| Title | Publisher | Year | Language | Documents |
|---|---|---|---|---|
| Caso cerrado II: El pueblo | Papada Soft | 1998 | Spanish | |
| Cattus Atrox | David A. Cornelson | 1998 | English | Solution, Map |
| CC | Mikko Vuorinen | 1998 | English | Solution |
| Chicken and Egg | Adam Thornton | 1998 | English | |
| Chicken Under the Window, The | Lucian Paul Smith | 1998 | English | Solution |
| Chicken! | Gunther Schmidl | 1998 | English | Solution, Map |
| Chicken's Dilemma | Jason Dyer |
1998 | English | |
| Chickens of Distinction | Liza Daly | 1998 | English | |
| City, The | Sam Barlow | 1998 | English | Solution |
| Coffins | Christopher Huang | 1998 | English | Solution, Map |
| Coming Out of the Closet | Mikko Vuorinen | 1998 | English | |
| Commute, The | Kevin Copeland | 1998 | English | Solution |