| Title | Publisher | Year | Language | Documents |
|---|---|---|---|---|
| Underground Adventure, An | Mark J. Welch | 1985 | English | |
| Uninvited | Icom Simulations, Mindscape | 1986 | English | Solution, Map |
| Unnkulia One-Half: The Salesman Triumphant | Adventions | 1993 | English | Solution |
| Unnkulia Zero: The Search for Amanda | Adventions | 1993 | English | Solution |
| Unnkulian Underworld: The Unknown Unventure | Adventions | 1990 | English | Solution |
| Unnkulian Unventure II: The Secret of Acme | Adventions | 1991 | English | Solution |