Pentagonal is a 3-D, five-layer game that challenges players with complex strategies, yet is deceptively simple to learn and play. The object of the game is to place five marbles in a row either vertically, horizontally, or diagonally. The challenge of the game is to master the mind-boggling number of combinations and permutations possible with every move. Beginners will have instant fun; accomplished players will be endlessly challenged. The game's collapsible board consists of five layers connected in a flexible stack, which requires nothing to set up or put together. The result is a unique three-dimensional gaming experience that can begin the instant the game's box is opened. Pentagonal can be played individually or in teams. Marbles can be added and rules can be customized to add challenge to the game. Essentially a Tic Tac Toe game in 5 x 5 x 5