| .cty |
SimCity City File |
| .con |
Battlefield 1942 Configuration File |
| .cps |
The Powder Toy Save File |
| .cgz |
Cube Map File |
| .cdp |
Trainz Simulator Content Dispatcher Pack |
| .cdp2 |
Trainz Classics Content Dispatcher Pack 2 |
| .ct |
Cheat Engine Cheat Table |
| .cpx |
Oracle ADF Binding Context File |
| .cbf |
Calendar Builder File |
| .ctm |
Star Wars Republic Commando Map File |
| .cpn |
Age of Mythology Campaign File |
| .carc |
Nintendo DS Compressed Archive File |
| .cml |
Chemical Markup Language File |
| .cmap |
CmapTools Concept Map File |
| .cpk |
DTM Test Log File |
| .clt |
Clarity Legal Transcript File |
| .cbs |
Code Breaker PS2 Save File |
| .cos |
Capture One Settings File |
| .cbh |
ChessBase Database Header File |
| .cbv |
ChessBase Database File |
| .car |
Car Explorer Data File |
| .ctx |
Visual Basic Control Binary File |
| .compiled |
Compiled Game Resource File |
| .course |
Super Mario ReMaker Course File |