3-D Tic-Tac-Toe is an adaptation of the board game of the same name for the Atari 2600. It plays just like Tic-Tac-Toe, but on a 4x4x4 cubic space. Whoever can get a row of four in any dimension wins the game.

In this run, Walgrey plays against the computer at the hardest difficulty and beats it as fast as possible while minimizing the time the computer thinks between moves.

There are alternate encodes that remove all the fades-to-black to make it easier to follow the run.