I don't know how old these are but they are freakin' awesome! http://www.youtube.com/watch?v=5uZzRnJ1mn0&fmt=18Game Trailers Link (Higher Quality) http://www.youtube.com/watch?v=8D_L1JY3aZc&fmt=18Game Trailers Link (Higher Quality)
The first one came out sometime last year...and the second came out just a few months ago. Both are incredible. Monty Oum needs to be animating action movies in Hollywood.