Angry Birds ($0.99) - The trial-and-error trajectory plotting of Scorched Earth meets realistic physics in Angry Birds. Players sling a variety of (appropriately enough) angry birds into castles fortifying the pigs that have stolen their eggs. Loopy backstory aside, an increasing number of bizarre birds (like ones that split apart into three or hammer their way through hard obstacles) and ingenious structures keep the action fresh and more difficult than you would expect.
