Challenge Me: Brain Puzzles 2 is a collection of logic puzzles, designed to improve players' performance through quick, casual play sessions over time. Sudoku, Karuro, "Squares," "Number Soup," and other puzzle types are included, with three difficulty settings. A timed mode has players racing to solve as many puzzles as they can, to earn high scores. As in O-Games' original Brain Puzzles for Nintendo DS, results are tracked in statistics and graphs that can chart players' improvement in the featured activities. ~ T.J. Deci, All Game Guide