Final Fantasy 15: How to Unlock Menace Dungeons

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There are eight slumbering menaces lurking in Final Fantasy 15 where your party will take on super-hard dungeons that only become available in the post-game, after you’ve completed all 14 chapters of the story. These areas aren’t just tough — you’ll also find the best equipment, weapons, and gear inside these optional chambers.

Each of the ‘menace’ dungeons is a tough slog that’s more challenging than anything else in Final Fantasy 15, so if you’re ready, check out the guide below to see where to get the key to those mysterious vault doors. All you have to do is complete certain dungeons and find a specific old lady you’ve likely passed by often in the overworld.

More Final Fantasy 15 secrets, tips, and guides:

How to Unlock ‘Slumbering Menace’ Dungeons | Post-Game Guide

Before taking on a Slumbering Menace Quest, you’ll need to fulfill the following requirements:

Prerequisites:
- Complete all 14 Chapters to reach the post-game overworld.
  - After completing the game, you’ll be directed to make a new save file.
- Complete these four dungeons where locked vault doors are located:
  - Balouve Mines (In the mine south of the Callaegh Steps map title)
  - Costlemark Tower (The large circular structure in The Fallgrove)
  - Crestholm Channels (Under the bridge in Ostrum Gorge checkpoint)
  - Daurell Caverns (Built into Schier Heights)

Once you’ve completed these steps, you can now access the slumbering menace vaults. There are eight strange vault door locations, to unlock these doors, you’ll need to talk to the old woman that is now available in Medacio Hunter HQ.

Menace Quest-Giver Location:
- Meldacio Hunter HQ – Talk to the old woman sitting on the porch. She gives you the Vault Key that opens up all eight unique vault doors found in dungeons, tombs, and ruins across the map.

After talking to the old woman, multiple new side-quests will be added to your docket automatically.

‘Menace Quests’ List
- A Menace Sleeps in Keycatrich
- A Menace Sleeps in the Grotto
- A Menace Sleeps in Fociaugh
- A Menace Sleeps in Durell
- A Menace Sleeps in Balauve
- A Menace Sleeps in Steyliff
- A Menace Sleeps in Crestholm
- A Menace Sleeps in Costlemark

Selecting a quest will direct you to each vault door. These quests can be completed in any order, and they offer the very best equipment and toughest enemies available in Final Fantasy 15. If you’re ready to accept the ultimate challenge, this is where you’ll want to get started.