Nested Tic Tac Toe is a simple variant of Tic-Tac-Toe, that adds much more strategy and depth to the game. Take turns placing noughts/crosses like the original game. Win three Tic-Tac-Toe games in a line to win the game. The position of your move determines in which Tic-Tac-Toe game your opponent must play. Local multiplayer. Challenging AI. Watch AI fight for your amusement.