To pick a specific song would be difficult in some areas, but it wouldn’t be hard to pin down genres for each.
I would split the humans into four main factions:
- Spartans - ODST - Marines - Other UNSC Personnel (Cpt. Keys, Halsey, etc.)Spartans are hard because you can see a good example of how distinguished and unique they can be from one another. Picking one song, or even genre would be difficult to fit each of the Spartans, but overall I think something like hard rock would fit well. Disturbed - Indestructible, or a generic answer as Breaking Benjy would work (the line “only the strongest will survive” comes to mind from blow me away).
ODST seem like tougher marines, people who look badyoink to others and think they’re real tough stuff. Probably something most would find over the top like Five Finger Death Punch.
Marines seem simple. All Ooh-Rah! Butt- kicking covvykillers. Likely very close to their real life counterparts I would imagine they listen to Metallica, AC/DC, and other hard rock.
Other UNSC would probably do best with light background music, like a HALO menu theme or something akin to elevator music. Heck, throw the Mii channel music in there.
Covenant have always been metalheads in my mind. I’m not sure, maybe it’s that death metal seems inherently alien, or that the first death metal band I heard was “Rings of Saturn” which is ALL about aliens. But I’d break up the covenant like this:
- Elites - Brutes, Skirmishers, and Jackals - Grunts - Prophets - Engineers and Drones - HuntersElites would have something sophisticated, complex, with bits of soft or orchestral parts, but also plenty of speed and violence. Born of Osiris as a band i think would be a perfect fit. And I cant leave out the HALO fans themselves, the death metal band known as “Shadow of Intent”!
Brutes, Skirmishers, and Jackals are all more animalistic. Violent music like Spite, Slaughter to Prevail, or creepy music like mentioned before - KoЯn would fit them well.
Benny Hill music as a theme for grunts is too perfect, no need for explanation.
Prophets are crusty old cracks. They probably enjoy choir music or something of the like.
Engineers and Drones strike me as more of a nature-themed music type. Maybe something even slightly tribal for the drones, maybe some piano for the Engineers.
Hunters need boss music. Think of some of your favorite video game boss battle tracks and put that to hunters. The intimidation and rarity of a hunter fight merits boss music in my opinion.
The flood would all go under one category, seeing as they are all controlled by one gravemind. Given that gravemind says that he’s listened through “rock and metal and time” I’m assuming he’s talking about music (not really), but what better band to listen to than the Australian metal band “Gravemind”? Some songs are even about torment, living a different life than your own, and masses of violence.
Lastly, Forerunners. They all seem like the all too easy answer of techno. They even look like something out of Tron! Maybe even to the point of dubstep, if that’s your thing.
Sorry for the mini-book, this is a topic which I’ve dwelt on over many sleepless nights.