| 38672 | Under Pressure | ZX-Spectrum 16K | English |
| 41073 | Undercut | ZX81 16K | English |
| 5514 | Underground | ZX-Spectrum 48K | Spanish |
| 5515 | Underground | ZX-Spectrum 48K | English |
| 17160 | Underground | ZX-Spectrum 48K | Spanish |
| 36751 | Underground II | ZX-Spectrum 128K | Russian |
| 5517 | Unitrax | ZX-Spectrum 48K | English |
| 23706 | UniverseStars | ZX-Spectrum 48K | German |
| 26036 | Unload the Cargo | ZX-Spectrum 48K | English |
| 15811 | Unresident Evil | ZX-Spectrum 48K | English |
| 15812 | Unresident Evil 2: Escape from the Courtyard | ZX-Spectrum 48K | English |
| 15813 | Unresident Evil 3: Enter the Laboratory | ZX-Spectrum 48K | English |
| 15814 | Unresident Evil 4: The Final Showdown | ZX-Spectrum 48K | English |
| 10358 | Up 'n Down | ZX-Spectrum 48K | English |
| 34594 | Up-Cake | ZX81 16K | English |
| 34728 | Upman | ZX-Spectrum 48K | English |
| 36541 | Uranus Penetrator | ZX-Spectrum 48K | English |
| 38122 | Uranus Penetrator III: The Hunt For Number Two | ZX-Spectrum 48K | English |
| 30189 | Uroboros | ZX-Spectrum 48K/128K | English |
| 43256 | Urok | ZX-Spectrum 128K | Multi-language: English, Spanish |