About Retro Tic-Tac-Toe

Retro Tic-Tac-Toe is a free, browser-based version of the classic 3x3 strategy game, published at tictactoeonline.win. The site also hosts concise reference content on the game’s rules, strategy, history, variants, and vocabulary.

The game runs entirely in the browser — no account, no download, no tracking-heavy ads. Gameplay state (names, scores) stays in your browser’s session storage and your theme preference is saved in local storage. See the Privacy Notice for details.

Editorial policy

Reference content is fact-checked against primary sources where available (e.g., Martin Gardner’s writings on combinatorial games, published analyses of the 765-state tic-tac-toe game tree, and the historical record of A. S. Douglas’s 1952 EDSAC implementation). Pages are dated and updated when corrections are made.