| Title | Publisher | Year | Language | Documents |
|---|---|---|---|---|
| Ultimatum, The | Street Games | 1986 | English | Solution |
| Unauthorized Termination | Richard Otter |
2006 | English | Solution |
| Under Cover of Darkness | Christopher Huang | 2000 | English | Solution, Map |
| Undertow | Stephen Granade | 1995 | English | Solution |
| Unsauberen Geschäften | Atari Bit Byter User Club (ABBUC) | 1982 | German | Solution |
| Upon Westminster Bridge | Magnetic Scrolls |
? | English | |
| Uptown | John H. Doolittle | 1990 | English |