By default, all software supports multiple file extensions. Call of Duty supports at least 8 different file extensions. The basic files that Call of Duty supports are .PK3. However, not all of the extensions listed on the list are always used to save the effects of work in Call of Duty. Very often, files with such extensions are used as source data files used by Call of Duty.
Call of Duty 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 Call of Duty and try to save it in another file format, also supported by Call of Duty.