Sliding Puzzle is a classic tile-sliding brain game where you rearrange numbered gemstone tiles into the correct order by sliding them one at a time into an empty space. Built on the legendary 15-puzzle formula, this free online version runs instantly in your browser with zero downloads required. Choose your grid size and start shifting tiles until every piece locks into place.

The game offers three difficulty levels – a forgiving 3x3 grid for beginners, the traditional 4x4 challenge, and a punishing 5x5 grid that will test even experienced puzzle solvers. The dark UI keeps things clean and focused, while procedurally generated gemstone tile colors make each session feel fresh. Real-time audio feedback gives every slide a satisfying click. If you get completely stuck, the Watch & Solve AI assistant steps in and walks through the solution automatically – a great way to learn new solving strategies and spot efficient move sequences you might have missed.

This game is perfect for fans of number puzzles, logic games, and classic brain teasers who want a polished, modern take on a timeless format. Whether you're searching for free sliding puzzle games online, 15-puzzle games no download, or tile puzzle games for mobile and desktop, this covers all of it. The responsive design works smoothly on phones, tablets, and computers, so you can pick it up anywhere and squeeze in a quick solve during a break.