What it opens
Haneul Nuclear Reactor →Area grid I4 Look beneath the transformer area beside Reactor 01. H4 is a reported room clue, not a key pickup location. The map shows a wider reactor search area; the exact entrance is unverified.
Key
Utility Maintenance Storage
Reported Rare key for the maintenance room beneath the transformers beside Reactor 01 at Haneul Nuclear Reactor; the listing gives H4.
- Rarity
- Rare
- Grid
- H4
Use this key
Key Finder →Haneul Nuclear Reactor →Area grid I4 How to get it
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No fixed pickup location is verified.
Availability and unknowns
- Key acquisition, number of uses, extraction persistence and room loot are not documented. Check the complete lock name before using a key.
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