Strategic Tic Tac Toe is the most popular online version of Tic-Tac-Toe, the legendary two-player board game and it is now available to play for free at Cool Math Games! There are 2 game modes: Single- and Two-player mode. You will play against the computer in the single player mode. In the two player mode, you will have a chance to challenge your friend! The game board consists of 9 ordinary tic-tac-toe boards. Use your mouse for drawing X’s on each square of the Tic Tac Toe board. Click any green cell to place the cross on it. Each move is defined by the position of the opponents move. If the destination board you have been sent into has already been won, you can pick another board instead. Win on three boards in a line to win the game. Good luck!