Chapter 9: Lazarus Labs
Collectible 17 – Once you pass the second Elite Guard in this chapter, make your way to the next room and locate the hallway on the left. You’ll need to go pass the artifacts, it’s a hidden passageway.
Collectible 18 – When you reach the Lazarus Archives (the story will bring you here eventually), climb the right side to the second level. Follow the red markers and interact wit the archives.
Chapter 10: Titan’s Realm
Collectible 19 – Make your way to the first portal, then go through it. Once through, head to your right and make your way up to the second floor. You’ll find a hole in the wall to your left where you’ll locate this Doom collectible.
Collectible 20 – Now continue on to the second portal and go through it. There’s a jump pad that will take you to a higher floor where you’ll notice a ledge to your right that you can reach. This item, a Cyberdemon Model, can be found there.
Chapter 11: The Necropolis
Collectible 21 – Proceed through the chapter and you’ll encounter two Cacodemons guarding three platforms. Take them out and make your way across. Then reach the lower pathway where you’ll find this collectible.
Collectible 22 – When you come across the Icon of Sin all you have to do is shoot it with a rocket to get this collectible.
Chapter 12: VEGA Central Processing
Collectible 23 – When the chapter begins, go into the building and then look to your right. It will be on the edge of a vent.
Collectible 24 – You’ll need the Blue Keycard to enter Sector P. When you’re in there, you’ll find another door that requires it. Enter and then locate the hole in the floor on the left. Follow the path to another drop, then continue on to find this one.
Chapter 13: Argent D’Nur
Collectible 25 – There will be several areas where you deal with Wraiths. Clear the area around the second Wraith then work your way up the stairs. There will be a hole to the side that you can duck into.
Collectible 26 – The Spider Mastermind Model is actually automatically obtained when you defeat the monster by the same name late in the chapter.
There you have it, all of the Doom collectibles. For more on Doom, including guides, tips, tricks, and information, be sure to check out our wiki.
