Free Online Tic-tac-toe : Tic-tac-toe Game
The great classic: tic-tac-toe, play against a computer, and see if you can outsmart it.
If you want to play the game Free Online Tic-tac-toe : Tic-tac-toe Game in full screen :
On computer: right click then "enter fullscreen".
On phone : long press on the game screen then press "enter fullscreen".
To exit, same protocol.