Depending on where you found the file, it usually refers to one of the following:
: In the modding community for The Legend of Heroes: Trails to Azure (Geofront), BG.rar is a specific archive required for installing the English patch. BG.rar
: It often serves as a shorthand name for a collection of custom character portraits (backgrounds) for the Baldur’s Gate series. Depending on where you found the file, it