| age3sav | Age of Empires III Saved Game Data |
| age3scn | Age of Empires III Scenario Data |
| age3xrec | Age of Empires III: The WarChiefs Recording Data |
| age3xsav | Age of Empires III: The WarChiefs Saved Game |
| age3xscn | Age of Empires III: The WarChiefs Scenario Data |
| age3yrec | Age of Empires III: The Asian Dynasties Recording Data |
| age3ysav | Age of Empires III: The Asian Dynasties Saved Game |
| age3yscn | Age of Empires III: The Asian Dynasties Scenario Data |
| agg | Heroes of Might and Magic Game Data |
| agx | AGT Game File |
| ahc | Resident Evil 4 Game Data |
| ahf | Aces Hight Film |
| ahod | Homeworld Game Data |
| ai | AI Game Data |
| ai0 | AI Game Data |
| ai2 | AI Game Data |
| airport | RealFlight Airport Data |
| airports | RealFlight Airport Data |
| alo | Star Wars: Empire at War Game Model |
| am1 | Adventure Maker Package |
| ama | FIFA 2000 Game Data |
| amx | AMX Mod Plugin |
| an2 | Croc Animation |
| ancs | Metroid Prime Animation Data |
| animated | OpenBVE Animated Object |
| anz | KISS CM3D Model |
| apc | Cryo APC Audio |
| ar | Midtown Madness 2 Game Data |
| arch00 | F.E.A.R. Game Archive |
| arch01 | F.E.A.R. Game Archive |
