Star Wars - Jedi Knight - Dark Forces II [LucasArts]
 

Its probably protected though.
But I haven`t seen it being sold anywhere , so its impossible to get.
I have the original CD`s of that one (or was it 1 cd ?) anyway it got ruined so I threw it away. Still have the box though , its at my parrents attic hehehe.

it's by LucasArts.
(for most people that would have been enough, but for those who don't know the problem: LucasArts protects their game with more fierceness than any other company. or so they say...)

Even if it wouldnt be protected,it still would be TOO big(something about 600mb).

Anyway,Jedi Knight is a very interesting game(I think its better than Jedi Knight 2).