Alright, I'm going to say it before any assumptions come up. Yes, I'm a Halo Fanboy. BUT. I'm a Halo Story fanboy. Sure, Multiplayer can stir up some lawl, but I love the storyline.
Now, this, this...is just terrible. Make fun of me all you want, but I know a good Halo storyline. Duel: no, not the whole Japanese culture thing, cool concept, but not Halo. +Gundam sized Hunters just don't work. +1 for the cool art style.
Babysitter: Meh, not bad, but not good. A but cliche. I know of the female SPARTANs, (I mean, come on, Kelly is a badass in FoR.) But the long, flowing hair doesn't work, SPARTAN's were ordered to have stort hair. Nor longer than a stubble.
Origins: Okay, you can figure all this out if you read the Terminals in Halo 3, but whatever.
Prototype: Tie on the best. Story was a BIT blah, but it had a good Halo feel. Good "Humanity's loosing, what now?" Thing.
Homecoming: Other tie, but barely. The darker take was good, and the ending was realy good. but SPARTAN's would never rebel at that stage of training. The whole training prevents that. Any sign of rebellion, and they usually "lose them." But the take was a good concept, that, for the most part, was executed pretty well.
Odd one out: Oh please god....No......If you want to parady it, leave it on the internet. With other parodies. There is nothing I HATE more than loud, screamy, running around anime.
Packege: meh... Good visuals, terrible voice acting.