Tic Tac Toe : The Original Game is a free classic puzzle game also known as noughts and crosses or sometimes X and O. The Tic Tac Toe game is a game for two players, called X and O, who take turns marking the spaces in a 3×3 grid. The player who succeeded in placing three respective marks in a horizontal, vertical, or diagonal row wins the game. The Tic Tac Toe is a great way to pass your free time whether youre standing in a line or spending time with your kids. Stop wasting paper and save trees. Because of the simplicity of Tic Tac Toe, it is often used as a pedagogical tool for teaching the concepts of good sportsmanship and also for teaching artificial intelligence.