| 24920 | One Arm Bandit | ZX-Spectrum 48K | English |
| 16727 | One Arm Bandit | ZX-Spectrum 48K | English |
| 10882 | One Dark Night | ZX-Spectrum 48K | English |
| 25865 | One Day Cricket | ZX-Spectrum 48K | English |
| 39779 | One Day Cricket | ZX-Spectrum 48K | English |
| 2891 | One Day Cricket | ZX-Spectrum 48K | English |
| 14 | One Hundred and Eighty! | ZX-Spectrum 48K | English |
| 42665 | One Key Tapeworm | ZX-Spectrum 48K | English |
| 24170 | One Line Flight Simulator | ZX-Spectrum 48K | English |
| 3523 | One Man and His Droid | ZX-Spectrum 48K | English |
| 25599 | One Man and His Job | ZX-Spectrum 48K | English |
| 3522 | One for the Road | ZX-Spectrum 48K | English |
| 12349 | One for the Road + Mutations | ZX-Spectrum 48K | English |
| 6759 | One of our Wombats is Missing | ZX-Spectrum 48K | English |
| 3526 | One on One | ZX-Spectrum 48K | English |
| 10016 | One-Arm Bandit | ZX-Spectrum 48K | English |
| 25598 | Onefinga | ZX-Spectrum 48K | English |
| 27418 | Only You | ZX-Spectrum 48K | English |
| 3527 | Oops | ZX-Spectrum 48K | English |
| 23905 | Op-Amp | ZX-Spectrum 48K | English |