| galapx | galaxian | Galaxian Part X (hack of 'Moon Alien') | hack | 1979 |
| galaxian | | Galaxian (Namco set 1) | Namco | 1979 |
| galaxiana | galaxian | Galaxian (Namco set 2) | Namco | 1979 |
| galaxianbl | galaxian | Galaxian (bootleg, set 2) | bootleg | 1979 |
| galaxianbl2 | galaxian | Galaxian (bootleg, set 4) | bootleg | 1979 |
| galaxianbl3 | galaxian | Galaxian (Spanish bootleg) | bootleg | 1979 |
| galaxianem | galaxian | Galaxian (Electromar Spanish bootleg) | bootleg (Electromar) | 1980 |
| galaxiani | galaxian | Galaxian (Irem) | Namco (Irem license) | 1979 |
| galaxianiii | galaxian | Galaxian III (bootleg of Galaxian) | bootleg | 1979 |
| galaxianm | galaxian | Galaxian (Midway set 1) | Namco (Midway license) | 1979 |
| galaxianmo | galaxian | Galaxian (Midway set 2) | Namco (Midway license) | 1979 |
| galaxianrp | galaxian | Galaxian (Rene Pierre bootleg) | bootleg (Valadon Automation / Rene Pierre) | 1979 |
| galaxiant | galaxian | Galaxian (Taito) | Namco (Taito license) | 1979 |
