Fifteen

A classic slider puzzle game. I?ll tell you how to play, but I won?t tell you how to win. There are millions of combinations of tiles, but usually you win by getting the tiles into some kind of order (like horizontal, vertical, spiral, diagonal, reverse variants, shift variants, postage stamp, etc.). Just think up some pattern of numbers and try to make it. Who knows? You might get an achievement or two. But BEWARE: some patterns are impossible!