| hvp | Obscure Game Data |
| hwd | Hedgewars Demo |
| hwmap | Hedgewars Drawn Map |
| hws | Hedgewars Saved Game |
| hxm | Descent 2 Resource Modification |
| i3a | Point Blank Game Data |
| i3chr | Point Blank Game Data |
| i3exec | Point Blank Game Data |
| i3pack | Point Blank Game Data |
| i3s | Point Blank Game Data |
| iai | Delta Force Game Item Attributes Info |
| iao | ImperiumAO Game Data |
| ib2 | IncrediBots 2 Saved Challenge |
| ib3 | IncrediBots 3 Saved Challenge |
| ibch | IncrediBots Challenge Data |
| ibi | Raven Software ICARUS Compiled Script |
| ibre | IncrediBots Saved Replay |
| ibro | IncrediBots Robot |
| ibt | Texture and Model Data |
| icd | Dungeon Keeper 2 Game Data |
| id | SimCity 4 Channel Identification Data |
| idm | Indigo Prophecy Game Archive |
| ids | Infinity Engine Text Based Lookup Table |
| idx | Hellgate: London Game Archive |
| idx0 | Runescape Cache Index |
| idx1 | Runescape Cache Index |
| idx2 | Runescape Cache Index |
| idx255 | Runescape Cache |
| idx3 | Runescape Cache Index |
| idx4 | Runescape Cache Index |
| iex | The Tuttles Madcap Misadventures Data |
| ifl | Descent 3 Ship Graphic Data |
| ifo | Anno 2070 Configuration |
| ifo | Bioware Information File |
| ifo | ROSE Online Map Data |
