Hey, I got Halo on the brain too.
Halo 4 - 117. Not a fan of the rest of the soundtrack, but this one is solid.
English
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Like so much of the Campaign, however, 4 was largely better than 5. There's only a few bits of the 5 OST I remember... Setting foot on Genesis, fighting up to Cortana and hearing the theme, and some of the more mournful parts of the Battle of Sunaion (which also add to the aridity of Swords of Sanghelios).