3-D Tic Tac Toe (The Alternate Source)

The game is similar to the traditional game of tic-tac-toe, but is played on four 4×4 grids arranged vertically. In order to win, a player must place four of their symbols on four fields vertically, horizontally or diagonally, either on one grid or evenly spaced across all four grids. This gives a total of 76 possible ways to win.