DOOM: The Dark Ages and Horde Mode Is a Match Made in Heaven

id Software will add Slaughter Mode, an endless survival mode, to DOOM: The Dark Ages on 16 November 2026. The free update gives players a new reason to return to the game, though access is limited to owners of the Revelations expansion.

Runs combine randomised enemies, bosses and arenas across 19 locations, with new enemy combinations each round. Players can bank earnings at checkpoints for rewards or risk losing them by continuing; rewards include character and weapon skins, profile icons and music, alongside personal high scores and weekly challenges.