| | Korma Chameleon Club (Empire) (MPU5) | 1969 | Empire | m5kormcl | | 0.00 |
| | Koro Koro Quest (Japan) | 1999 | Takumi | korokoro | | 0.00 |
 | Korosuke Roller (Japan) (clone of: crush) | 1981 | Alpha Denshi Co. / Kural Electric, Ltd. | korosuke | Maze | 0.00 |
 | Kosmo Killer (clone of: kamikaze) (sample of: invaders) | 1969 | bootleg | kosmokil | | 0.00 |
 | Kosodate Quiz My Angel (Japan) | 1996 | Namco | myangel | Quiz / Japanese | 0.00 |
 | Kosodate Quiz My Angel 2 (Japan) | 1997 | Namco | myangel2 | Quiz / Japanese | 0.00 |
 | Kosodate Quiz My Angel 3 (Japan, KQT1/VER.A) | 1998 | Namco | myangel3 | Quiz / Japanese | 7.17 |
| | Kotoba no Puzzle Mojipittan (Japan, KPM1 Ver.A) | 2001 | Namco | knpuzzle | | 0.00 |
 | Koukuu Kihei Monogatari - The Legend of Air Cavalry (Japan) (clone of: chopper) | 1988 | SNK | legofair | Shooter / Flying Vertical | 0.00 |
 | Koutetsu Yousai Strahl (Japan set 1) | 1992 | UPL | strahl | Shooter / Flying Horizontal | 6.25 |
| Koutetsu Yousai Strahl (Japan set 2) (clone of: strahl) | 1992 | UPL | strahla | Shooter / Flying Horizontal | 0.00 |
 | Kozmik Kroozr | 1982 | Bally Midway | kroozr | Shooter / Field | 4.50 |
| | Kozure Ookami (Japan) | 1987 | Nichibutsu | kozure | | 6.86 |
 | Kram (encrypted) (clone of: kram) | 1982 | Taito America Corporation | kram3 | Maze | 0.00 |
| Kram (set 1) | 1982 | Taito America Corporation | kram | Maze | 7.50 |
| Kram (set 2) (clone of: kram) | 1982 | Taito America Corporation | kram2 | Maze | 0.00 |
 | Krazy Bowl | 1994 | American Sammy | krzybowl | Sports / Bowling | 4.10 |
 | Krull | 1983 | Gottlieb | krull | Shooter / Field | 5.00 |
| | Krull (Pinball) | 1983 | Gottlieb | krullp | | 0.00 |
| | Krypton Factor (Maygay M2) | 1969 | Maygay | mg_kf | | 0.00 |
