Tic Tac Toe Free description

Tic-tac-toe (also known as Noughts and crosses or Xs and Os) is a paper-and-pencil game for two players,
X and O, who take turns marking the spaces in a 3×3 grid.

The player who succeeds in placing three of their marks in a horizontal, vertical, or diagonal row wins the game.

Game Features:
* 3 by 3 grid
* One player (play against Computer)
* Two difficulty level (easy / hard)