About this game
Grid3 is a puzzle game built around the classic tic-tac-toe format on a 3x3 board. Two players take turns placing their marks, and the first one to line up three in a row, column, or diagonal wins. The rules are simple to pick up, but every move matters because a single oversight can hand your opponent the win.
The game runs straight in your browser, so there is nothing to download or install. It is free to play, and the minimal layout keeps your attention on the board instead of menus or distractions. Sessions can be as short or as long as you like, which makes it easy to fit into a quick break.
Grid3 works well as a warm-up for your concentration or as a light challenge for anyone who enjoys thinking a few moves ahead. Try different openings, watch how your opponent responds, and see how many rounds you can win in a row.
How to play
Click an empty cell to place your mark, taking turns with your opponent. The first player to get three marks in a straight line, horizontally, vertically, or diagonally, wins the round. On mobile, simply tap the cell you want.