Most games end in a draw ... so it's often considered very embarrassing if you lose. What is TicTacToe? Also known as noughts and crosses, this is a game for two. Players take turns putting their own marks (either a O or a X) onto a 3x3 grid. The first person who gets 3 of his own marks in a row (straight or diagonally) wins! How To Play Objective: Form a straight line with 3 of your marks (O or X). Diagonal counts as well. Controls: Click on the shaded grey square to put down your mark.