XO Arena
Tic-tac-toe with a ladder of ever-smarter AI rivals!
How to play
Classic tic-tac-toe against the machine — win the best-of series to take each stage. Early rivals blunder freely; the final ones calculate perfectly, so you'll need every fork and trap you know. Your progress is saved automatically, so you can come back and continue from the highest stage you have unlocked.
Controls
- Desktop: Click a square to place your mark.
- Mobile & tablet: Tap a square to place your mark.