| hpk | Tropico 3 Game Data |
| hps | HPL2 Script |
| hqr | Little Big Adventure Scene Data File |
| hsd | Highway Pursuit Game Data |
| hsv | Diablo: Hellfire Single Player Character Data |
| htg | HackTheGame Mission Pack |
| hul | Re-Volt Collision Data |
| hum | OMSI Human Configuration File |
| hva | Command and Conquer:Tiberian Sun Game Data |
| hvd | Highway Pursuit Game Data |
| hvp | Obscure Game Data |
| hwd | Hedgewars Demo |
| hwmap | Hedgewars Drawn Map |
| hws | Hedgewars Saved Game |
| i3chr | Point Blank Game Data |
| i3pack | Point Blank Game Data |
| i3s | Point Blank Game Data |
| iao | ImperiumAO Game Data |
| ib2 | IncrediBots 2 Saved Challenge |
| ibre | IncrediBots Saved Replay |
| ibro | IncrediBots Robot |
| ibt | Texture and Model Data |
| idm | Indigo Prophecy Game Archive |
| idx0 | Runescape Cache Index |
| idx255 | Runescape Cache |
| iex | The Tuttles Madcap Misadventures Data |
| ifo | Bioware Information File |
| ifr | Formula One 2001 Game Data |
| ig2 | Industry Giant 2 Map |
| ik | CryENGINE IK Animation |
| ikl | InkBall Game Data |
| ill | Picross Puzzle Data |
| ima3 | Lock On AddOn Data |
| imgb | Final Fantasy XIII Model |
| inibin | League of Legends Data |
