http://mocap.cs.cmu.edu/Not a lot of combat-esque animations, but tons of normal stuff like walks, runs, jumps, sitting, gestures and the like. I dunno if it would actually be able to work on the game models, but it seems they have all the stuff in Cal3D format (.c3d, right?). And it\'s all 100% free to use, if you could implement it.
