What about adding alternatives for game over, like turning into zombie (by a controller, or blowout?) or some other mutants. It would essentially be game over, because you couldn't take your tasks a a bloodsucker, but you'd have a freeplay mode. The hands could be problem, but it could be solvable by making a first person view by moving the third person camera to the character's point of view (something like this: http://www.youtube.com/watch?v=JiSKdiW8-RA).
This might as well be stupid, and you don't have time for stuff like this, maybe I just secretely want to be a bloodsucker, or a controller.