To win the game you need to re-arrange the numbers from 1 to 15 and leave the last tile empty.
Also called Gem Puzzle, Boss Puzzle, Game of Fifteen, Mystic Square and many others is a sliding puzzle that consists of a frame of numbered square tiles in random order with one tile missing.
15 Puzzle is one of many Educational Games to play online on your web browser for free at KBH Games. 15 Puzzle is also a cross-platform game that be played on a mobile phone, tablet, and computer. Tagged as Casual Games, Educational Games, Logic Games, Puzzle Games, and Sliding Games. Upvoted by 9 players. Other games you might like are SLOC: Minimalist Color Puzzle and Puzzle De Pon. No download or installation needed to play this free game. Hope this game brings a little joy into your daily life.