Dark Forces
Jedi Knight: Dark Forces II
Mysteries of the Sith
Also, I've been keeping tabs on the various mods to upgrade DF and JK:DF2 to more sophisticated engines (usually a later Jedi Knight engine), but they're suffering the same fate as most mods like this: developers leave the project, things stall, that sort of thing. Shame, too, as I'd really like to play DF again. :(