Metathesis

Metathesis
Identifier:	Abyss-10
Area:	Into the Abyss
Previous Puzzle:	Color Theory
Next Puzzle:	The Ring

Metathesis is the tenth puzzle in Into the Abyss, part of the Road to Elysium expansion for The Talos Principle 2.

Puzzle Elements

• Blue door
• Emitter
• Ladder
• Pressure plate
• Receiver
• RGB converter

Overview

The puzzle is a variation of Metaphora, where the Inverter in the second room has been replaced by a fourth RGB converter, and where two additional cells are located on each side of the first room.

Hints

If you have trouble getting started:

[ hint ]

The first order of business is to retrieve the two RGB converters from the side cells.

If you have trouble with intersecting lasers:

[ hint ]

Remember that there are two Receivers on the side of the room that can be used as extra connection targets to block out unwanted lasers.

If the Blue door keeps closing just after it opens:

[ hint ]

When the door opens, the fourth RGB converter starts emitting lasers that you don't need, cutting the ones you do need and causing the door to close. How can you prevent this from happening? Remember that an RGB converter only emits lasers when it receives exactly two colors, no more, no less.

Solution

[ solution ]

• 
  Connect the RGB converter to both Emitters, as well as the green Receiver on the side.
• 
  Take the second RGB converter, connect it to the red Emitter, green RGB converter and both blue Receivers.
• 
  Bring the third RGB converter into the main area.
• 
  Disconnect the green RGB converter from the side cell.
• 
  Connect the third RGB converter to the blue Emitter, green converter and red Receiver.
• 
  Connect the fourth RGB converter to all three converters, as well as both Emitters. This will cause the Blue door to close; walk back into the first room before it happens, or take the Ladder if you get locked in.
• 
  Add both Receivers on the side to the green RGB converter's targets. These extra beams will block out the ones coming from the Emitters to the fourth converter, allowing the door to open again. Additionally, the green beam to the fourth converter causes it to receive three colors, preventing it from emitting beams that would cause the door to close.
• 
  Pick up the green RGB converter. This causes the fourth converter to receive red and blue from the Emitters, sending green to both side converters, maintaining the Blue door open.
• 
  Bring the RGB converter to the first Pressure plate.
• 
  Take the fourth RGB converter and place it on the second Pressure plate, finishing the puzzle.

Alternative solutions

"Sleight of Hand"

[ alternative solution ]

Grabbing the green RGB converter before the Blue door closes.

If you position the green RGB converter close enough to the Blue door during step 5 of the intended solution, then it is possible to grab it before the door closes at step 6.

"Timed deconstruction"

[ alternative solution ]

State of the puzzle before removing the green RGB converter.

Forgetting to connect the green RGB converter to the fourth converter during step 7 of the intended solution causes the Blue door to open and close endlessly as the fourth converter emits green lasers that interfere with the setup.

However, picking up the green converter while the door is open solves the interference, reaching the same state as step 8, albeit in a less elegant way.

"Body blocking"

[ alternative solution ]

Grabbing the RGB converter before the door closes.

After step 6 of the intended solution, instead of blocking interfering lasers by using the Receivers on the side, it is possible to block one of them with the green RGB converter, and the other one with Byron's body. Doing this causes the door to open and close similarly to the #"Timed deconstruction" solution. When the door opens, run and pick up the converter before the door closes.