15-Pack is an award-winning computer version of the classical slider puzzle. 15-Pack is an advanced, fun, and addictive version of the well-known 15 puzzle. The game grid consists of numbered pieces. There is one empty square in the grid, which allows you to switch positions of surrounding tiles. The object of the game is to recreate the original order of randomly shuffled numbered pieces in the least moves and time possible. 15-Pack differs from the original puzzle of 15 in customization ability. It offers 20 various game boards from 3x3 up to 8x8 size (for example, 5x6 board). There are 16 board skins in the game, so you can select exactly how the pieces and background will appear. There is a table of high scores and best times to save your records. Sound effects and lovely background music are also included.