Secret encounter

Secret encounters are special optional challenges that exist in the main campaign of Doom Eternal and in the first expansion, The Ancient Gods, Part One. They are timed encounters that begin when the Doom Slayer activates a special gore nest. All of the demons that spawn must be defeated within the time limit in order to clear the encounter; otherwise, the gore nest will reset and no award will be received. Once defeated, the gore nest explodes and cannot be re-activated, and will no longer normally spawn when replaying the level from the mission select menu. Secret encounters in the main campaign award additional combat points for spending on weapon upgrades, and accordingly, each has a pip on the level's corruption meter. In The Ancient Gods, cosmetic Slayer skins are unlocked by defeating both of the secret encounters in a level.

Main campaign

 * Exultia
 * Cultist Base
 * Super Gore Nest
 * ARC Complex
 * Mars Core
 * Taras Nabad
 * Nekravol
 * Nekravol - Part II
 * Urdak

The Ancient Gods, Part One

 * UAC Atlantica Facility
 * The Blood Swamps
 * The Holt