By default, all software supports multiple file extensions. Left 4 Dead supports at least 4 different file extensions. The basic files that Left 4 Dead supports are .CACHE. However, not all of the extensions listed on the list are always used to save the effects of work in Left 4 Dead. Very often, files with such extensions are used as source data files used by Left 4 Dead.
Left 4 Dead 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 Left 4 Dead and try to save it in another file format, also supported by Left 4 Dead.