Rage HD

Rage HD is definitely not an app for children, but it is, hands down, the best looking app on the iPad (and iPhone -- as a separate version of the same game is also available for other Apple iDevices). Id's graphics engine was built for the current generation of consoles, and the fact it transitions so smoothly to Apple's products is a technological achievement. The game itself is a standard "on rails" shooter -- where the player only has to worry about aiming, not walking. That prevents you from exploring, which is a bit frustrating, but you're so busy trying to stay alive that the point quickly becomes moot. While extraordinarily violent, the game also shows a sense of humor, with the Mutant Bash TV host interjecting comments from time to time. It's not something you want your children to play, but adults who enjoy action games will likely have fun.