The only problem with Zombie games is that the developers seem to think that the addition of a zombie completes they game, and they end development. Last Stand and Box Head are the only good zombie games in my opinion. At least flash wise. There are some good ones for the Xbox. Left 4 Dead being one.
Pure zombies? Like eat your flesh zombies? Not sure. I've played resident evil 4 and 5 and they were awesome, but the "zombies" are made by parasites, and they use weapons, and they can talk, etc. So I wouldn't really consider them zombies.
