Bruce! I think the time you spent on this one paid off buddy! I'm not familiar with Halo4, but this is really cool. I'm only listening on a laptop right now, but it sounds like it is well mixed, arranged, and produced best I can tell.
I like the chordal modulation at 1:20...
I wish I knew how to arrange strings like that!
Are the voices saying something in particular? I couldn't make it out on my laptop speakers.
I think I'll have to have a second listen when I get back in my studio tomorrow.
Good job!