This Doom Eternal: The Ancient Gods Codex Pages Guide will show you where you can find all the Codex Pages in the game. These are collectibles like the Secret Encounters and Runes that you need to collect to help you reach 100% of the DLC.
There are three different levels in The Ancient Gods DLC of Doom Eternal. Each contains a handful of Codex Pages hidden in the various areas in the level. This guide will detail how to get to each location and get the Codex Pages.
Doom Eternal: The Ancient Gods Codex Pages Guide
Below we have detailed all the Codex Pages locations in the game.
UAC Atlantica Facility
This level contains 4 Codex Pages:
Codex #1
Right at the beginning of this level, you will find the Codex when you enter the Facility and then take the Blue Keycard. Now head down the stairs and enter the locked door. The Codex will be in front, just before you take the stairs that lead up
Codex #2
In the level when you encounter turret enemies and Cyber Mancubus, jump ahead and interact with the button behind the enemies. Now go to the left and take the stairs that lead up to the Codex.
Codex #3
The third Codex in this level is in the area where you need to swing and use the fan to reach the platform up ahead. You will notice a ledge that you need to climb and take the codex from the end of this path.
Codex #4
After you return to the facility and talk to the Intern again, you need to turn around and go towards the stairs. The Codex will be behind the stairs.
The Blood Swamps
There are 4 Codex in this level:
Codex #1
This Codex can be found in the foggy swamp area after the Marauder area. You need to head down towards the swamp, jump and double dash towards the water. When you dive underwater, turn around and you will find the red glowing Codex behind you.
Codex #2
When you encounter the Whiplash enemies, head to the right where you will find water. Dive underwater and you will find the Codex at the end of this path.
Codex #3
The third Codex in this level will be in the area with the rotating poles. You need to jump at the ledge where you will find the Pain Elemental and then leap towards the tower in the distance.
Codex #4
In the area where you have to stay put with the spirit dog, you need to complete this task and then unlock the chamber that takes you to the swamp. You will find a pillar here that you can jump to, and then to the wall that you can grab and climb.
The Holt
There are 5 Codex in this level:
Codex #1
When you get the Resurrect the Dark Lord objective and when you are making your way through the red roots, you will come across a path just before the large spiny structure ahead. From the edge, look down and jump the platform below to get the Codex
Codex #2
After the area with a lot of round pillars, and just before the main circular tower ahead, you will get to a point where the Father will talk to you about resealing the Void. This area will have a few pillar platforms next to the main path. Go to the far right pillar where the red Codex is.
Codex #3
On your way to the Luminarium and just before the objective, you will find the red Codex to the left after you enter the door.
This guide is a work in progress, the remaining Codex locations will be added soon.
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