Sudoku - Free Sudoku Puzzles, Number Puzzle Game "Sudoku - Free Sudoku Puzzles, Number Puzzle Game" is a FREE number puzzle game and single player game. "Sudoku - Free Sudoku Puzzles, Number Puzzle Game" is also a brain game and offline game. You can download Sudoku free app for your android phone and tablet. Classic Sudoku is a logic-based number puzzle game and the goal is to place 1 to 9 digit numbers into each grid cell so that each number can only appear once in each row, each column and