Doom: The Dark Ages: Codex Entry Locations & Interactive Tracking Guide
Codex Entries are the primary source of lore in Doom: The Dark Ages, offering useful information about the history of the Night Sentinels, the Maykrs, and the origins of the Slayer’s new medieval arsenal.
There are 26 Codex Entries in total. Finding every one of them is mandatory to unlock the Lore Nerd trophy/achievement.
Codex Entries look like glowing, floating pieces of parchment. They are automatically marked on your map with a Paper Icon once you get close to them. While you can use Chapter Replay to go back and find them, it is best to collect them during your first run to stay connected with the context of the story.
Since many of these entries—like the Witch and Marok—are hidden behind puzzles, checking your map frequently is the best way to make sure you don't miss a single fragment. Alternatively, you can track them down using our interactive Doom: The Dark Ages game maps, accessed via the checklist below.
| Name | Map Location | Details |
|---|---|---|
| Doom SlayerChapter 1: Village of KhalimDoom Slayer | Chapter 1: Village of Khalim | Found on top of the mountain plateau, you can reach by climbing the two walls. |
| Sentinel BarracksChapter 4: Sentinel BarracksSentinel Barracks | Chapter 4: Sentinel Barracks | Found at the end of the alley by the large ramp, you must descend on your way to the boss. |
| Deag LoricChapter 5: The Holy City of AratumDeag Loric | Chapter 5: The Holy City of Aratum | Found on the lowest level of the carrier. |
| Kreed MaykrChapter 6: Siege – Part 1Kreed Maykr | Chapter 6: Siege – Part 1 | Found on the upper plateau. |
| Siege – Part 1Chapter 6: Siege – Part 1Siege – Part 1 | Chapter 6: Siege – Part 1 | Found on top of a large flat stone. You can reach it by jumping on the metal beam at the base of the rock. |
| The Forsaken PlainsChapter 10: The Forsaken PlainsThe Forsaken Plains | Chapter 10: The Forsaken Plains | Found on the balcony past the corridor with the fire traps. |
| Sentinel Command StationChapter 12: Sentinel Command StationSentinel Command Station | Chapter 12: Sentinel Command Station | Inside a Hidden Cave on a side path. |
| Hell PriestsChapter 19: Harbor of SoulsHell Priests | Chapter 19: Harbor of Souls | Behind some metal bars. To reach it, approach it from the northern room. |
| Village of KhalimChapter 1: Village of KhalimVillage of Khalim | Chapter 1: Village of Khalim | Found in the camp on the hill after climbing the wall on the path along the beach. |
| HebethChapter 2: HebethHebeth | Chapter 2: Hebeth | Found in the secret camp behind the crates, you can reach by jumping away from the main path while on the middle floor. |
| The Holy City of AratumChapter 5: The Holy City of AratumThe Holy City of Aratum | Chapter 5: The Holy City of Aratum | Found at the end of the lower corridor in the large hall reached by climbing the Metal Box. |
| Siege - Part 2Chapter 7: Siege – Part 2Siege - Part 2 | Chapter 7: Siege – Part 2 | Between two fires at the end of the Secret Corridor. |
| Abyssal ForestChapter 8: Abyssal ForestAbyssal Forest | Chapter 8: Abyssal Forest | Found behind the roots you can bash. |
| Ancestral ForgeChapter 9: Ancestral ForgeAncestral Forge | Chapter 9: Ancestral Forge | Down, on the wooden platform next to the climbable wall. |
| King NovikChapter 9: Ancestral ForgeKing Novik | Chapter 9: Ancestral Forge | On a ledge you can reach after using the Shield Jump. |
| Prince AhzrakChapter 10: The Forsaken PlainsPrince Ahzrak | Chapter 10: The Forsaken Plains | Found at the end of the corridor past the Purple Gate. |
| Spire of NerathulChapter 14: Spire of NerathulSpire of Nerathul | Chapter 14: Spire of Nerathul | On a ledge you can reach by going down from the Jump Point. |
| SerratChapter 14: Spire of NerathulSerrat | Chapter 14: Spire of Nerathul | Found after the Point of No Return, just before the elevator you need to use to progress. |
| City of Ry'uulChapter 15: City of Ry’uulCity of Ry'uul | Chapter 15: City of Ry’uul | In the Hidden Area, after climbing the wall. |
| The WitchChapter 16: The Kar’Thul MarshesThe Witch | Chapter 16: The Kar’Thul Marshes | In the Hidden Cave behind the Gate. |
| Temple of LomarithChapter 17: Temple of LomarithTemple of Lomarith | Chapter 17: Temple of Lomarith | Underwater, in the Hidden Area of a shipwreck. |
| Commander ThiraChapter 18: Belly of the BeastCommander Thira | Chapter 18: Belly of the Beast | Next to a hole and an acid river after completing the Encounter. Move quickly, because the acid can cause damage. |
| Harbor of SoulsChapter 19: Harbor of SoulsHarbor of Souls | Chapter 19: Harbor of Souls | Found next to the tilted, withered tree on the left side after jumping over the gap and going down the stairs in front. |
| ResurrectionChapter 20: ResurrectionResurrection | Chapter 20: Resurrection | In the back of the Hidden Cave behind the Yellow Gate. |
| Commander ValenChapter 20: ResurrectionCommander Valen | Chapter 20: Resurrection | Found after landing on Kreed's Ship, by the edge (turn around after you land). |
| MarokChapter 22: ReckoningMarok | Chapter 22: Reckoning | In a small cave you can reach by going through the Weak Wall, dropping from the ledge, and heading to the right. |
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