I love the way Bungie has made the music such a massive part of the game, it's just another reason why the games they make are so special. I love the subliminal easter eggs they have in some soundtracks, most famously, Mausoleum Suite. Check it out if you haven't heard it, I believe it points to Didact and Requiem in some bits. I have many favourites so it's very difficult to choose just one that stands out from the others. [url=http://www.youtube.com/watch?v=DNWaJU8nNno&feature=related]Finish the fight[/url] has always been epic. [url=http://www.youtube.com/watch?v=bSIV7CjH4cU&feature=related]Covenant Dance[/url] has always had a special place in my heart since Halo CE was the first Xbox original game I ever bought. Reminds of the chaos that is the Two Betrayals, Elites and Flood bodies everywhere. [url=http://www.youtube.com/watch?v=jZrhQ-Rtwj4]Black Tower[/url] is another great one from Halo 3. This one is also supposed to contain a subliminal message. I love the way this track starts with those drums, its perfectly Halo. Sorry if I've just concentrated on Halo. I'm sure there are many other great tracks from all their great games.