Very Good. But...
I understand, this is funny, you can say whatever you want, but you goofed big time on Master Chief's origins. The truth is, he was taken by the military and trained to be a SPARTAN super-soldier. And he doesn't have red hair. But this was still a good movie and an interesting plot. The end...? Bleargh. That ending scene was as awkward as the love story in Star Wars Episode 2, and the movie would have done much better without it, or you could have used this, much funnier scene:
Master Chief: Blah, blah, blah, I am your father, blah, blah, homerun.
Kids: You expect us to really believe that?
MC: Nah, I was just messing with you.
That dialogue would have been much more funnier and lots less awkward than the original ending. I suppose millions of people have already told you that it's ARBITER not ORBITER and you still haven't listened to them.
Apart from all that, this was great!