Wilhelm scream, anyone?
While most statistics are pulled out of the ass, especially this one, I wouldn't be that surprised if, say, 90% of all the sounds in games and movies are re-used... Since like the 30s.
You know the pig sound from WC2? Yes, it's been every-fucking where with pigs - in movies, other games, and what not. Wilhelm scream... Shots... Generic karate attacks... And so on.