Much like Nintendo's Brain Age (NDS), Brain Challenge offers up a daily test of one's cognitive capacity, complete with detailed stat tracking. With a multiplayer mode that supports up to four players, both online and off, the game also features Stress Mode, Creative Mode, and Child Test. Developed by Gameloft, Brain Challenge will sell for 800 Microsoft Points ($10).
PomPom's Bliss Island follows the exploits of Hoshi the Zwooph as he tackles 25 separate challenges during the title's nine levels. If you want to see the mystical blue creature crowned champion of Bliss Island, it'll take a small contribution of 400 Microsoft Points ($5)