The Steam Music Player has come out of beta and launched for everyone. The feature adds a music player to the Steam standalone client that can play MP3 files on your PC. The new system also collects all those video game soundtracks you’ve gotten for purchasing games on Steam and puts them into one easy to use library. The player works with the in-game Steam overlay, so you can listen to your music while playing games. Beethoven with Team Fortress 2? Sure! The Clash with Dota 2? Go for it! Iggy Izalea with Portal 2? Well, there’s no accounting for taste.
Valve has even helpfully created a list of games with soundtrack offerings to get gamers started on their collections.