| Short name | Description | Year | Manufacturer | Runnable | Parent |
|---|---|---|---|---|---|
| enigma2 | Enigma II | 1981 | Zilec Electronics (Game Plan license) | Yes | |
| enigma2a | Enigma II (Space Invaders hardware) | 1984 | Zilec Electronics | Yes | enigma2 |
| enigma2b | Phantoms II (Space Invaders hardware) | 1981 | Zilec Electronics | Yes | enigma2 |