By default, all software supports multiple file extensions. Doom 3: Resurrection of Evil supports at least 1 different file extensions. The basic files that Doom 3: Resurrection of Evil supports are .PK4. However, not all of the extensions listed on the list are always used to save the effects of work in Doom 3: Resurrection of Evil. Very often, files with such extensions are used as source data files used by Doom 3: Resurrection of Evil.
Doom 3: Resurrection of Evil 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 Doom 3: Resurrection of Evil and try to save it in another file format, also supported by Doom 3: Resurrection of Evil.