3-D Tic-Tac-Toe

3-D Tic-Tac-Toe is a puzzle game released by Atari for the Atari 2600 console and in 1980. In the late 2000s it was released with the Atari Flashback 2.

The game is similar to the traditional game of tic-tac-toe, but is played on four 4x4 grids stacked vertically on top of each other; it is basically a computerized version of the board game Qubic (by Parker Brothers) using traditional tic-tac-toe notation and layout.

To win, a player must place four of their symbols on four squares that line up vertically, horizontally, or diagonally, on a single grid, or spaced evenly over all four grids. This creates a total of 76 possible ways to win, in comparison to eight possible ways to win on a standard 3 &times; 3 board. The game has nine variations, it can be played by two players against each other, or one player can play against a built-in AI on one of eight different difficulty settings. The game uses the standard joystick controller.