DOOM Dark Ages All Secrets & Collectibles Guide (Full Game)

Table of Contents

1. Collectible Types Overview
2. Preparation: Tools for Efficient Collection
3. Chapter-by-Chapter Secret Locations
4. Mission Challenge Secrets
5. Post-Game Collectibles
6. Important Notes
7. Final Take
8. Needs Verification

Collectible Types Overview

DOOM: The Dark Ages scatters five categories of collectibles across its 22 chapters:

Type	Purpose	Required for Platinum?
Demon Toys	Lore / completionist	No
Codex Pages	Story expansion / lore	No
Demon Essences	Upgrade currency (miniboss drops)	Indirectly
Gold	Gear upgrades / Mastery Challenges	Yes (for Berserker trophy)
Rubies & Wraithstones	Chapter 17 challenge	Yes
Secret Areas	Mission challenges / completion	Yes (per-chapter)
Weapon Skins	Cosmetic	No

The critical distinction: mission challenge secrets must be found during the challenge window, while lore collectibles and weapon skins can be gathered on any replay.

Preparation: Tools for Efficient Collection

The Exploration Mindset

DOOM: The Dark Ages rewards players who hug every wall, check every shadow, and break every suspicious surface. Secret areas are hidden behind:

• Breakable walls (look for cracks, discoloration, or slightly different textures)
• Illusory walls (walk into them — they don’t have collision)
• Hidden paths off the main route (often behind optional combat encounters)
• Underwater sections (especially in Chapters 16-17)
• Elevated platforms reachable via Chain Spear grapple

The Chain Spear is Your Search Tool

The Chain Spear isn’t just a combat weapon — it’s your primary exploration tool. Many secret areas are positioned on elevated platforms, across gaps, or behind high walls that require a grapple to reach. If you see a ledge that looks out of place, grapple to it.

For the full Chain Spear optimization breakdown, see our chain spear upgrades guide.

Save Before Every Suspected Secret

Some secret areas trigger combat encounters or environmental hazards. Save manually before investigating so you can reload if you walk into an ambush without the right loadout.

Chapter-by-Chapter Secret Locations

Chapters 1-3: The Tutorial Stretch

These chapters have minimal secrets but establish the exploration patterns you’ll use later.

• Chapter 1: One breakable wall near the village exit leads to a small cache with Gold and a Codex Page.
• Chapter 2: An elevated platform reachable via Chain Spear contains a Demon Toy.
• Chapter 3: No secrets. These chapters are combat-focused.

Chapters 4-6: First Real Checks

• Chapter 4: Find 150 Gold is a mission challenge. Gold is scattered in hidden alcoves and behind breakable walls throughout the chapter. Three secret areas total — two behind breakable walls in the main combat arena, one in an underwater side passage.
• Chapter 5: Hidden dragon mount spots and flying vessel approach routes. Explore the peripheral areas before engaging the main encounter. Two secret areas behind illusory walls in the swamp approach.
• Chapter 6: Four cannons to destroy, plus a hidden alcove containing a Codex Page behind the eastern wall of the main arena. The Flail usage challenge (25 times) encourages exploring side paths where Flail pickups are more abundant.

Chapters 7-9: The Secret Dense Zone

This is where the game opens up and rewards thorough exploration.

• Chapter 7: Ten charged Chain Shot hits on targets — some targets are in hidden areas. Explore the perimeter before starting the challenge. Three breakable walls reveal secret caches.
• Chapter 8: Shield rush stunned enemies for five kills. Secret areas here are behind environmental hazards — wait for the right moment to explore between enemy waves. One hidden alcove contains a rare Demon Essence drop.
• Chapter 9: Discover 7 secret areas — the highest concentration in the game. These are scattered throughout the chapter:
  1. Breakable wall in the starting corridor
  2. Elevated platform (Chain Spear grapple) past the first combat encounter
  3. Underwater passage beneath the central arena
  4. Hidden room behind the northern wall of the second arena
  5. Illusory wall in the loot corridor
  6. Side passage accessible after defeating the miniboss
  7. Underground cache beneath the exit platform

My experience: Chapter 9 is where most players miss at least one secret on their first pass. The underwater passage (#3) is easy to miss because it requires diving from a specific ledge that isn’t marked. I burned two reloads before finding it.

