Looks good, but I can't help thinking that movie-makers,when working with Video Games, need to think more about the story behind the game than making everything looks like it's from the game.
I'm not a big fan of Halo, being a PC owner, but I do know it has much more of a story than simply 'Master Chief', whilst he can't help but be the main character, the very name 'Halo' is about the nature of the planet the first game took place on, it's about the Covenant War and The Flood, Master Chief is just the character it focuses on in many ways, the only reason he's super-powerful is because, from a design point of view, it would make the game unplayable if he wasn't.
Things like Doom, for example, would have been a lot better if the film had forgotten completely that it was a Video Game first, what destroyed it was its 'Video-gameness'.