With doomsday theorists saying we might have a potential zombie attack to fight off during the end of days, it's always best to stay prepared. Shotgun FunFun can help you out with that. This cool game puts you in a scenario where you're trapped in an industrial looking place with 100,000 zombies ready to eat your brains. Oh, and you have unlimited shotgun shells at your disposal so you can blast your way through hordes of the undead. Originally available for download on the PC, the game is now offered absolutely free from the Mac App Store. Now you can tune in and blast your way through a zombie feast. Give the game a download and see how far you can keep Buck Morris alive.