Played on a four by four grid, with four levels. The object is to get four in a row, whether on one level or between all four levels, straight or diagonal. It is essentially a Tic-Tac-Toe game in a 4x4x4 cube.The cube needs to be emptied before start. Each player choose a color of their pieces and take turn to place their pieces in vacant positions, one piece at a time. The player wins who first gets four in a row of his own pieces - either horizontal, vertical or diagonal. It is not allowed to remove or replace pieces that have already been placed. If all positions are occupied without anyone having four in a row, then the game is called a tie.A rule that makes it less advantageous to begin, is to prohibit the first player from placing his first piece in either a corner position or in one of the eight center positions.Similar to: Four Letter Words (though with words) Space Lines (though for 2-3 players) - BoardGameGeek