My brother had acquired a pirated copy for me. But the videos and dialogues had been stripped out to save space. He was gushing about how your footsteps would make different sounds on different floor types, but I already knew that from Jedi Knight. So I really didn't get what the fuzz was about.
Don't know how much time later I got a full copy and completely fell in love. It's one of my all time favourite games. The atmosphere is the best. And the different footstep sounds actually serve a gameplay purpose.