| .col |
Capture One Session File |
| .cht |
Emulator Cheat File |
| .cm |
CLEO Custom Mission |
| .cfge |
Jewel Quest Configuration File |
| .cfr |
Cross Fire Replay File |
| .crs |
StepMania Course File |
| .c4k |
Clonk Key File |
| .cme |
Crazy Machines Experiment File |
| .cns |
M.U.G.E.N. Character States File |
| .civ5save |
Civilization 5 Saved Game |
| .cli |
Grand Theft Auto Clip Data File |
| .civ5mod |
Civilization 5 Mod File |
| .civ5map |
Civilization 5 Map |
| .cwd |
Nonogram Puzzle File |
| .civ5sln |
Civilization 5 Solution File |
| .cia |
CTR Importable Archive |
| .cetrainer |
Cheat Engine Trainer File |
| .comfycakessave-ms |
Comfy Cakes Saved Game |
| .cem |
Children of the Nile Model File |
| .chesstitanssave-ms |
Microsoft Chess Titans Saved Game |
| .craft |
KSP Spacecraft File |
| .crysisjmsf |
Crysis Saved Game |
| .crysispsf |
Crysis Warhead Saved Game |
| .chr0 |
Wii Model Animation File |