.AMX File Extension
File Type 1AMX Mod Plugin File
What is an AMX file?
Custom plugin written for AMX Mod, a metamod plugin for Valve Half-Life and related games; adds additional features and functionality to the game.
AMX Mod X plugins use the .AMXX file extension.
File Type 2Adobe Motion Exchange File
.AMX File Association 2
Video or animation saved in Adobe's Motion Exchange format; developed as a standard format for exporting video projects (such as After Effects .AEP files) to other programs.
The AMX format was also supported by LiveMotion, which was discontinued by Adobe in November, 2003.