3D model file created with FaceFX, a program used for constructing facial animations from audio data; stores 3D facial bone coordinates, face graph nodes and links, and animation keys; used in video games for animating the facial expressions of virtual characters.

When you have completed an actor design, you can publish it to a .FACEFX_INGAME file, which strips non-essential information from the FACEFX file. This allows the files to be lightweight so that FaceFX consumes fewer resources when executing animations in the game. The FaceFX technology is used for well-known games such as: Starcraft 2: Wings of Liberty Mass Effects 2 Assassin's Creed 2 Halo 3 Fallout 3 Gears of War 2 Unreal Tournament 3 Guitar Hero 2