| Short name | Description | Year | Manufacturer | Runnable | Parent |
|---|---|---|---|---|---|
| mastboy | Master Boy (Spanish, rev A) | 1991 | Gaelco | Yes | |
| mastboya | Master Boy (Spanish, rev A, hack?) | 1991 | Gaelco | Yes | mastboy |
| mastboyi | Master Boy (Italian, rev A, set 1) | 1991 | Gaelco (Playmark license) | Yes | mastboy |
| mastboyia | Master Boy (Italian, rev A, set 2) | 1991 | Gaelco (Playmark license) | Yes | mastboy |
| mastboyiv2 | Master Boy Version II (Italian, rev A) | 1992 | Gaelco (Playmark license) | Yes | mastboy |