Crystal Dynamics ported many of their original 3DO games to the Saturn and PSX. Gex, Slam n Jam (With Magic and Kareem on the ports), Total Eclipse (PSX Only), The Horde, and a few others I might be missing.
Are there any differences between the 3DO versions, and the Saturn/PSX version? Any boost in resolution? Loading times? Extra content? Not just Crystal Dynamics, but pretty much any 3DO game that was ported to the Saturn or PSX.