are you refering to Wolfenstein 3d? I used to play that game funny thing: My parents thought that it was a bad thing to let me play it, so they deleted it. But my grandparents had it on their pc!
I tried it but I really don't like the Quake 3 engine when it looks like Quake 3. Example: RTCW and W:ET. Good example of Q3 Engine games that don't look like Q3 = Medal of Honor: AA, Call of Duty. Everything is just too big and bulky and unrealistic looking. Enemy Territory is also much too complex to be able to just jump into, even for a hardcore gamer like me. I'll stick with BF1942.
"I joined the Cult of Clops / If I were you, I'd sleep with one eye open."