Tac your Tic Tac Toe game to another level. Pass the time on a road trip, flight, or whenever you have time for a challenge with friends and colleagues. 3D Tic Tac Toe is a challenging game that you'll be sure to love! The rules are simple, mastering the strategy of winning is a challenge! This game is for 2 players. One player is X and the other is O Each player takes turns placing their X or O on the grid until someone gets 4 in a row - horizontally, diagonally or vertically. Winning lines can stretch across all four grids as long as they make a straight line from corner to corner. 50 Pages of puzzles (100 playing grids) 6x9 convenient travel size