Granted it cannot compete with console giants like Left 4 Dead and the Resident Evil series but I'm constantly amazed and delighted to see new Zombie games appearing in the App store! Sure there are some pretty bad ones but for every bad one there are at least 3-4 great ones! For Zombie connoisseurs I would recommend the following games from the App store:
1.) Zombie Attack! - this was one of the first Zombie games in the App store and falls into the Tower Defense genre with a twist in that you actually control a character and are not limited to a specific path that the attackers follow.
2.) Zombieville USA - This is a straightforward side-scroller Zombie shooter with great cell-shaded/cut-out graphics. The character animations and weapons are excellent!
3.)iZombie Death March - This game is a short episodic top-down shooter that provides nice variation in each level making you feel like you are progressing through and escaping a Zombie outbreak. It is short but the presentation is excellent and is a great addition to the Zombie genre.
4.) Zombiegame - this is a simple 1st person survival game in which you are assaulted by endless waves of Zombies. You are rooted to one spot and can only move your view from side to side and must frantically watch all sides to prevent a Zombie from blindsiding you. It has great watercolor/ink art and dark atmosphere. Another simple but fun game.
5.) Attack from the Dead, or AFD - In this game you must defend a single building from a Zombie onslaught by night and explore buildings for supplies and survivors during the day. The gameplay is simple as you move your character up and down behind a barricade of furniture and shoot the Zombies entering through the door. The daytime exploration is limited to tapping on buildings on a map and could have been better but add a nice touch to the game.
6.) Alive 4-Ever - This is a new game and is one of the best. This is a top-down survival shooter with some variation added to certain levels like rescuing survivors and obtaining vaccines, etc. This game has a level-up system and allows customization of one of the 4 characters (who each have their own unique attributes) through increasing attributes, purchasing new weapons, and unlocking bonus items. It supports multi player and would be a blast to play with others!
7.) Resident Evil 4 & Degeneration - Capcom brought the Resident Evil series to the iPhone in not only one but TWO games! One is a watered down version of RE4 and the other is an original title that goes along with the recent CGI movie RE Degeneration. Both play exactly the same and are decent games utelizing a "virtual analog stick" on the touch screen. This type of game is a little hard to do well on a touch-screen only platform but both are excellent games given the inherent limitations of the iPhone.
...more to come.