| 36803 | Oradot 2 | ZX-Spectrum 48K | Czech |
| 21069 | Oragon | ZX-Spectrum 48K | Russian |
| 40223 | Orange | ZX-Spectrum 48K | English |
| 40820 | Orange Border | ZX-Spectrum 48K | English |
| 6767 | Orb | ZX-Spectrum 48K | English |
| 39539 | Orba | ZX-Spectrum 48K | Czech |
| 16708 | Orbis Pictus - Angličtina 1 | ZX-Spectrum 48K | Czech |
| 16714 | Orbis Pictus - Němčina 1 | ZX-Spectrum 48K | Czech |
| 44515 | Orbis Pictus - Němčina 2 | ZX-Spectrum 48K | Czech |
| 17112 | Orbit | ZX-Spectrum 48K | English |
| 30479 | Orbit | ZX-Spectrum 48K | English |
| 24041 | Orbit | ZX-Spectrum 48K | English |
| 10886 | Orbit of Doom | ZX-Spectrum 48K | English |
| 3541 | Orbix the Terrorball | ZX-Spectrum 48K | English |
| 3542 | Orc Attack | ZX-Spectrum 48K | English |
| 6768 | Orc Island | ZX-Spectrum 48K | English |
| 6770 | Orc Slayer | ZX-Spectrum 48K | English |
| 14621 | Orcamento Domestico | ZX-Spectrum 48K | Portuguese |
| 15172 | Orchard Thief | ZX-Spectrum 48K | English |
| 15300 | Ordenador Educativo issue 01 | ZX-Spectrum 48K | Spanish |