Doom Eternal – Fortress of Doom Collectibles
A guide on the location of the Sentinel Crystal and codices at the Fortress of Doom in Doom Eternal.
Fortress of Doom
Doom Eternal – Empyrean Keys
A guide on the location of the six Empyrean Keys found throughout Doom Eternal. The keys are used to activate the Maykr Device in the Fortress of Doom, which unlocks the Unmayker.