| | Kings & Queens Club (Empire) (MPU5) (set 3) (clone of: m5kingqc) | 1969 | Empire | m5kingqc07 | | 0.00 |
| | Kings & Queens Club (Empire) (MPU5) (set 4) (clone of: m5kingqc) | 1969 | Empire | m5kingqc08 | | 0.00 |
| | Kings & Queens Club (Newby) (MPU4) | 1969 | Newby | m4kqclub | | 0.00 |
| | Kings Club (Bellfruit) (Dutch) (Scorpion 1) | 1969 | BFM/ELAM | sc1kings | | 0.00 |
| | Kings of Steel | 1984 | Bally | kosteel | | 0.00 |
| | Kinnikuman Muscle Grand Prix (KN1 Ver. A) | 2006 | Namco | kinniku | | 0.00 |
 | Kirameki Star Road (Ver 2.10J 1997/08/29) | 1997 | Taito Corporation | kirameki | Quiz / Japanese | 9.19 |
 | Kisekae Hanafuda | 1995 | I'Max | kisekaeh | Unplayable | 0.00 |
 | Kisekae Mahjong | 1995 | I'Max | kisekaem | Unplayable | 1.00 |
| | Kiss | 1979 | Bally | kiss | | 0.00 |
| | Kiss (prototype) (clone of: kiss) | 1979 | Bally | kissp | | 0.00 |
 | Kitten Kaboodle | 1988 | Konami | kittenk | Puzzle | 3.33 |
 | Kizuna Encounter - Super Tag Battle / Fu'un Super Tag Battle | 1996 | SNK | kizuna | Fighter / Versus | 6.61 |
| | Kkot No Li (Kill the Bees) | 1969 | hack | kkotnoli | | 0.00 |
| | Klad / Labyrinth (Photon System) | 1969 | | phklad | | 5.60 |
 | Klax (Germany) (clone of: klax) | 1989 | Atari Games | klaxd | Puzzle / Drop | 0.00 |
| Klax (Japan) (clone of: klax) | 1989 | Atari Games | klaxj | Puzzle / Drop | 0.00 |
| Klax (prototype set 1) (clone of: klax) | 1989 | Atari Games | klaxp1 | Puzzle / Drop | 0.00 |
| Klax (prototype set 2) (clone of: klax) | 1989 | Atari Games | klaxp2 | Puzzle / Drop | 0.00 |
| Klax (set 1) | 1989 | Atari Games | klax | Puzzle / Drop | 5.65 |
