| crs | Stepmania Course Data |
| cry | CryENGINE Map Data |
| crysisjmsf | Crysis Saved Game |
| crysispsf | Crysis Warhead Saved Game |
| cs | Tribes 2 Game Script |
| cs2 | Cosmic Break CS2 Skin |
| csc | 18 Wheels of Steel CSC Data |
| csl | Anno 2070 Script |
| csmp | Metroid Prime 3 Audio |
| ct4 | 1000 Miglia Game Data |
| ctl | Stepmania Package Description |
| cty | SimCity City Data |
| cvf | Train Simulator Cab View Data |
| cvm | Odin Sphere Game Data |
| cw1 | Creeper World Game Map Data |
| cw2 | Creeper World 2 Map Data |
| cwd | Cardwar Cards deck |
| cwg | Castle of the Winds Data |
| cyr | Crysis Game Data |
| d | Infinity Engine Dialogue Data |
| d1bank | MechAssault Audio Data |
| d2i | ATMA Diablo II Items Data |
| d2p | Diablo 2 Packet Data |
| d2s | Diablo 2 Saved Game |
| d2u | Deus Ex: Invisible War Data |
| d2x | Diablo 2 Player Stash Data |
| d3c | Descent 3 Data |
| d3dbsp | Call of Duty Map Data |
| d3f | MechCommander 2 Encyclopedia File |
| d3l | Descent 3 Level Data |
| d3m | Descent 3 Data |
| d3s | DRIV3R D3S Data |
| da1 | AGT Game Data |
| da2 | AGT Game Data |
| da3 | AGT Game Data |
