Finally opened up my copy of this. I started a playthrough on Hard, but the zombies take so many hits.... Is there any worthwhile reason to play on Hard other than the challenge?
My advice woulld be to start on normal to unlock all the Combos and better stats. They make the game waaaaay easiier.
then play again on hard (or very hard) to complete the whole collectathon (lolliwrapper and named zombies)