.GFX File Extension
What is a GFX file?
A GFX file is an animation file used by video games, such as Batman: Arkham Asylum and Mass Effect. It contains vector and raster graphics in a format similar to the .SWF file format. GFX files also may include ActionScript interactive actions.
Before Scaleform was acquired by Autodesk in 2011, they developed Scaleform GFx, which is a graphics rendering engine. Scaleform GFx is used to display video game user interfaces, HUDs (head-up display), and animated textures that are based on Adobe Flash.
NOTE: Autodesk Scaleform has been discontinued.