Inspired by the popular Brain Age for Nintendo DS, Gameloft S.A. today released Brain Challenge as an iPod Game for the fifth-generation iPod, iPod nano (video) and iPod classic. The $4.99 title includes 20 mini-games designed to provide “brain activity maintenance,” spread throughout Visual, Memory, Logic, Math, and Focus challenges, which can be randomly presented in 15 minute doses of five games for three minutes each.