Grid3 is a free Puzzle game you can play instantly in your browser, with no download and no registration. How to play: Tic-tac-toe rules. It renders at 800 by 600 pixels and scales to your window. It joined SaGo Games on October 29, 2026. It is an HTML5 build, so it loads in any modern desktop or mobile browser.
This game is a classic tic-tac-toe game with 3x3 grid where players have to play by rules. The one player that completes a straight line first is called winner! Focus and play!