| .acf |
Steam Application Cache File |
| .arp |
Advanced RAR Password Recovery Setup |
| .ars |
After Effects Render Settings File |
| .age3xsav |
Age of Empires 3: The WarChiefs Save File |
| .age3ysav |
Age of Empires 3: The Asian Dynasties Save File |
| .age3rec |
Age of Empires 3 Recording |
| .age3xrec |
Age of Empires 3: The WarChiefs Recording |
| .age3yrec |
Age of Empires 3: The Asian Dynasties Recording |
| .acww |
Animal Crossing Wild World Pattern File |
| .acx |
Atari ST Program |
| .arena |
Quake 3 Engine Arena File |
| .a52 |
Atari 5200 ROM |
| .asset |
Unity Asset File |
| .a26 |
Atari 2600 ROM |
| .ash |
Nintendo Wii System Menu File |
| .abs |
Absolute Database File |
| .asstrm |
Splinter Cell Blacklist Game Data File |
| .agx |
AGT Game File |
| .assets |
Unity Asset File |
| .a78 |
Atari 7800 ROM |
| .aiv |
AIVault Data File |
| .an2 |
Croc Legend of the Gobbos Animation File |
| .alr |
ADRIFT Language Resource File |
| .agb |
Game Boy Advance ROM |