- Challenge your friends or the computer - Choose your theme, names, icons and colours - Play offline in over 15 languages Tic-tac-toe, also known as Noughts and Crosses, 3 in a row, or Xs and Os is the classic pen and paper game for two players. One player is usually X and the other O. The players take turns marking the spaces in a 3x3 grid, the player who succeeds in placing three of their marks in a horizontal, vertical, or diagonal row is the winner. Now you can ditch the pen and paper and