Zendoku

"If you are looking for a decent budget puzzle title, Zendoku may be a decent option for you. It doesn't have snazzy visuals or online play, but it boasts a good number of game options and changes the formula of sudoku enough to warrant attention. The DS touch-screen works perfectly for a game like this (I couldn't imagine messing around with something like this on PSP). Casual gamers be on the lookout for this one."