Ultimate Challenge: Sudoku

-6 different difficulty levels.
-Custom Colors.
-Facebook Integration.
-HD Support (device dependant).

Ultimate Challenge: Sudoku will ONLY USE YOUR DEVICE'S INTERNET CONNECTION WHILE USING FACEBOOK. This feature is not active as default, so you can enjoy Sudokus with no ads and no additional fees.

Try it if you have purchased any of the following apps: Angry Birds, Slice It, Tetris, Spaghetti and Marshmallows, Doodle Jump, Farm Frenzy, FarmVille, Super Sudoku, Sudoku Free, AndSudoku, Checkers Free, Go Free, Enjoy Sudoku, Shoot U, Papa Stacker, Space Physics, Jewels, Paper Toss, Robo Defense, Tower Defense, Robo Defence, Tower Defence, Fruit Ninja, Tank Hero, Talking Tom Cat, Tiki Towers, Super Tumble, X Construction, Warcraft, StarCraft, poker, tilt, youtube, google, War, Brain, Puzzle, Beta, Lite, Free, Grave, Solitaire, Chess.

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