Pic-Tac-Toe - Version 1.5.1 Pic-Tac-Toe is a cousin to three-dimensional tic-tac-toe, but it's easier to play, better looking and more fun! You can play against a friend or try your hand against the computer at your choice of difficulty levels. You can even sit back and watch the computer compete against itself. Built-in help and rules demo makes learning practically instant! Graphics are configurable.