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DOOM Eternal - All Codex Entries, Secret Encounters and Runes (The Ancient Gods Part One DLC)

Written by Ming   /   Oct 28, 2020    


In this guide, i'll show you locations of all the codex entries, secret encounters and runes.

Related Achievements / Trophies



  • Required Reading: Collect all physical Codex pages in a single save slot.
  • Hypersonic: Complete all Secret Encounters in a single save slot.
  • Lucky Charm Bracelet: Acquire all Support Runes in a single save slot.

UAC Atlantica: Codex Entries



Codex entry #1:



Codex entry #2:



Codex entry #3



Codex entry #4:



UAC Atlantica: Secret Encounters



Secret Encounter #1:



Secret Encounter #2:

You need to press this button before looking for anything



UAC Atlantica: Support Rune



Slayer Key and Gate:



Blood Swamps: Codex Entries



Codex entry #1:



Codex entry #2:



Codex entry #3:



There is a hole under the water, jump in.



Codex entry #4:



Blood Swamps: Secret Encounters



Secret Encounter #1:



Climb up to the top, there will be a hole there that you need to jump down to.



Secret Encounter #2:



Blood Swamps: Support Rune



Support Rune:



The Holt: Codex Entries



Codex entry #1:



Codex entry #2:



Codex entry #3:



Codex entry #4:



Note: To unlock the door to the room with the codex entry, you have to do the platforming section first, turn around, and shoot a button in front of you.



Codex entry #5:



The Holt: Secret Encounters



Secret Encounter #1:



Secret Encounter #2:



The Holt: Support Rune



Slayer Gate and Key:



Thanks for checking out this guide!

Written by Ming.


Game:   DOOM Eternal