All I can remember it was not "Childish" Animation (Relatively) but more realistic style, resembling to videos in command & conquer red alert (I know that in c&c there's real actors playing.. but that is the only example I have to Demonstrate you what I mean when I say "realistic animation")
kind of like this:
http://www.youtube.com/watch?v=bpvqn0fT1OY