| Title | Publisher | Year | Language | Documents |
|---|---|---|---|---|
| CC | Mikko Vuorinen | 1998 | English | Solution |
| Chasing, The | Anssi Räisänen | 2001 | English | Solution, Map |
| Christmas Party, The | OldGrover | 2007 | English | |
| City of Dead Leaves | Felix Pleşoianu | 2016 | English | |
| Cloak of Darkness | Roger Firth | 1999 | English | Map, Solution |
| Colossal Cave Adventure | ? | 2008 | English | |
| Coming Out of the Closet | Mikko Vuorinen | 1998 | English | |
| Crystal Ball | Marian Taylor | 1999 | English |