The levels are really well designed with seamless shifts from indoor to outdoor settings. While the levels themselves are beautiful, it's the character models that deserve the most attention. Each model is animated with a fantastic looking weighted skeletal system. This same system divides the models up into 18 separate damage zones. Each damage zone has specific death and recoil animations to go along with it, so you can see from a distance just where you hit someone.
Enemies when hit, can also fall down staircases or off of balconies.
They can even get stuck to the wall by your harpoons. Since the models are socketed, they can be equipped with all sorts of hats and clipboards and sundry accoutrements. That's right, I said sundry. The facial animations use an algorithm to sync speech with mouth movements in a fairly convincing manner. The enemies are all designed with real senses and will respond to 11 different stimuli.