The Sinking City 2 Portal Device Puzzle (Cold Comfort)

How the portal device works

The Sinking City 2 portal puzzle closes Cold Comfort with a mechanism rather than a fight, and the mechanism is deliberately spatial. The device has four faces, each with pieces that can be moved, and it only activates when every face is aligned at once. There is no code and no document — this is the game checking whether you have understood how it wants you to look at objects.

Adjusting one face can disturb another, so treat it as a loop: adjust, walk around, check, adjust again.

Step-by-step

1. Circle the device once before touching anything. Note which faces are already close to aligned — usually one or two are.
2. Fix the worst face first. Large corrections early, fine corrections later.
3. Re-check the two adjacent faces after every change, not just the one you touched.
4. Finish with the face you started on. It is almost always the one knocked out of true by the others.
5. Activate. With all four aligned, the portal opens.

Before you activate it

This is effectively a point of no return. Once the portal sequence starts, Cold Comfort runs toward the finale and the game does not hand you a chapter select afterwards. Anything you have not collected in this chapter is gone until New Game Plus.

Do this first:

• Run the missable checklist for chapter 5.
• Spend any banked Dream Essence at the Talent Table — there is no reason to hold it now.
• Top up ammunition. The final boss is a damage check more than a puzzle.

What comes after the portal

Without spoiling specifics: the portal leads into the last stretch of the story and the final encounter. Our Slither Prime guide covers the fight itself, and the endings section covers what changes at the close — including an honest note about what Frogwares has and has not confirmed about the number of endings.

We do not repeat the invented ending names that circulated in the first week. If a site quotes a named ending as fact, ask where the studio said it — the honest answer, as of August 2026, is that Frogwares has published no ending count and no ending names at all.

If the device will not activate

• One face is still out. Four faces, not three — the back one is easy to forget because you never stand there.
• You are judging alignment from an angle. Line yourself up square to each face before deciding it is correct.
• You are missing a chapter item. If a slot on the device is empty rather than misaligned, you have not picked up everything Cold Comfort expects.
• Something is stuck. Reload the last save — Frogwares' standard fix for collision issues, and the one piece of troubleshooting the studio repeats most often in its own FAQ.