Kabuki-Z (Japan) (clone of: kabukiz) | 1988 | Kaneko / Taito Corporation | kabukizj | Fighter / 2.5D | 0.00 |
| | Kabuki-Z (World) | 1988 | Kaneko / Taito Corporation Japan | kabukiz | Fighter / 2.5D | 6.94 |
 | Kageki (hack) (clone of: kageki) | 1992 | hack | kagekih | | 0.00 |
| Kageki (Japan) (clone of: kageki) | 1988 | Kaneko / Taito Corporation | kagekij | Fighter / Versus | 0.00 |
| Kageki (US) | 1988 | Kaneko / Taito America Corporation (Romstar license) | kageki | Fighter / Versus | 8.50 |
 | Kaiketsu Yanchamaru (Japan) (clone of: kidniki) | 1986 | Irem | yanchamr | Platform / Fighter Scrolling | 0.00 |
 | Kaiser Knuckle (Ver 2.1J 1994/07/29) (clone of: kaiserkn) | 1994 | Taito Corporation | kaiserknj | | 0.00 |
| Kaiser Knuckle (Ver 2.1O 1994/07/29) | 1994 | Taito Corporation Japan | kaiserkn | Fighter / Versus | 5.38 |
 | Kaitei Daisensou (Japan) (clone of: inthunt) | 1993 | Irem | kaiteids | Shooter / Misc. Horizontal | 0.00 |
 | Kaitei Takara Sagashi | 1980 | K.K. Tokki | kaitei | Misc. | 2.50 |
| Kaitei Takara Sagashi (Namco license) (clone of: kaitei) | 1980 | K.K. Tokki (Namco license) | kaitein | | 0.00 |
| | Kaiun Quiz (Japan, KW1/VER.A) | 1999 | Namco | kaiunqz | | 0.00 |
| | Kaleidoscope (011) (Qps) (Scorpion 4) (set 1) | 1969 | Qps | sc4kalei | | 0.00 |
| | Kaleidoscope (011) (Qps) (Scorpion 4) (set 3) (clone of: sc4kalei) | 1969 | Qps | sc4kaleib | | 0.00 |
| | Kaleidoscope (041) (Qps) (Scorpion 4) (set 2) (clone of: sc4kalei) | 1969 | Qps | sc4kaleia | | 0.00 |
| | Kaleidoscope (041) (Qps) (Scorpion 4) (set 4) (clone of: sc4kalei) | 1969 | Qps | sc4kaleic | | 0.00 |
| | Kaleidoscope (051) (Qps) (Scorpion 4) (set 1) (clone of: sc4kalei) | 1969 | Qps | sc4kaleid | | 0.00 |
| | Kaleidoscope (051) (Qps) (Scorpion 4) (set 2) (clone of: sc4kalei) | 1969 | Qps | sc4kaleie | | 0.00 |
