| Title | Publisher | Year | Language | Documents |
|---|---|---|---|---|
| Water Bird, The | Athan Skelley | 1999 | English | Solution |
| When I Grow Up I Want To Be A Firetruck | Rob Noyes | 1999 | English | Solution, Map |
| Winchester's Nightmare | Nick Montfort |
1999 | English | |
| Winter Wonderland | Laura A. Knauth | 1999 | English | Solution |
| Wolf | Z-Zero Systems | 1999 | Russian | |
| Wolf 2 | Z-Zero Systems | 1999 | Russian | |
| Wolf 3 | Z-Zero Systems | 1999 | Russian | |
| Worlds Apart | Suzanne Britton | 1999 | English |