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

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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