| Title | Publisher | Year | Language | Documents |
|---|---|---|---|---|
| Ultimate Nightmare | Tony Kingsmill |
1992 | English | Solution |
| Ultimate Prize, The | Heyley Software |
1986 | English | Solution, Clue sheet |
| Underground Adventure | Duckworth Home Computing |
1983 | English | Solution, Map |
| Underground Escape | Jon Ripley |
1996 | English | Solution |
| Uranium Factor, The | A&F Software |
1985 | English |