Play the free Sudoku game online at Run3-game.com! Sudoku is an addictive game. This game has 4 modes: Easy, Medium, Hard, Very Hard. Players choose one mode to play. Your task is to fill the 9x9 grid so that each row, each column, and each of the nine 3x3 boxes contains the digits 1 to 9. You can like the Fairway Solitaire and Tetris game. Play now!