Repackers split large games into "required" and "optional" bins.
: This specific file usually contains "useless" videos, which may include redundant credits, developer logos, or background loops for menus that the repacker deems non-critical for the game to function. fg-optional-useless-videos.bin
The naming convention itself became a minor meme within the gaming community. Repackers split large games into "required" and "optional"