| ID | Title | Machine | Language |
|---|---|---|---|
| 31743 | Othello | ZX81 16K | - |
| 31957 | Othello | ZX81 16K | English |
| 37483 | Othello Reversi | ZX81 16K | French |
| 41596 | Outer Space | ZX81 16K | English |
| 35653 | Outsch | ZX81 16K | English |
| 40476 | Owzat! | ZX81 16K | English |
| 40718 | Oxo | ZX81 16K | English |
| 40505 | Oxygen Alert | ZX81 16K | English |
| 39210 | PAYE | ZX81 16K | English |
| 39954 | PEEK Averaging for ROM | ZX81 16K | English |
| 38771 | PERT-CPM | ZX81 16K | Portuguese |
| 38607 | PERT/CPM | ZX81 16K | Portuguese |
| 39953 | PRINT USING Routine | ZX81 16K | English |
| 29201 | PROSSESO | ZX81 16K | English |
| 31745 | Pac Rabbit | ZX81 16K | - |
| 29149 | Pac-81 | ZX81 16K | English |
| 37392 | Pac-Man | ZX81 16K | French |
| 34543 | Pac-Man | ZX81 16K | English |
| 34544 | Pac-Man Video | ZX81 16K | English |
| 28562 | Pack-8 | ZX81 16K | Spanish |