| 3549 | Osten | ZX-Spectrum 16K | Danish |
| 3550 | Ostron | ZX-Spectrum 16K | English |
| 3553 | Othello | ZX-Spectrum 16K | - |
| 3554 | Othello | ZX-Spectrum 16K | English |
| 27049 | Othello | ZX-Spectrum 16K | French |
| 18712 | Othello | ZX-Spectrum 16K | English |
| 18984 | Othello | ZX-Spectrum 16K | English |
| 14051 | Othello | ZX-Spectrum 16K | English |
| 27048 | Othello + Isola | ZX-Spectrum 16K | French |
| 42889 | Othelo | ZX-Spectrum 16K | Spanish |
| 34382 | Otro de Invasores | ZX-Spectrum 16K | Spanish |
| 43120 | Over and Over | ZX-Spectrum 16K | English |
| 11317 | Over the Spectrum Cassette 1 | ZX-Spectrum 16K | English |
| 11318 | Over the Spectrum Cassette 2 | ZX-Spectrum 16K | English |
| 11974 | Over the Spectrum Cassette 3 | ZX-Spectrum 16K | English |
| 42630 | Overis | ZX-Spectrum 16K | English |
| 18422 | Overtake | ZX-Spectrum 16K | English |
| 31167 | Overtake the POPE 2 | ZX-Spectrum 16K | English |
| 31117 | Overtake the Pope | ZX-Spectrum 16K | English |
| 37638 | P.P.S. - Pixel Perfect Shot | ZX-Spectrum 16K | English |