| Extension | File Description |
| .HF0 | Uncommon Files |
| .HF1 | Uncommon Files |
| .HF2 | Uncommon Files |
| .HF3 | Uncommon Files |
| .HF4 | Uncommon Files |
| .HF5 | Uncommon Files |
| .HF6 | Uncommon Files |
| .HF7 | Uncommon Files |
| .HF8 | Uncommon Files |
| .HF9 | Uncommon Files |
| .HFA | Uncommon Files |
| .HFB | Uncommon Files |
| .HFC | Uncommon Files |
| .HFD | Page Layout Files |
| .HFE | Uncommon Files |
| .HFF | Uncommon Files |
| .HFG | Uncommon Files |
| .HFH | Uncommon Files |
| .HFI | Uncommon Files |
| .HFJ | Uncommon Files |
| .HFK | Uncommon Files |
| .HFL | Uncommon Files |
| .HFM | Uncommon Files |
| .HFN | Uncommon Files |
| .HFO | Uncommon Files |
| .HFP | Uncommon Files |
| .HFQ | Uncommon Files |
| .HFR | Uncommon Files |
| .HFS | Disk Image Files |
| .HFT | Page Layout Files |
| .HFU | Uncommon Files |
| .HFV | Disk Image Files |
| .HFW | Uncommon Files |
| .HFX | Uncommon Files |
| .HFY | Uncommon Files |
| .HFZ | Uncommon Files |
| .HG0 | Uncommon Files |
| .HG1 | Uncommon Files |
| .HG2 | Uncommon Files |
| .HG3 | Uncommon Files |
| .HG4 | Uncommon Files |
| .HG5 | Uncommon Files |
| .HG6 | Uncommon Files |
| .HG7 | Uncommon Files |
| .HG8 | Uncommon Files |
| .HG9 | Uncommon Files |
| .HGA | Uncommon Files |
| .HGB | Uncommon Files |
| .HGC | Uncommon Files |
| .HGD | Uncommon Files |
| .HGE | Uncommon Files |
| .HGF | Uncommon Files |
| .HGG | Uncommon Files |
| .HGH | Uncommon Files |
| .HGI | Uncommon Files |
| .HGJ | Uncommon Files |
| .HGK | Uncommon Files |
| .HGL | Vector Image Files |
| .HGM | Uncommon Files |
| .HGN | Uncommon Files |
| .HGO | Uncommon Files |
| .HGP | Uncommon Files |
| .HGQ | Uncommon Files |
| .HGR | Uncommon Files |
| .HGS | Uncommon Files |
| .HGT | GIS Files |
| .HGU | Uncommon Files |
| .HGV | Uncommon Files |
| .HGW | Uncommon Files |
| .HGX | Uncommon Files |
| .HGY | Uncommon Files |
| .HGZ | Uncommon Files |
| .HH | Developer Files |
| .HH0 | Uncommon Files |
| .HH1 | Uncommon Files |
| Extension | File Description |
| .HH2 | Uncommon Files |
| .HH3 | Uncommon Files |
| .HH4 | Uncommon Files |
| .HH5 | Uncommon Files |
| .HH6 | Uncommon Files |
| .HH7 | Uncommon Files |
| .HH8 | Uncommon Files |
| .HH9 | Uncommon Files |
| .HHA | Uncommon Files |
| .HHB | Uncommon Files |
| .HHC | System Files |
| .HHD | Uncommon Files |
| .HHE | Uncommon Files |
| .HHF | Uncommon Files |
| .HHG | Uncommon Files |
| .HHH | Developer Files |
| .HHI | Uncommon Files |
| .HHJ | Uncommon Files |
| .HHK | System Files |
| .HHL | Uncommon Files |
| .HHM | Uncommon Files |
| .HHN | Uncommon Files |
| .HHO | Uncommon Files |
| .HHP | Uncommon Files |
| .HHQ | Uncommon Files |
| .HHR | Uncommon Files |
| .HHS | Uncommon Files |
| .HHT | Uncommon Files |
| .HHTML | Uncommon Files |
| .HHU | Uncommon Files |
| .HHV | Uncommon Files |
| .HHW | Uncommon Files |
| .HHX | Uncommon Files |
| .HHY | Uncommon Files |
| .HHZ | Uncommon Files |
| .HI | Game Files |
| .HI0 | Uncommon Files |
| .HI1 | Uncommon Files |
| .HI2 | Uncommon Files |
| .HI3 | Uncommon Files |
| .HI4 | Uncommon Files |
| .HI5 | Uncommon Files |
| .HI6 | Uncommon Files |
| .HI7 | Uncommon Files |
| .HI8 | Uncommon Files |
| .HI9 | Uncommon Files |
| .HIA | Uncommon Files |
| .HIB | Uncommon Files |
| .HIC | Uncommon Files |
| .HID | Settings Files |
| .HIE | Uncommon Files |
| .HIF | Data Files |
| .HIG | Uncommon Files |
| .HIGH | Uncommon Files |
| .HIH | Uncommon Files |
| .HIHAT | Uncommon Files |
| .HII | Uncommon Files |
| .HIJ | Uncommon Files |
| .HIK | Uncommon Files |
| .HIL | Uncommon Files |
| .HIM | Uncommon Files |
| .HIN | Uncommon Files |
| .HINT | Uncommon Files |
| .HINTS | Uncommon Files |
| .HINTS2 | Uncommon Files |
| .HIO | Uncommon Files |
| .HIP | 3D Image Files |
| .HIPS | Uncommon Files |
| .HIQ | Uncommon Files |
| .HIR | Uncommon Files |
| .HIR2 | Uncommon Files |
| .HIS | Database Files |
| .HIST | Uncommon Files |
| .HISTORY | Uncommon Files |
| .HIT | Game Files |
