Classic Sudoku Category:Online Puzzles Games Description: Classic Sudoku is an exciting and entertaining sudoku game where you have to solve number puzzles by filling the empty places of a puzzle with the missing numbers. Every row must contain one of each number. So must every column, as must every 3x3 square. Classic Sudoku contains 3 different difficulty levels and 100 unique puzzles. This game is online. Tags: Developer:level234 Instructions: Check inside the game for instructions on how to play Classic Sudoku.