Ultimate Tic-Tac-Toe

Ultimate Tic-Tac-Toe — nine nested boards. Every move you make decides which board your opponent must play next, so a simple game becomes real strategy. Computer opponent included.

A faithful digital board game with a built-in computer opponent, rules help, and a clean single-file build. No account, no ads, no tracking; works offline once loaded.

Buy once for $1 to download the standalone build and support development. Made by a civil engineer who builds games and simulations on the side; more at boardgaminghub.com.