ACHIVIEMENT SOUNDS?

Because Valve would get hacked and it would get changed to GETALIFE.WAV.

Actually, people would just find it annoying.

Would be messy for achievement heavy games.
Arcen games' A Valley without Wind for example would be a sound fest.

If you actually hunt achievements or trophies on console, the sound that plays quickly becomes one of your favorite things to hear. Tough to understand if you don't give a shit about achievements, I'm sure... but it's fun. Adds another little element to the whole thing.

At least make it optional, off by default. :-)

But there is a sound. Every time you get an achievment, a random quote by Gordon Freeman is played.