Plants vs. Zombies
Well, the promo of this game was great. A kooky little song sung by a sunflower about zombies eating your brains - how could you not be tempted to try it! Not one for Zombie type games/movies/fashions I was pleasantly surprised that the game has a great sense of humor and provides limitless gameplay.
Hint: Type 'future' whilst you are playing to transform your zombies...