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The Factory Door is a puzzle in Professor Layton and the Last Specter. The puzzle must be solved in order to progress the story.

Puzzle

US Version

You have the key to this door's lock, but there doesn't seem to be a keyhole.

If fact, the doorknob and the buttons to the right of it move when you touch them. Maybe they form some sort of combination lock...

But then what's the key for?

UK Version

You have this key with a "C" on one side that belongs to this lock, but there doesn't seem to be any keyhole.

In fact, the doorknob and the buttons to the right of it move when you touch them and seem to form some kind of combination lock.

But then, what's the key for?

Hints




Click a Tab to reveal the Hint.

US Version

You can't move the key, which is fine, since there's no keyhole to put in it.

But the key is still essential to unlocking the door. Try to determine which aspects of the key may hold a clue to the door itself.

UK Version

You can't insert the key into the lock.

However, the key is essential to unlocking the door. Look at it closely and try to find some link between it and the door.

US Version

There is a distinct similarity between the design of the door and the design of the key, wouldn't you agree?

UK Version

There seem to be some similarities between the design of the door and the design of the key.

That must mean something!

US Version

The correct orientation for the doorknob is not C.

Consider how the position of the doorknob relates to the buttons on the door. This should give you a clue.

UK Version

The correct orientation for the doorknob is not "C".

Consider how the position of the doorknob relates to the buttons on the door. This should give you a clue.

US Version

There are six buttons up on the door and six teeth on the key.

So you need to match the buttons with the teeth. Just be careful about the orientation of the key when comparing it to the lock!

UK Version

There are six buttons lined up on the door and there are six teeth on the key.

You must have to match the buttons with the teeth. Just be careful about the orientation of the key when comparing it to the lock!


Solution

Incorrect

US Version

Too bad!

Take a closer look at the key.

UK Version

Too bad.

Take a good look at the key.

Correct

Correct!

The "C" on the key represents the doorknob, and the teeth on the side represent the buttons.

LS129S

A big thanks to http://professorlayton4walkthrough.blogspot.com

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