Tic Tac Toe Multiplayer: X O Puzzle Board Game

Open Tic Tac Toe Multiplayer: X O Puzzle Board Game and you are playing — a Puzzle game that runs on the page rather than beside it. It is built for touch, so a phone or a tablet is the natural place for it. Listed under .io, .io games, 2 player, 2 player games, 2d.

It is drawn for a tall screen, so it fills a phone held upright rather than a wide monitor. Everything runs client-side, so there is nothing to set up before you start.