Where to Find the Secret Key in Chapter 6 in DOOM The Dark Ages

By Daniel Hidalgo | 2025-05-15 10:26:48
In DOOM The Dark Ages, Secret Keys are essential for unlocking hidden pathways and exclusive rewards. Chapter 6, The Siege Part I, introduces an expansive open-world battlefield filled with demonic hordes, making it easy to miss the Secret Key and its associated doors.
This guide will help you locate the Chapter 6 Secret Key and reveal all three secret doors, ensuring you don’t miss any valuable collectibles, weapon skins, or power-ups.

How to Find the Secret Key in Chapter 6


As soon as you drop into Chapter 6, you’ll land in a chaotic demon-infested warzone. Instead of veering off course, follow these steps to secure the Secret Key quickly:
  • Move Forward Toward the Forest – From your starting point, head straight across the battlefield embankment into the wooded area.
  • Check Your Automap – The Secret Key’s location will appear as a red-sealed barrier on a raised wooden platform.
  • Clear the Area – Eliminate all nearby demons to break the barrier and claim the Secret Key.

  • With the key in hand, you can now unlock three hidden doors scattered throughout the level.

    All Secret Doors in Chapter 6


    Each secret door contains unique rewards, from collectibles to weapon upgrades. Here’s where to find them:

    1. Cliffside Secret Door (Near the Key Location)


    • Location: After picking up the Secret Key, turn around and head toward the nearby cliff wall.
    • Reward:
      • Slayer Secret Collectible (Toy) – A rare item for completionists.

    2. Lever Puzzle Secret Door (Far Left of Starting Area)


    • Location: From the beginning of the level, climb the scalable wall to reach ahidden area with a lever puzzle and a large water pool. Stick to theleft wall to find the door.
    • Reward:

      • Nightmare Skin for the Impaler – A visually striking weapon customization.

    3. Sealed Cave Secret Door (Opposite Side of the Map)


    • Location: Near the third objective marker, look for a cave entrance sealed with a red barrier. Defeat the demons guarding it, then drop inside and checkthe right wall.
    • Reward:

      • Ruby & Ammo Pickups – Useful for upgrading weapons and replenishing supplies.

    Final Tips for Chapter 6 Exploration


    • Use the Automap Frequently – It highlights key locations, including hidden doors.
    • Prioritize Demon Elimination – Some barriers only unlock after clearing enemy waves.
    • Explore Thoroughly – The open-world design hides many secrets beyond the main path.


    By following this guide, you’ll unlock every hidden door in DOOM The Dark Ages Chapter 6 and maximize your rewards. Stay vigilant, Slayer—hell’s legions won’t know what hit them!

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    • Target Keywords: DOOM The Dark Ages Chapter 6, Secret Key Location, Secret Doors, Nightmare Skin, Slayer Collectible
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    Platform(s): PlayStation 5 PS5, Windows PC, Xbox Series X/S
    Genre(s): First-person shooter
    Developer(s): id Software
    Publisher(s): Bethesda Softworks
    Engine: id Tech
    Release date: May 15, 2025
    Mode: Single-player, multiplayer
    Age rating (PEGI): +18
    Video preview



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