Deus Ex is based on the same engine as UT, right? So you could probably start by copying stuff from Marathon: Resurrection. Probably not the complete set of Lh'owon ambient sounds, though.
: A friend of mine is working on making some Marathon 2: Durandal levels with
: the Deus Ex engine, and is wondering if it's possible to download the
: ambient sounds in .wav or some similar format. Considering you can
: download textures from The Marathon Trilogy I'd imagine there wouldn't be
: any legal issues with it. If not, is there a converter to export them in
: the "Sounds" file and make them .wav files from there?