| 3dn | Carnivores: Dinosaur Hunter 3D Model |
| 3do | Total Annihilation 3D Object |
| 3doku | 3Doku Game |
| 3gm | 3D GameMaker Data |
| 4w | Four Winds Mah Jong Saved Game |
| 555 | Black and White Weather Settings File |
| 8ld | Overlord 2 Language Data |
| 9kp | Doom Archived TGA Image |
| a | Hellhog XP Game Archive |
| a3r | Alan v3 Resource File |
| a5op7 | Axeso5 Operation7 Game Data |
| a60 | Roland Garros Tennis MVTS Data |
| a7s | Anno 1800 Game Data |
| aas | Star Trek: Voyager - Elite Force Bot Support Data |
| abg | FIFA 2000 Game Data |
| abk | Need for Speed: Underground Audio Bank Data |
| abl | Anno 2070 Scenario Data |
| abm | Anno 2070 Texture Data |
| abo | Anno 2070 Scenario Data |
| abz | AbszOrb 3D Interactive Game Data |
| abz | Alpha Black Zero Game Data |
| acd | Alan IF Adventure Code |
| acd | NASCAR Racing 2002 Arcade Car Setup |
| ace | Train Simulator Texture Data |
| acf | X-Plane Aircraft Data |
| acm | Infinity Engine Audio Data |
| acnh | Animal Crossing: New Horizons Saved Game |
| acnl | Animal Crossing: New Leaf Pattern |
| acs | Hexen ACS Script |
| act | Fly! RAW Image Palette Data |
