Red Nun's Legacy walkthrough
Checked . Intent: Mechanics and the limit of current guides.

I wanted a room-by-room list the week the game shipped. The achievement site’s own page still said the walkthrough was missing. I wrote the systems I could verify and left the puzzle answers out.

Systems from the official FAQ
Retrocognition, mirror abilities, and moth manipulation are how hidden paths open. Later powers reopen earlier rooms. Saves are automatic, and you can set a metronome save. There is one difficulty and one ending. A first clear is estimated at about eight hours.
- Blast from the Past — 30 retrocognition items (one guide)
- Through the Looking-Glass — 20 mirror secrets (one guide)
- Top of the World — a document tying Rosemary to Madame Svenska (one guide)
Collectibles, one source only
100% Guides lists 113 collectibles in six groups and four types: documents, items and photos, maps, and retrocognition memories. It names an early route through the exterior and a Noble Wing (reception, art gallery, Sala delle Meraviglie, library) before Cristo Morente. TrueAchievements has not published a matching route. Treat the area names as that guide’s labels, not official chapter titles.
Steam’s achievement names that hint at themes, without steps: The miracle of life, Mirror mirror, Moth-er Dearest, Freefall, Rubedo. There are 33 Steam achievements.
Questions
Why is this not a full step list?
TrueAchievements says there is no walkthrough. One collectible guide exists. Puzzle solutions are not copied until a second independent guide matches them.
Can I replay a chapter for a missed item?
The collectible guide says there is no chapter select, so missed items need the same playthrough. That claim is one source.
Can I kill the stalker?
The official FAQ says you can hide and briefly knock a stalker down. You cannot remove them for good. A grab can kill you.