| 40485 | Octopus | ZX81 16K | English |
| 30638 | Octopus Lite | ZX-Spectrum 16K | English |
| 37634 | Octopus Mating Simulator | ZX-Spectrum 16K | English |
| 34636 | Octukitty | ZX-Spectrum 48K/128K | English |
| 22347 | Octunes | ZX-Spectrum 128K | English |
| 3488 | Odd Ball | ZX-Spectrum 48K | English |
| 3489 | Odd Job Eddie | ZX-Spectrum 128K | English |
| 39688 | Odd One Out | ZX-Spectrum 48K | English |
| 29600 | Odd One Out | ZX81 16K | English |
| 44105 | Odd One Out | ZX-Spectrum 16K/48K | English |
| 14006 | Odd One Out | ZX-Spectrum 48K | English |
| 29601 | Odds and Evens | ZX81 1K | English |
| 42376 | Odds and Evens Classic | ZX80 | English |
| 10010 | Odds on | ZX-Spectrum 16K | English |
| 32386 | Odieu's Quest for the Magic Flingshot (ZxZvm) | ZX-Spectrum 128 +3 | English |
| 7623 | Odysseus Party Minishow | ZX-Spectrum 128K | English |
| 34542 | Odyssey | ZX81 16K | English |
| 3491 | Odyssey 1 | ZX-Spectrum 16K | English |
| 7624 | Oei | ZX-Spectrum 48K | English |
| 32387 | Of Forms Unknown - An Interactive Excursion (ZxZvm) | ZX-Spectrum 128 +3 | English |