By default, all software supports multiple file extensions. Half-Life 2 supports at least 4 different file extensions. The basic files that Half-Life 2 supports are .SAV. However, not all of the extensions listed on the list are always used to save the effects of work in Half-Life 2. Very often, files with such extensions are used as source data files used by Half-Life 2.
Half-Life 2 can be used to convert file formats between the file extensions listed below. You can open a file with one of the file extensions below via Half-Life 2 and try to save it in another file format, also supported by Half-Life 2.