Thanks to Gametrailers and Microsoft, we now have a trailer for the backstory for the upcoming RTS game — Halo Wars for the Xbox 360. The movie is all pre-rendered video with absolutely no gameplay at all. But to be honest, that doesn’t bother us too much — the production of the video is just stunning and it almost makes us want to watch the CG story than actually play the game. Ok, I’m kinda kidding, but it sure does look good.

The trailer follows marines who, while cruising around space — discovered the Covenant is on a icy-planet and looking for something that, “could just be the key to the whole war.” What could it be? We’re not sure…