What can you say about Tic-Tac-Toe?  Erm... I used to play Noughts and Crosses on the school bus when the windows were fogged-up with child-breath.  By myself.  It got a little repetitive.  I tried it blindfold once, but then I knew I had to kick the habit.

Thankfully this version allows you to play with someone else, if you know such a person.  If you're lacking an opponent, the computer will gladly play you instead, just like in that '80s film WarGames .  But minus the threat of a Russian nuclear war.

Click on a square with the mouse to place your O or X