The game is very similar to tic tac toe but played on four grids that are stacked in a vertical manner. To win, the player must line up four of their symbols horizontally, vertically, or diagonally in a single 4x4 grid, or equally spaced across all four grids. It creates 76 different ways to be a winner, compared to only eight on a normal 3x3 board. You can choose to play it with two other players or against the built-in AI.