DO NOT, I Repeat, DO NOT Put in the Wilhelm Scream! I would Loose ALL respect for you and your game. Every time I hear that scream, I want to Punch/Shoot the Director/s who told the sound guy to put it in the movie/s. Also the Game Developer who use it in their video games. Forgive me but that sh## Needs to Stop!
I see NO reason/situation for it to be use into PC.
I Did Hear it in RCTW as a Random Sound FX and thought "what Why?"