| 3546 | Oriental Hero | ZX-Spectrum 48K | English |
| 43756 | Orientação | ZX-Spectrum 48K | Portuguese |
| 38394 | Orientační inventář | ZX-Spectrum 48K | Czech |
| 3547 | Orion | ZX-Spectrum 48K | Czech |
| 3548 | Orion | ZX-Spectrum 48K | English |
| 25665 | Orion Digital Sound Recorder | ZX-Spectrum 48K | Russian |
| 24852 | Orion Quest | ZX-Spectrum 48K | English |
| 17844 | Orion-1 | ZX-Spectrum 48K | Spanish |
| 14898 | Orion-7 | ZX-Spectrum 48K | Spanish |
| 22055 | Orkenvandringen | ZX-Spectrum 48K | English |
| 9150 | Orm and Cheep: Narrow Squeaks | ZX-Spectrum 48K | English |
| 9151 | Orm and Cheep: The Birthday Party | ZX-Spectrum 48K | English |
| 17168 | Ormuz | ZX-Spectrum 48K | Spanish |
| 8268 | Oroscopo | ZX-Spectrum 48K | Italian |
| 16403 | Oroset | ZX-Spectrum 48K | Spanish |
| 10021 | Orsis | ZX-Spectrum 48K | English |
| 27110 | Orson Powell: Lycanthropus | ZX-Spectrum 48K | Italian |
| 43482 | Ortografia | ZX-Spectrum 48K | Portuguese |
| 37546 | Ortografia | ZX-Spectrum 48K | Spanish |
| 8525 | Ortografia | ZX-Spectrum 48K | Polish |