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