This is a ‘X' & ‘O' Game which allows you to play ‘X' and ‘O' with Computer. Wondering what if i am alone! Well you can play it with computer as well. Save paper! Play 'X' & 'O' on your cellphones! Rules: 1. The X player usually goes first. 2. The player who succeeds in placing three respective marks in a horizontal, vertical, or diagonal row wins the game.