Confirmed
The achievement name is Light It Up and its published requirement is “Turn on every light in the dusty den.”
Cleanup route
- Go to The Dusty Den and complete the puzzle first.
- At the front of the room, activate both floor switches.
- Click the shade of the desk lamp to turn that light on as well.
- If the achievement does not unlock, recheck both floor switches and the lamp before leaving the level.
Evidence status
Steam confirms the achievement wording. The two-switch-plus-lamp route is community-reported by Guidexon and TrueAchievements and still needs this site's own release-build verification.
Verification note
Do this cleanup in one Dusty Den visit until persistence is verified.
Sources & verification
This page separates confirmed public facts from release-build observations. Official sources are preferred for platform and product details; the published Xbox list is used for achievement names and requirements.
Official Steam page↗Steam achievements↗Official Woodo website↗Daedalic demo announcement↗Guidexon achievement route guide↗TrueAchievements Light It Up report↗Third-party published achievement list↗