Slide 15 — 15 Puzzle Sliding Game Online
- Plays on
- Desktop · Phone · Tablet
- Price
- Free · no download · no sign-up
Slide 15 is the classic sliding number puzzle: put the tiles back in order, 1, 2, 3 and on, with the gap in the last corner. Start on the little 3×3 board, move up to the real 15 puzzle and then 5×5 — and try to match par, the shortest solution.
Slide 15 is the classic sliding puzzle — the 15 puzzle, also called the Game of Fifteen, Gem Puzzle or Mystic Square. Put the numbered tiles back in order, 1, 2, 3 and on, with the gap in the last corner. Start on the little 3×3 board (the 8 puzzle), move up to the real 4×4 15 puzzle and then 5×5, and try to match par.
Tap a tile next to the gap to slide it in, or tap further along the gap's row or column and the whole line slides at once. You can also swipe toward the gap or use the arrow keys. Tiles are coloured by the row they belong in, and a white dot marks every tile already home, so you see at a glance what is done and what is not.
The trick that solves every sliding puzzle: solve the top row, then the first column, and keep shrinking the puzzle until only a small square is left. Place the last two tiles of a row together — park one, then bring the other round — and finish the last two rows together.
Every 3×3 and 4×4 level has par worked out by a solver as the shortest possible solution; on 5×5 par is the length of the scramble. Levels 1–7 are 3×3, levels 8–40 are 4×4 and from level 41 it is 5×5. Finish within 15% of par for three stars and within twice par for two. Every scramble is made by sliding tiles from the solved board, so every puzzle can be solved.
Slide 15 is free on crokocat and plays in the browser on desktop, phone and tablet with no download. A classic brain teaser from the 1880s, now with a solver keeping score.
How to play Slide 15
Put the numbers back in order:
- Tap a tile next to the gap to slide it in.
- Tap further along the gap's row or column to slide several at once.
- Or swipe toward the gap, or use the arrow keys.
- Solve the top row first, then the next, and finish the last two rows together.
- Beat par for three stars.
Game modes
| Mode | What changes | Who it's for |
|---|---|---|
| Levels | Scrambles get deeper, then the board grows from 3×3 to 4×4 to 5×5. | Anyone who likes a calm logic puzzle. |
Tips for Slide 15
- Solve the first row, then the first column, and keep shrinking the puzzle.
- Place the last two tiles of a row together: park one, then bring the other round.
- The white dots show which tiles are already home — try not to disturb them.
- Row colours tell you where a tile belongs at a glance.
- Sliding a whole line at once counts one move per tile.
Who made Slide 15?
Slide 15 was built by crokocat game studio in 2026 — the classic fifteen puzzle with solver-checked pars.
About this game
- Controls
- Tap a tile in the gap's row or column to slide it, or swipe toward the gap. Arrow keys work too.
- Supported devices
- desktop, phone, tablet
- Developer
- crokocat
- Genre
- Puzzle
- Release date
- September 2026
- Latest update
- September 2026
Related categories
Frequently asked questions
Is Slide 15 free to play?
Yes. Slide 15 is free on crokocat with no download and no sign-up — it runs in your browser on desktop, phone and tablet.
What is the 8 puzzle?
The 3×3 version of the sliding puzzle, with eight tiles and one gap. Slide 15 starts with it on levels 1–7 before moving to the classic 4×4 15 puzzle and then 5×5.
Is Slide 15 the classic 15 puzzle?
Yes. The 4×4 board is the classic 15 puzzle; Slide 15 also has a smaller 3×3 warm-up and a bigger 5×5 board.
Is every puzzle solvable?
Yes — every scramble is made by sliding tiles from the solved board.
What is par?
The fewest moves that solve the puzzle, found by a solver (on 5×5, the length of the scramble).
How do I move several tiles?
Tap a tile further along the gap's row or column.
How do I get three stars?
Finish within 15 % of par.
Guides & tips
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