Challenge Me: Brain Puzzles has accomplished exactly what it set out to do: it’s a vast compilation of Sudoku and Picture Logic puzzles, with easy gameplay for those who know how these puzzles work.
It can be picked up and played in short bursts that provide the brain with a decent daily workout, but it lacks both the variety and presentation of Brain Training series – two tried and tested games, no matter how deeply explored, will never match Nintendo's franchise.
All in all, for cheap, no-frills fun, this is a worthy title. Just don't expect the challenge to be bigger than Brain Training.