| Extension | File Description |
| .HTX | Web Files |
| .HTY | Uncommon Files |
| .HTZ | Uncommon Files |
| .HU | Uncommon Files |
| .HU0 | Uncommon Files |
| .HU1 | Uncommon Files |
| .HU2 | Uncommon Files |
| .HU3 | Uncommon Files |
| .HU4 | Uncommon Files |
| .HU5 | Uncommon Files |
| .HU6 | Uncommon Files |
| .HU7 | Uncommon Files |
| .HU8 | Uncommon Files |
| .HU9 | Uncommon Files |
| .HUA | Uncommon Files |
| .HUB | Uncommon Files |
| .HUC | Uncommon Files |
| .HUD | Uncommon Files |
| .HUE | Uncommon Files |
| .HUF | Uncommon Files |
| .HUG | Uncommon Files |
| .HUH | Data Files |
| .HUI | Uncommon Files |
| .HUJ | Uncommon Files |
| .HUK | Uncommon Files |
| .HUL | Uncommon Files |
| .HULL | Uncommon Files |
| .HUM | Uncommon Files |
| .HUN | Uncommon Files |
| .HUO | Uncommon Files |
| .HUP | Uncommon Files |
| .HUQ | Uncommon Files |
| .HUR | Uncommon Files |
| .HUS | CAD Files |
| .HUT | Uncommon Files |
| .HUU | Uncommon Files |
| .HUV | Uncommon Files |
| .HUW | Uncommon Files |
| .HUX | Uncommon Files |
| .HUY | Uncommon Files |
| .HUZ | Uncommon Files |
| .HV0 | Uncommon Files |
| .HV1 | Uncommon Files |
| .HV2 | Uncommon Files |
| .HV3 | Uncommon Files |
| .HV4 | Uncommon Files |
| .HV5 | Uncommon Files |
| .HV6 | Uncommon Files |
| .HV7 | Uncommon Files |
| .HV8 | Uncommon Files |
| .HV9 | Uncommon Files |
| .HVA | Uncommon Files |
| .HVB | Uncommon Files |
| .HVC | Uncommon Files |
| .HVD | Uncommon Files |
| .HVE | Uncommon Files |
| .HVF | Uncommon Files |
| .HVG | Uncommon Files |
| .HVH | Uncommon Files |
| .HVI | Uncommon Files |
| .HVJ | Uncommon Files |
| .HVK | Uncommon Files |
| .HVL | Uncommon Files |
| .HVM | Uncommon Files |
| .HVN | Uncommon Files |
| .HVO | Uncommon Files |
| .HVP | Data Files |
| .HVQ | Uncommon Files |
| .HVR | Uncommon Files |
| .HVS | Data Files |
| .HVT | Uncommon Files |
| .HVU | Uncommon Files |
| .HVV | Uncommon Files |
| .HVW | Uncommon Files |
| .HVX | Uncommon Files |
| Extension | File Description |
| .HVY | Uncommon Files |
| .HVZ | Uncommon Files |
| .HW | Uncommon Files |
| .HW0 | Uncommon Files |
| .HW1 | Uncommon Files |
| .HW2 | Uncommon Files |
| .HW3 | Uncommon Files |
| .HW4 | Uncommon Files |
| .HW5 | Uncommon Files |
| .HW6 | Uncommon Files |
| .HW7 | Uncommon Files |
| .HW8 | Uncommon Files |
| .HW9 | Uncommon Files |
| .HWA | Uncommon Files |
| .HWB | Uncommon Files |
| .HWC | Uncommon Files |
| .HWCFG | Uncommon Files |
| .HWD | Game Files |
| .HWE | Uncommon Files |
| .HWF | Uncommon Files |
| .HWG | Uncommon Files |
| .HWH | Uncommon Files |
| .HWI | Uncommon Files |
| .HWJ | Uncommon Files |
| .HWK | Uncommon Files |
| .HWL | Uncommon Files |
| .HWM | Uncommon Files |
| .HWN | Uncommon Files |
| .HWO | Uncommon Files |
| .HWP | Text Files |
| .HWPROJ | Uncommon Files |
| .HWQ | Uncommon Files |
| .HWR | Uncommon Files |
| .HWS | Uncommon Files |
| .HWT | Uncommon Files |
| .HWU | Uncommon Files |
| .HWV | Uncommon Files |
| .HWW | Uncommon Files |
| .HWX | Uncommon Files |
| .HWY | Uncommon Files |
| .HWZ | Uncommon Files |
| .HX | Uncommon Files |
| .HX0 | Uncommon Files |
| .HX1 | Uncommon Files |
| .HX2 | Uncommon Files |
| .HX3 | Uncommon Files |
| .HX4 | Uncommon Files |
| .HX5 | Uncommon Files |
| .HX6 | Uncommon Files |
| .HX7 | Uncommon Files |
| .HX8 | Uncommon Files |
| .HX9 | Uncommon Files |
| .HXA | Uncommon Files |
| .HXB | Uncommon Files |
| .HXC | Misc Files |
| .HXCONV | Uncommon Files |
| .HXD | Uncommon Files |
| .HXE | Uncommon Files |
| .HXF | Uncommon Files |
| .HXG | Uncommon Files |
| .HXH | Uncommon Files |
| .HXI | Uncommon Files |
| .HXJ | Uncommon Files |
| .HXK | Misc Files |
| .HXL | Uncommon Files |
| .HXM | Game Files |
| .HXML | Uncommon Files |
| .HXN | Uncommon Files |
| .HXO | Uncommon Files |
| .HXP | Uncommon Files |
| .HXQ | Uncommon Files |
| .HXR | Uncommon Files |
| .HXS | Web Files |
| .HXT | Misc Files |
| .HXU | Uncommon Files |
