Well, I went back and played the entire way through in one sitting and I must say how are you going to play that game without a mouse and keyboard?
The masses of ememies which some grow to some infinte bocy count would require the players to pick of targets at near extream ranges with quick target changes. Throw in the need to change wapons quickly it is going to be hell to play.
Damn good gam, but without a mouse and keyboard or some heavy game play tweaks, deadmeat.