Play Dora Tic Tac Toe online game! Play Dora Tic Tac Toe online for free! Dora Tic Tac Toe is a puzzle strategy game. Choose the circle or X mark to start the game. Your opponent is the computer in the game. You draw X and the computer draws O by turns to make the spaces in a 3x3 grid. If you succeed in placing three of their marks in a horizontal, vertical, or diagonal row, you win the game. Good luck. Play Free Online Version in your browser.