The Room 3 walkthrough - The Imprisoned Ending
Chapter 1 + 2 - The Lighthouse | Chapter 3 - The Clock Tower
Chapter 4 - The Workshop | Chapter 5 - The Observatory
And so The Room 3 has come to an end. We've got the last pyramid. We pop it down on the table and we get the craftsman's key - and the door to the final room.
But there's a bit more to it than that.
There are actually four endings to the room. Below, you'll find the first and default ending. Just solve the last puzzle and you'll be on your way to the imprisoned ending.
The other endings - Escape, Release, and Lost - can be discovered by solving a few more puzzles, dotted around the hub world you have been using to access the main chapters in the game.
For starters, though, let's get ending number one.
Place the final pyramid on the table, and take the craftsman's key. Go through the doorway that appears.
Place the craftsman's key on the top of this weird tent thing to crack it open.
Take this metal ring.
Place the metal ring on the front of the box. Spin it around until the hole opens. Go inside with your eyepiece.
Here, you need to make thee holes appear underneath the three pistons. To do this, spin the gold disc until the hole on the rear dial lines up with the piston. Use the brass handle to move the cog. Repeat this until all three holes are lined up, like above.
Press the button
Move this mirror to bounce the light around.
Take this mirror from a compartment on the table.
Place it here. Then move the first mirror back to its original position. You'll be taken to a hole - enter inside, using your eyepiece.
You now need to spin all the light beams until they are pointing at the red crystal, like above. Use one button to lock two of the beams in place, and the other to rotate the unlocked ones. It's all about getting them in sync.
When that's done, enter the train door to get the Imprisoned Ending.