| arz | Titan Quest Game Data |
| asb | Starpoint Gemini 2 Assembly |
| asg | Airport Tycoon Saved Game |
| ash | Audiosurf Audio Metadata |
| ash | Kingdom of Loathing KoLmafia Script |
| ash | KoLmafia ASH Script |
| asi | Men of War: Assault Squad 2 ASI Data |
| asl | Quest Adventure Game |
| ass | Splinter Cell: Blacklist ASS Data |
| asset | Unity Asset |
| assetgroup | F1 2015 Game Assetgroup Data |
| assets | StuntMANIA Assets Data |
| asstrm | Splinter Cell: Blacklist Data |
| ast | Need for Speed: Underground Audio Data |
| asv | Train Simulator Computed Activity Data |
| at3 | Airport Tycoon 3 Saved Game |
| atc | SimCity 4 Animation Texture Collection |
| atlas | Darkest Dungeon Graphics Data |
| atlas | Stronghold 3 Editor Atlas Data |
| aut | Descent Manager Data |
| avp | SimCity 4 Animation Viewpoints Data |
| awf | Abomination Game Data |
| awp | Akimbot Waypoint Data |
| awreplay | Arena Wars Replay |
| az | Ski Stunt Simulator Animation |
| azp | Close Combat Effects Data |
| b | GTA III Saved Game |
| b!k | Microsoft Flight Simulator Scenery Data |
| b2k | Sensible Soccer 2006 Data |
| b3d | OpenBVE 3D Object Data |
