TouchArcade writes: "Like its predecessor, Zombie Attack: The Second Wave will place you in the shoes of a zombie invasion survivor. You'll be tasked with protecting a building from the undead horde. What sets the Zombie Attack series apart from other iPhone tower defense games is that your survivor will have to manually place and upgrade the turrets. You can't simply swipe around the screen with a high omnipotent finger placing units willy nilly. You'll need to safely guide your survivor past the oncoming monsters if you want to place that gun turret just right, or upgrade that cannon to maximum ferocity."