By default, all software supports multiple file extensions. Need For Speed Underground supports at least 2 different file extensions. The basic files that Need For Speed Underground supports are .UGD. However, not all of the extensions listed on the list are always used to save the effects of work in Need For Speed Underground. Very often, files with such extensions are used as source data files used by Need For Speed Underground.
Need For Speed Underground 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 Need For Speed Underground and try to save it in another file format, also supported by Need For Speed Underground.