| Title | Publisher | Year | Language | Documents |
|---|---|---|---|---|
| Ula Tor | Ragnar Fyri | 1990 | English | Solution, Hints |
| Unknown Planet | Amstrad User, The, Strategy Publications | 1990 | English | Solution |
| Unnkulian Underworld: The Unknown Unventure | Adventions | 1990 | English | Solution |
| Unter Der Erde | Richard Gresser | 1990 | German | Solution |
| Uptown | John H. Doolittle | 1990 | English |