How to play
Put the numbers in order, with the empty space last.Tap a tile next to the empty space to slide it. Arrow keys or WASD move an adjacent tile in that direction. Every shuffle is made from legal moves, so every board can be solved. Undo lets you reconsider a move.
Choose 3×3 for a short puzzle or 4×4 for a longer challenge. Best move counts are stored separately for each size.
How do I save or earn rewards?
Games save in this browser. Log in before starting a fresh game to save achievements and earn Forge Tokens. Guests can play freely but do not earn rewards.
Can I undo or pause?
Use the controls above when available. Undo and hints remain useful for practice, but some achievements require a fresh unassisted game. Arcade runs pause when you leave the page.