Just before HALO 6 comes out they need to release THE ULTIMATE HALO SOUNDTRACK COLLECTION: THE CAMPAIGN EDITION the ones that you hear in the game. As it should be a Full Score with the tracks should be in chronological order from start to finish only from the Campaign.
'THE SERIES
HALO 1: COMBAT EVOLVED (2001)
HALO 2 (2004)
HALO 3 (2007)
HALO 4 (2012)
HALO 5: GUARDIANS (2015)
HALO WARS 1 (2009)
HALO WARS 2 (2017)
HALO 3: ODST (2009)
HALO: REACH (2010)
HALO: SPARTAN ASSAULT (2013)
HALO: SPARTAN STRIKE (2015)