More like othello than tic-tac-toe You have to play the game a few times to figure it out. You go around the board changing a brick from red -> yellow -> green. 3 greens, and that player wins. Anybody can hit a brick to change it. Color change stops at green. The game had around an hour of entertainment for me. You might like it more if you like Othello or Go. The app is free with no timers, permissions, social hooks, begging for reviews, and other nonsense. That gets it a bonus star.