The Forgotten Mechanism

Open the box. Then the next one.

The Forgotten Mechanism is a collection of 129 handmade mechanical puzzle boxes. Each one opens its own way: hidden drawers, dials and gears, sliding panels, ciphers, keys that lead to other keys. Turn a box in your hands, look closely at every engraving and work out how it opens. Everything you need is on the box.

Puzzles for every level
• 129 puzzle boxes in 27 collections, from Beginner to Master
• Clockmakers' cabinets, astral vaults, a fruit machine, a cryptex, a crossword and many more
• Collectibles to keep from the boxes you open
• The Masterpiece waits at the end

Stuck? Hints, one step at a time
Each hint gives you a nudge first, then gets clearer, and Show me lights up the part to try. Or take the No-Hint Challenge and open every box on your own.

Something new every day
The Daily Mechanism picks a box for each day. Keep your streak going.

Build your own
In the Puzzle Workshop you make your own puzzle boxes: snap on buttons, drawers, dials and locks, tell each part what it does in plain words, test it and share it with friends as a puzzle code.

Free to start, no ads
The first five collections, 19 boxes, are free. One purchase unlocks the full game: all 129 boxes, yours to keep. No ads, no subscription, no time limits.

Made for comfortable play
• Plays offline
• Cloud save with Google Play Games: carry on from a new phone
• Larger text and Reduce motion options
• English, Español, Português, Français, Deutsch and Italiano