A key matter is a hidden achievement. Reveal the requirement and checklist below when you are ready for story spoilers.
Reveal hidden requirement and guidance
Find the police station keys.
What to check
This concerns police-station keys. The numeric safe combination and lockpicks solve different interactions.
Record your progress
Use this local checklist for A key matter. It does not connect to Steam or unlock anything in the game. Steam's own achievement state remains authoritative.
- Find the police station keys.
- Confirm A key matter is unlocked in Steam.
If the unlock does not appear
Keep the relevant objective or counter screenshot and your build information. A requirement description does not prove an unlock bug, and an older patch fix is not a guarantee for a new regression. Do not delete saves or use an achievement unlocker to troubleshoot.
Your checklist
0 / 2Saved on this browser only. No Steam connection.
Sources & build scope
Full release · official patch notes; not a local gameplay retest. Source review is separate from a gameplay test.
- Steam: global achievements ↗Tier A · Public names and visible conditions
- Steam: publicly unlocked achievement descriptions ↗Tier C · Player-visible hidden conditions; spoilers