How to play
Sortlock is a sort-balls-by-colour puzzle with one twist: some balls are hidden and you have to deduce them with logic. The rule clicks in 5 seconds; the depth lasts hundreds of levels.
Goal
- Sort the balls so every flask is filled with a single colour — or left empty.
- When a flask is full of one colour it is "solved" and seals shut with an animation.
How to move
- Tap a source flask, then a target flask — the top ball flies over.
- You can only pour onto an empty flask or onto a ball of the same colour.
- You cannot stack a ball on a different colour or overflow a flask.
Deduction layer
- A ball marked "?" is hidden — its colour is unknown.
- Work out the colour from the clues: colour counts, flask rules and already-revealed balls.
- You may move a hidden ball, but it pays to think first — every board has a single logical solution.
Hints & undo
- "Undo" rolls back your last move; "Hint" reveals the next logical step as a leading question, not a ready-made answer.
- In Endless and the Easy/Normal tiers, undo and hints are unlimited and free.
- Competitive modes are stricter: the Daily board and the Hard/Expert tiers cap undos and hints, and Expert and the Daily board add a small time penalty for each one used.
When you get stuck
- If a board reaches a dead end with no useful moves, Sortlock tells you right away.
- Undo the last move, Restart the level, or Shuffle the balls into a fresh, still-solvable arrangement of the same shape.
Accessibility
- Every colour is paired with a letter on the ball: R, B, G, Y, P, O and so on.
- A hidden ball is marked "?". Colour is never the only way to tell balls apart — the game is colour-blind friendly.
- Play in English, Español, Français, Deutsch or Беларуская, with a "reduce motion" option to save battery.
Daily board & Echo duels
- Every day there is one shared board for all players in the world.
- Solve it against a rival’s "echo": their ghost replays the moves and shows their reasoning. Win by using fewer moves.
- Climb the daily ranking, keep a streak, challenge a friend with a 6-character code and share a spoiler-free result card.
Four ways to play
The same deduction puzzle, four flavours. Difficulty is shown as a 1–10 ⚡ rating you can tap any time to switch.
Endless
Adaptive difficulty just for you — boards that tune to your skill and never run out.
Daily board
One board for all players, plus an echo duel against a rival ghost matched to your skill.
By difficulty
Pick a tier — Easy, Normal, Hard or Expert. The same levels for everyone, refreshed daily.
Echo competitions
A daily ranking of the best daily-board solutions — fewest moves, fastest time.
Difficulty tiers
What the balls mean
Tips for beginners
Solve the "cheap" deductions first — the ones where a single colour remains possible.
Free up a whole flask: an empty flask is your most valuable resource.
Count the balls of each colour — the counter almost always hints the hidden one.
Don’t move a "?" at random: a wrong reveal costs you a move.