| | X Factor (Empire) (MPU5) (set 1) | 1969 | Empire | m5xfact | | 0.00 |
| | X Factor (Empire) (MPU5) (set 2) (clone of: m5xfact) | 1969 | Empire | m5xfact02 | | 0.00 |
| | X Factor (Empire) (MPU5) (set 3) (clone of: m5xfact) | 1969 | Empire | m5xfact04 | | 0.00 |
| | X Factor (Empire) (MPU5) (set 4) (clone of: m5xfact) | 1969 | Empire | m5xfact11 | | 0.00 |
| | X Five Jokers (Version 1.12) | 1969 | Electronic Projects | x5jokers | | 0.00 |
| | X Force | 1987 | Tecnoplay | xforce | | 0.00 |
| | X Marks The Spot (Bellfruit) (Scorpion 4) (set 1) | 1969 | BFM | sc4xmark | | 6.00 |
| | X Marks The Spot (Bellfruit) (Scorpion 4) (set 2) (clone of: sc4xmark) | 1969 | BFM | sc4xmarka | | 0.00 |
| | X Marks The Spot (Maygay) (EPOCH) (1.4, set 3) (clone of: ep_xspot) | 1999 | Maygay | ep_xspotb | | 0.00 |
| | X Marks The Spot (Maygay) (EPOCH) (1.5, set 1) | 2002 | Maygay | ep_xspot | | 0.00 |
| | X Marks The Spot (Maygay) (EPOCH) (1.5, set 2) (clone of: ep_xspot) | 2002 | Maygay | ep_xspota | | 0.00 |
 | X Multiply (Japan, M72) (clone of: xmultipl) | 1989 | Irem | xmultiplm72 | | 0.00 |
| X Multiply (World, M81) | 1989 | Irem | xmultipl | Shooter / Flying Horizontal | 5.95 |
| | X Se Dae Quiz | 1995 | Dream Island | xsedae | | 0.00 |
| | X the Ball | 1991 | Rare | xtheball | | 2.00 |
| | X Tom 3D | 1999 | Jamie System Development | xtom3d | | 0.00 |
| | X's & O's | 1983 | Bally | xsandos | | 0.00 |
| | X-change (Bwb) (MPU4) (set 1) | 1969 | Bwb | m4xch | | 0.00 |
| | X-change (Bwb) (MPU4) (set 10) (clone of: m4xch) | 1969 | Bwb | m4xch__i | | 0.00 |
| | X-change (Bwb) (MPU4) (set 11) (clone of: m4xch) | 1969 | Bwb | m4xch__j | | 0.00 |
