| ID | Title | Machine | Language |
|---|---|---|---|
| 31856 | Tyrant of Athens | ZX81 16K | - |
| 31980 | U-Bend | ZX81 16K | English |
| 41570 | U-Boat | ZX81 16K | English |
| 35725 | U.F.O | ZX81 16K | English |
| 31857 | UDG | ZX81 16K | - |
| 31858 | UFO | ZX81 16K | - |
| 31859 | UFO + 3D Maze | ZX81 16K | - |
| 29412 | UFO - Invasie | ZX81 16K | Dutch |
| 32064 | UHR | ZX81 16K | German |
| 40888 | UK Map | ZX81 16K | English |
| 32065 | UPPERlowerfont | ZX81 16K | English |
| 29193 | US Presidents Quiz part 1 | ZX81 16K | English |
| 35726 | USA Flag | ZX81 16K | English |
| 38121 | Umul Gonu | ZX81 16K | English |
| 29413 | Umzingelung | ZX81 16K | German |
| 41073 | Undercut | ZX81 16K | English |
| 40753 | Understanding Angles | ZX81 16K | English |
| 41583 | Union Jack | ZX81 16K | English |
| 40856 | Universal Patterner | ZX81 16K | English |
| 29415 | Unwetter | ZX81 16K | German |