QUICK ANSWER
Reach the island ruins, move between present and past, and learn how reflector chains open sealed doors.
The critical path
Reach the island ruins, move between present and past, and learn how reflector chains open sealed doors.
This page keeps the route compact so you can solve the immediate block without reproducing an entire published walkthrough. Follow the current objective until the environment presents a sphere receptacle, grapnel point, arena or light-safe zone, then use the chapter-specific note below.
- Treat every new receptacle as a source-to-mirror-to-target path; solve one beam at a time.
Collectible and replay check
Check side ledges, camps, bodies, small charm chests and white-glimmer Resonance Points before one-way drops. The profile and Chapter Select screens track the regular collectible categories.
Regular Blades, Artefacts and Charms can be recovered with Chapter Select. Resonance Points are the exception: their total does not carry forward from a replayed chapter, so a 165-point skill run should remain on one continuous playthrough.
If the puzzle stops you
Use the sphere to reveal markings before rotating anything. Trace each floor line to its symbol, or follow each light beam from source through reflectors to the matching receptor. Change one element at a time so you can see which part of the chain is wrong.
The dedicated puzzle guide groups the verified solutions for Chapters 4, 5, 6, 7, 10 and 11 and links back to the source walkthrough for the full surrounding route.
Quick player questions
Can I replay Chapter 3?
Yes. Chapter Select is available, but Resonance Points keep the amount recorded when you first reached that chapter rather than carrying a later total backward.
Are there collectibles in Those Before Us?
Yes. Use the in-game chapter tracker and the all-collectibles route before advancing through one-way transitions.
Sources
Primary game pages and specialist guides used for the facts on this page.
PowerPyxResonance guide hubPowerPyxAll collectible locationsPowerPyxAll puzzle solutionsGameSpewFull walkthrough with puzzles and collectibles
