| Title | Publisher | Year | Language | Documents |
|---|---|---|---|---|
| Calling All Heroes | Nate Cull | 1996 | English | |
| Captivity | Jim Aikin | 2020 | English | |
| Castle of Doom | Bad Dog Studios | 2015 | English | |
| Cerulean Stowaway | Roger Descheneaux | 2003 | English | |
| Chancellor | Kevin Venzke | 2005 | English | Hints |
| Chaos | Shay Caron | 1999 | English | |
| Cloak of Darkness | Roger Firth | 1999 | English | Solution, Map |
| Clock, The | Cleopatra Kozlowski | 2000 | English | Solution |
| Coast House, The | Stephen Newton | 2001 | English | Solution, Map |
| Coffee Quest II | Dog Solitude | 2002 | English | Solution |
| Color and Number | Steven Kollmansberger | 2002 | English | Solution |
| Common Ground | Stephen Granade | 1999 | English | |
| Comp02ter Game | Brendan Barnwell | 2002 | English | |
| Concrete Paradise | Tyson Ibele | 2002 | English | Solution |
| Cruise, The | Norman Perlmutter | 2001 | English | |
| Curse of Vengeance | Scott C. McNab | 1992 | English |