Games like Amnesia: The Dark Descent
Games like Amnesia: The Dark Descent include Outlast, SOMA, Outlast 2, Resident Evil 7 Biohazard, and Poppy Playtime. We matched them by the tags players give Amnesia: The Dark Descent on Steam (Horror, Gore, Psychological Horror, Survival Horror, and Atmospheric): closest matches first, and among equally close ones the better-known games.

Outlast
Shared: Horror · Survival Horror · Psychological Horror

SOMA
Shared: Horror · Psychological Horror · Atmospheric

Outlast 2
Shared: Horror · Psychological Horror · Survival Horror

Resident Evil 7 Biohazard
Shared: Horror · Survival Horror · Gore

Poppy Playtime
Shared: Horror · Survival Horror · Puzzle

Scorn
Shared: Horror · Gore · Atmospheric

Resident Evil Village
Shared: Horror · Survival Horror · First-Person

Still Wakes the Deep
Shared: Horror · Gore · Psychological Horror

Little Nightmares
Shared: Horror · Atmospheric · Puzzle

Little Nightmares II
Shared: Horror · Puzzle · Psychological Horror

Dead by Daylight
Shared: Horror · Gore · Survival Horror

Inside the Backrooms
Shared: Horror · Survival Horror · Psychological Horror

Clive Barker's Hellraiser: Revival
Shared: Gore · Horror · Atmospheric

Lethal Company
Shared: Horror · Survival Horror · First-Person

MADiSON
Shared: Horror · Psychological Horror · Survival Horror

The Evil Within 2
Shared: Horror · Psychological Horror · Survival Horror

Penumbra Overture
Shared: Horror · Survival Horror · Psychological Horror

Resident Evil 2
Shared: Horror · Survival Horror · Gore

Bendy and the Ink Machine
Shared: Horror · First-Person · Puzzle

The Outlast Trials
Shared: Horror · Survival Horror · Psychological Horror

Layers of Fear (2016)
Shared: Horror · Psychological Horror · Atmospheric

DEVOUR
Shared: Horror · Survival Horror · Psychological Horror

The Beast Inside
Shared: Horror · Survival Horror · First-Person

Penumbra: Black Plague Gold Edition
Shared: Horror · Psychological Horror · First-Person