TL;DR: Doom The Dark Ages might be a blast on PC and consoles, but on Steam Deck it’s straight-up “nightmare” territory. Even with XeSS Quality set to low and resolution cranked down to 1280×720 (and later 960×540), SteamDeckHQ could barely eke out 30 FPS in open areas—and those dips into the mid-20s make everything blurry, pixelated and generally unplayable.
If you’re eyeing the Deck as your go-to, steer clear—for now at least. Patches might improve performance down the line, but there’s no guarantee. If you want demon-slaying glory without constant frame-rate faceplants, stick to PC, PS5 or Xbox Series X/S.
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