Gosh there are so many great tracks…but I would have to go with Brothers in Arms from CE.
One Final Effort from Halo 3
The one by Beyoncé
Halo 2 Mjolnir Mix
The Odyssey on the Halo 2 soundtrack.
Halo 2s - Blow me away
Can’t remember the track at the end of halo ce when you are drive to the saber to escape the flood and pillar of Autumn… Brings back many good and funny memories
One Final Effort from Halo 3 OST.
That’s tough! I guess if I had to choose, I’d pick “Halo Theme Mjolnir Mix” from the original Halo 2 soundtrack.
I think for me Incubus’ Follow (1st Movement Of The Odyssey) has always been my most favored song from all the soundtracks. Took me a few years to discover that there was a version of the song with lyrics. Other notables would include its counterpart on the Halo 2 Anniversary Soundtrack, Green and Blue (including one of the remixes that were included) and I think Solace as well
The Last Spartan from Halo 2 is freaking mythical, and Finale from the Halo 3: ODST soundtrack is absolutely incredible.
But, honestly, my favorites tend to change quite often (Halo 2, Halo 3: ODST, and Halo 4 are probably my top 3 soundtracks, though).
Halo 2 Theme music FTW
Halo 3 Warthog Run
Revival-Halo 4 so great
EDIT:Halo 4 menu music.Love it
Can’t pick a favorite. I’m tied between
Mjolnir mix
Blow me away
Under cover of night
One final effort
And rock Anthem or saving the world.