Doom Eternal Collectibles Guide: Mars Core Secrets Locations

Last Update: March 26, 2020 8:34 PM /


Doom Eternal

The seventh level of Doom Eternal, Mars Core, features 20 total collectibles to find. You'll be going back to Mars to rip and tear more demons and maybe, just maybe, get your hands on a very large gun. In total, you'll find:

  • Codex Pages
  • 3 Toys
  • 1 Cheat Code
  • 1 Empyrean Key
  • 2 Albums
  • 2 Runes
  • 3 Sentinel Batteries
  • 5 Praetor Suit Tokens
  • Sentinel Crystal

All Collectibles in Doom Eternal Mars Core



The Rune can be found in the hallway shorty after taking the mini-portal.

Sentinel Battery


After clearing out the bridges, follow the objective marker and drop down. Then turn around and make your way across the platforms to get the Sentinel Battery.

Praetor Suit Token


There will be a room with four piston-like things. Use the pistons to get to the top of the room, then look for a platform with the Praetor Suit Token.

Codex Entry: BFG 10000


After you get out of the piston room, go left for Codex Entry: BFG 10000.

Praetor Suit Token


Shortly after you get the BFG 9000, clear out the next major combat area. Follow the objective marker until you drop down. Punch through the wall on the left, then jump off the cliff and make a twist jump to the right in order to get the Praetor Suit Token.

Prowler Toy


After taking the elevator, you'll end up in a control room where you have to use the terminal on the left to progress. Instead, go right after leaving the elevator to get the Prowler Toy.



The Rune can be found in the hallway after using the ion catapult terminal.

Praetor Suit Token


When you enter the tentacle room, go left and jump up the boxes to get the Praetor Suit Token.

Cheat Code: Powerup Mode - Onslaught


Enter the tentacle room and go right for Cheat Code: Powerup Mode - Onslaught.

Album: DOOM 64 - Intro


After getting the Praetor Token, use the jump pad. Once you land, turn around and use the monkey bar to get across the room and the Album: DOOM 64 - Intro.

Carcass Toy


After using the portal, take the jump pad and keep going forward. The Carcass Toy will be in the right corner of the room.

Praetor Suit Token


In the floating rocks area with barrels, the Praetor Suit Token will be on the right set of rocks. 

Sentinel Battery


At the end of the floating rocks area, there will be a final jump pad that launches you to the next area. However, to get the Sentinel Battery, you need to turn around and dash the moment that you touch the pad so that you land on the upper platform behind you. 

Sentinel Crystal


After taking the jump pad, the Sentinel Crystal will be in front of you. 

Empyrean Key


In the second tentacle room, there will be a security room to the left of the entrance. There is a button that you can press that raises a pillar in front of you. Use the pillar to jump into a vent. The Slayer Gate will be on the left after you get the Slayer Key, complete that gate to get the Empyrean Key.

Album: Quake Champions - Goroth


Using the same pillar you used to get the Key, jump to the left vent to get the Album: Quake Champions - Goroth . 

Pinky Toy


Leave the tentacle room by dropping through a hole in the floor, then immediately turn left. Go through the grate, then take the jump pad to a secret room for the Pinky Toy.

Sentinel Battery


After taking the escape pod, the Sentinel Battery will be right in front of you. 

Codex Entry: The Lost City of Hebeth


A short distance away from the Battery, to the right of the archway will be Codex Entry: The Lost City of Hebeth

Praetor Suit Token


Enter the archway then go all the way to the left for the Praetor Suit Token.

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More Info About This Game
Learn More About Doom Eternal
Game Page Doom Eternal
Id Software
Bethesda Softworks
Release Date
March 20, 2020 (Calendar)
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