5. Temple Run

itunes.apple.com
Price: Free

I admittedly don’t play this one anymore, but when it first came out I couldn’t stop playing it! It utilizes the touch, tip and tilt actions of the iPhone so wonderfully that I was basically in awe of this game. I haven’t tried the second one yet, but I hear there are a lot of improvements. If you play it, let me know what you think!