HotPaw XOCubed, a 3D 4x4x4 Tic Tac Toe Game Play Tic-Tac-Toe, not for 3-in-a-row, but for 4-in-a-row inside a 3-dimensional playing field. Play against the computer, or a friend. There are 76 different ways to win in 3 dimensions, including 28 possible diagonals. Can you find all the ways to get 4 in a row and beat your opponent? XOCubed includes options for choosing one-player or two-player mode, playing first or second in one-player mode, and selecting one of 10 different difficulty levels. Enjoy.