Challenge your mind, and resolve, with the Rubik’s 4×4 Cube. Skills that you may have gained mastering the 3×3 Cube now require a completely new set of skills to solve the next level, 4 X 4! Are you up to the challenge? Since the original release of the Rubik’s Cube in the mid-1970s, combined, more than 250 million Rubik’s Cubes have been sold worldwide. With thousands of combinations but only one real answer, this game will test even the toughest puzzle enthusiast!