Gameloft today announced that Brain Challenge, a game designed to stimulate and enhance brain activity, is now available on the iTunes Store for players to purchase and download on the fifth generation iPod, iPod classic and new iPod nano with video. The title features 20 different games designed to train certain areas of brain activity based on five categories of exercises: Memory, Visual, Logic, Math and Focus. At the end of each test, players receive marks based on accuracy and speed Brain Challenge is available now for US$4.99.