| .he4 |
Humongous Entertainment Sound Archive |
| .hof |
OMSI Map Parameter File |
| .hxm |
Descent 2 Resource Modification |
| .hhsl |
Hockey High Score List File |
| .hmp |
Worms Height Map File |
| .img |
Disc Image Data File |
| .iwd |
Call of Duty Game Data File |
| .ins |
LaTeX Installer Script |
| .ivt |
International Volleyball 2006 Data File |
| .ibt |
Texture and Model File |
| .inp |
Urdu InPage Document |
| .ips |
Internal Patching System Patch File |
| .info |
Texinfo Document |
| .isr |
GoMoku Game File |
| .idx0 |
Runescape Cache Index File |
| .idx255 |
Runescape Cache File |
| .ide |
GTA Item Definition File |
| .ipl |
GTA Item Placement File |
| .inform |
Inform Project |
| .int |
Fallout Compiled Script |
| .inv |
INVedit File |
| .itr |
Icy Tower Replay File |
| .ifp |
GTA Animation File |
| .ibre |
IncrediBots Replay File |