| Extension | File Description |
| .FF | Game Files |
| .FF0 | Uncommon Files |
| .FF1 | Uncommon Files |
| .FF2 | Uncommon Files |
| .FF3 | Uncommon Files |
| .FF4 | Uncommon Files |
| .FF5 | Uncommon Files |
| .FF6 | Uncommon Files |
| .FF7 | Uncommon Files |
| .FF8 | Uncommon Files |
| .FF9 | Uncommon Files |
| .FFA | System Files |
| .FFB | Uncommon Files |
| .FFC | Uncommon Files |
| .FFD | Data Files |
| .FFDATA | Uncommon Files |
| .FFE | Uncommon Files |
| .FFF | Audio Files |
| .FFFF | Uncommon Files |
| .FFG | Uncommon Files |
| .FFH | Uncommon Files |
| .FFI | Uncommon Files |
| .FFIVW | Uncommon Files |
| .FFJ | Uncommon Files |
| .FFK | Uncommon Files |
| .FFL | Misc Files |
| .FFM | Uncommon Files |
| .FFN | Uncommon Files |
| .FFNA | Uncommon Files |
| .FFO | Data Files |
| .FFP | Uncommon Files |
| .FFQ | Uncommon Files |
| .FFR | Uncommon Files |
| .FFS | Uncommon Files |
| .FFT | Text Files |
| .FFU | Uncommon Files |
| .FFV | Uncommon Files |
| .FFW | Uncommon Files |
| .FFX | Settings Files |
| .FFY | Uncommon Files |
| .FFZ | Uncommon Files |
| .FG0 | Uncommon Files |
| .FG1 | Uncommon Files |
| .FG2 | Uncommon Files |
| .FG3 | Uncommon Files |
| .FG4 | Uncommon Files |
| .FG5 | Text Files |
| .FG6 | Uncommon Files |
| .FG7 | Uncommon Files |
| .FG8 | Uncommon Files |
| .FG9 | Uncommon Files |
| .FGA | Uncommon Files |
| .FGB | Uncommon Files |
| .FGC | Uncommon Files |
| .FGD | Game Files |
| .FGE | Uncommon Files |
| .FGF | Uncommon Files |
| .FGG | Uncommon Files |
| .FGH | Uncommon Files |
| .FGI | Uncommon Files |
| .FGJ | Uncommon Files |
| .FGK | Uncommon Files |
| .FGL | Developer Files |
| .FGM | Uncommon Files |
| .FGN | Uncommon Files |
| .FGO | Uncommon Files |
| .FGP | Uncommon Files |
| .FGQ | Uncommon Files |
| .FGR | Uncommon Files |
| .FGS | Uncommon Files |
| .FGT | Uncommon Files |
| .FGU | Uncommon Files |
| .FGV | Uncommon Files |
| .FGW | Uncommon Files |
| .FGX | Uncommon Files |
| Extension | File Description |
| .FGY | Uncommon Files |
| .FGZ | Uncommon Files |
| .FH | Backup Files |
| .FH0 | Uncommon Files |
| .FH1 | Uncommon Files |
| .FH10 | Vector Image Files |
| .FH11 | Vector Image Files |
| .FH2 | Uncommon Files |
| .FH3 | Uncommon Files |
| .FH4 | Uncommon Files |
| .FH5 | Uncommon Files |
| .FH6 | Uncommon Files |
| .FH7 | Vector Image Files |
| .FH8 | Vector Image Files |
| .FH9 | Vector Image Files |
| .FHA | Uncommon Files |
| .FHB | Uncommon Files |
| .FHC | Data Files |
| .FHD | Vector Image Files |
| .FHE | Uncommon Files |
| .FHF | Backup Files |
| .FHG | Uncommon Files |
| .FHH | Uncommon Files |
| .FHI | Uncommon Files |
| .FHIS | Uncommon Files |
| .FHJ | Uncommon Files |
| .FHK | Uncommon Files |
| .FHL | Uncommon Files |
| .FHM | Uncommon Files |
| .FHN | Uncommon Files |
| .FHO | Uncommon Files |
| .FHP | Uncommon Files |
| .FHQ | Uncommon Files |
| .FHR | Uncommon Files |
| .FHS | Uncommon Files |
| .FHT | Uncommon Files |
| .FHTML | Uncommon Files |
| .FHU | Uncommon Files |
| .FHV | Uncommon Files |
| .FHW | Uncommon Files |
| .FHX | Uncommon Files |
| .FHY | Uncommon Files |
| .FHZ | Uncommon Files |
| .FI | Uncommon Files |
| .FI0 | Uncommon Files |
| .FI1 | Uncommon Files |
| .FI2 | Uncommon Files |
| .FI3 | Uncommon Files |
| .FI4 | Uncommon Files |
| .FI5 | Uncommon Files |
| .FI6 | Uncommon Files |
| .FI7 | Uncommon Files |
| .FI8 | Uncommon Files |
| .FI9 | Uncommon Files |
| .FIA | Uncommon Files |
| .FIB | Uncommon Files |
| .FIC | Database Files |
| .FICONS | Uncommon Files |
| .FID | Data Files |
| .FIDDLE | Uncommon Files |
| .FIDO | Uncommon Files |
| .FIDX | Uncommon Files |
| .FIE | Uncommon Files |
| .FIF | Vector Image Files |
| .FIFF | Uncommon Files |
| .FIG | 3D Image Files |
| .FIGHT | Uncommon Files |
| .FIGURE | Uncommon Files |
| .FIH | Uncommon Files |
| .FII | Uncommon Files |
| .FIJ | Uncommon Files |
| .FIK | Uncommon Files |
| .FIL | Raster Image Files |
| .FILE | Misc Files |
| .FILEKILL | Uncommon Files |