Chapters 10-14: Escalating Complexity

• Chapter 10: Ground fissure rune on 25 targets — some targets are in hidden areas. Two secret rooms behind the arena’s eastern and western walls.
• Chapter 11: Mechanical suit section. Perfect evasion challenge means you’re focused on survival, but two secret areas are accessible during the suit’s downtime phases.
• Chapter 12: Two hidden entrances to unlock — these are explicit mission challenge secrets. Both are behind breakable walls that require specific weapons to reveal (Combat Shotgun blasts expose the cracks).
• Chapter 13: Perfect evasion challenge plus two flying vessels. One secret area behind the arena’s northern wall, accessible only after destroying both vessels.
• Chapter 14: Turret damage challenge (250 bullets). The turrets are positioned near a hidden alcove containing a Codex Page and Gold cache.

Chapters 15-17: The Underwater Stretch

• Chapter 15: Storm relic stun challenge (8 foes, 3 times). Brain projectile deflection. One secret area accessible after the third storm relic activation.
• Chapter 16: Wolf statues in the swamps must be destroyed. These statues are scattered throughout the chapter — some are in hidden areas. Destroying all of them reveals a bonus room with a Demon Toy and Gold.
• Chapter 17: Find 3 underwater secrets and collect all Rubies and Wraithstones. This is the most demanding collection chapter:
  • Underwater Secret 1: Dive from the eastern platform in the first underwater area
  • Underwater Secret 2: Behind a breakable wall in the central trench
  • Underwater Secret 3: At the bottom of the deepest pool, past the current hazard
  • Rubies: 5 total, scattered across dry and underwater sections
  • Wraithstones: 3 total, all in underwater sections

For a deeper dive into the Osseus region’s hidden content, our Osseus 100% secrets route covers every hidden corner in detail.

Chapters 18-22: The Final Stretch

• Chapter 18: Optional stomach battle. The stomach itself contains a hidden cache with a Codex Page. Cosmic leader projectile deflection — one secret area accessible after deflecting all 10 projectiles.
• Chapter 19: Rage-fueled combat (75 foes while enraged). Three treasure containers to break. Animated finishers (25). One secret area accessible only while in the enraged state — look for the breakable wall that glows during rage.
• Chapter 20: Cannon destruction and ritual group elimination. One hidden area behind the final cannon’s platform.
• Chapter 21: No secrets. Pure combat focus.
• Chapter 22: Final boss chapter. No secrets — just survival.

Mission Challenge Secrets

Some secrets are tied directly to mission challenges and must be completed during the challenge window:

Chapter	Challenge	Secret Requirement
7	Chain Shot targets	Hidden targets in secret areas
9	Secret area discovery	7 areas to find
12	Hidden entrances	2 explicit secret doors
16	Wolf statues	Destroy all in swamps
17	Underwater secrets	3 underwater areas
19	Treasure containers	3 breakable containers

Critical note: If you miss a mission challenge secret during your first playthrough, you can replay the chapter, but the challenge conditions must be met during that replay.

Post-Game Collectibles

After completing the main campaign, additional collectibles become available:

• Mastery Challenges — unlocked by spending Gold on all defensive gear simultaneously (the “Berserker” achievement). These are separate from chapter secrets.
• Weapon Skins — hidden throughout post-game areas and the Ripatorium 3.0. These don’t count toward platinum but are completionist bait.
• Master Key content — the master key endgame route contains exclusive lore collectibles and a hidden Codex section.

Important Notes

• Don’t restart checkpoints after grabbing Demon Essences. Multiple players have reported progress desyncs when restarting immediately after collecting upgrade currency. Save manually first.
• Weapon skins and secrets don’t count toward platinum. If you’re going for 100% completion, focus on mission challenges and Mastery Challenges first, then circle back for cosmetics.
• The Berserker achievement requires buying all defensive gear at once. Hoard your Gold until you can purchase everything in a single playthrough. This is a common trap — players spend Gold incrementally and then can’t trigger the achievement.
• Chapter select is your friend. Revisit chapters with a full weapon loadout to access secrets that were unreachable during your first pass (e.g., underwater areas before you have the right mobility mods).

Final Take

DOOM: The Dark Ages hides more content than most players will find on a single playthrough. The 22-chapter campaign contains roughly 35+ secret areas, 20+ Codex Pages, 15+ Demon Toys, and numerous Gold/Essence caches that fuel your upgrade progression.

The key insight: exploration in this game isn’t optional flavor — it’s mechanically rewarded. The Gold you find in secret areas directly funds your defensive gear, which directly impacts your survivability on higher difficulties. The Codex Pages expand the lore, yes, but the Demon Essences from miniboss encounters (often hidden behind secret paths) are your primary upgrade currency.

If you’re aiming for 100% completion, prioritize mission challenge secrets during your first playthrough and treat lore collectibles as a post-game cleanup project. And if you want the deepest dive into a specific region, our Osseus 100% secrets route covers every hidden corner of that notoriously dense area.