| acf | X-Plane Aircraft Data |
| acm | Infinity Engine Audio Data |
| acnh | Animal Crossing: New Horizons Saved Game |
| acnl | Animal Crossing: New Leaf Pattern |
| act | Fly! RAW Image Palette Data |
| acww | Animal Crossing Wild World Pattern |
| addr | Metin2 Game ADDR Data |
| ae | Curse: The Eye Of Isis Game Data |
| aei | Abyss Engine Image |
| aem | Abyss Engine Mesh |
| af | Doom 3 Articulated Figures Data |
| afl | X-Plane Data |
| afs | Devil May Cry 3 Data |
| age3rec | Age of Empires III Recording Data |
| 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 |
| aip | ROSE Online AI Data |
| airport | RealFlight Airport Data |
| airports | RealFlight Airport Data |
| ajart | Animal Jam Artwork Data |
| ajgart | Animal Jam Artwork Data |