The twentieth chapter of DOOM: The Dark Ages has more collectibles and secrets than any other chapter in the game. The bulk of the action takes place in the Darkveil Forest area, where players will need to drive back Ahrzak's forces and destroy the three siege towers to ease pressure on the Sentinels.

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The Best Guns in DOOM The Dark Ages (Weapon Tier List)

This DOOM: The Dark Ages weapon tier list ranks all of the guns based on their damage potential and the usefulness of their upgrades.

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After doing so, the Slayer's dragon will swoop down, signalling a point of no return. Before leaving, DOOM: The Dark Ages players who are hoping to find every collectible will no doubt do one final sweep of the area, only to find that they're still missing one collectible and one secret. This guide explains where to find them.

Where to Find the Last Collectible in Chapter 20 of DOOM: The Dark Ages

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Assuming they're only missing one secret and one collectible, players should mount the Slayer's dragon and continue through the chapter as normal. Once they land on Bishop Kreed's ship, rather than heading inside as instructed, they should turn around and walk to the very back of the ship. Here, they'll find a secret area and the final collectible in Chapter 20: a codex entry for Commander Valen.

All Chapter 20 Secrets and Collectibles

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To achieve 100% completion on Chapter 20, players will need to complete the Cannon Crusher, Extreme Prejudice, and Master Hunter Challenges, as well as track down every secret and collectible that the stage has to offer. For those who find themselves missing more than just one secret and one collectible before mounting the Slayer's dragon, the following exploration checklist should help them figure out what they're missing.

  • Gold (392)
  • Ruby (3)
  • Wraithstone (1)
  • Demonic Essence - Health (1)
  • Demonic Essence - Armor (1)
  • Demonic Essence - Ammo (1)
  • Secrets (12)
  • Codex Entries (2)
  • Collectible Toys (2)
  • Skins (1)

Like the final collectible and secret, players won't be able to complete the Master Hunter challenge until after they have mounted the Slayer's dragon.

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8 /10

DOOM: The Dark Ages
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FPS
Action
Sci-Fi & Fantasy
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Systems
PC-1 PlayStation-1 Xbox-1
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Top Critic Avg: 86 /100 Critics Rec: 95%
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Released
May 15, 2025
ESRB
M For Mature 17+ // Blood and Gore, Intense Violence
Developer(s)
id Software
Publisher(s)
Bethesda Softworks
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5 Images
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'I Don't Agree With That' Doom: The Dark Ages Director Responds to 'Woke Ages' Criticism
'I Don't Agree With That' Doom: The Dark Ages Director Responds to 'Woke Ages' Criticism
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WHERE TO PLAY

SUBSCRIPTION
DIGITAL
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Engine
id Tech