Downloaded this from the Playstation store last night for $10. And you know what, I like it quite a lot. It's good, campy, zombie-shooting fun. There's a pile of PSN trophies to earn in it too. It's supposed to support multiplayer, and the option IS THERE in the main interface, but it's grayed-out for me.. Not currently available? Offline multiplayer only? *shrug* No clue.