🎮 Play 3-D Tic-Tac-Toe Online (DOS)

3-D Tic-Tac-Toe is a DOS puzzle game published by Atari in 1980. It expands the traditional pencil-and-paper game into a complex challenge by requiring players to think vertically across multiple stacked grids.

How to play

The objective is to be the first to place four of your markers in a straight line. A winning row can run horizontally, vertically, or diagonally on a single grid, or stretch directly across all four layers of the 3D board. Use the Arrow keys to navigate the cursor and press Enter or Space to place your piece.

Tips

The eight squares that make up the central core of the board are the most valuable positions, as they intersect with the highest number of potential winning lines. Focus on claiming these early to set up forks—situations where you threaten two winning rows simultaneously, making it impossible for your opponent to block both.