| Title | Publisher | Year | Language | Documents |
|---|---|---|---|---|
| C.I.A. Adventure | CLOAD |
1980 | English | Solution, Map, Fixed game |
| Castlequest | GEnie |
1980 | English | Map |
| Cavern of Riches | Keypunch Software | 1980 | English | Solution, Map |
| Cells and Serpents | Argus Press Software, ASP Software | 1980 | English | |
| City Adventure | Software Innovations | 1980 | English | |
| Curse of the Sasquatch | Mad Hatter Software | 1980 | English | Solution, Map |