Some of my favorite all time iOS games - made by Cat in a Box Games - have been updated for iOS 7, the iPhone 5 screen size, and Retina displays. Years after release, these games have remained some of my favorites. If you've never played them it's a great time to pick them up and give them a spin now that they are all updated for the latest hardware.
Blue Defense was the first game released. It used the accelerometer in an interesting way; having the player rotate their phone 360 degrees to defend the blue planet in the center.
Blue Attack has the other end of the story with the blue side attacking the red invaders in their home land. Different control methods and unique game play.
Blue Defense: Second Wave! amps up the original title with new attacks and new fun. It's a great place to start if you've never played any of the three.
Fastar! is a completely different game, a lightweight RPG and a ton of fun. [Editor's Note: Yes! Fastar!]
Red Conquest is a new take on the Red/Blue storyline and is full blown real time strategy game. Deep and fun.
All great games and all worth supporting. It's always nice to see a developer keep games like this alive by updating for the latest hardware and iOS versions.