.FACEFX_INGAME File Extension

File used by FaceFX, an application used to create facial animations for video games; stores the stripped down version of the .FACEFX model that is suitable for use in the target video game; designed to store only the information required by the actor; used as the publishing format for virtual characters.

FACEFX_INGAME files are used by the FaceFX SDK, a software that allows game engines to load and play FaceFX files within their respective games.