Play a classic game of Tic-Tac-Toe (also called Noughts and Crosses) for free online. The object of Tic Tac Toe is to get three in a row. Play a tic tac toe game against the computer. You and the computer take turns to mark a 3 x 3 grid with your own mark, if 3 consecutive marks are formed, the game is won. Play a total of 20 games to determine your final score.