Games like Scorn
Games like Scorn include Amnesia: The Dark Descent, Outlast 2, Outlast, Clive Barker's Hellraiser: Revival, and SOMA. We matched them by the tags players give Scorn on Steam (Gore, Horror, Atmospheric, Sexual Content, and Puzzle): closest matches first, and among equally close ones the better-known games.

Amnesia: The Dark Descent
Shared: Gore · Horror · Atmospheric

Outlast 2
Shared: Horror · Gore · First-Person

Outlast
Shared: Horror · Atmospheric · Gore

Clive Barker's Hellraiser: Revival
Shared: Gore · Sexual Content · Horror

SOMA
Shared: Horror · Atmospheric · Gore

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

Resident Evil 7 Biohazard
Shared: Horror · Gore · First-Person

Poppy Playtime
Shared: Horror · Puzzle · First-Person

Still Wakes the Deep
Shared: Horror · Gore · First-Person

DEVOUR
Shared: Horror · Sexual Content · Dark

ParanormalHK
Shared: Horror · Sexual Content · Nudity

MiSide
Shared: Horror · Sexual Content · Psychological Horror

Little Nightmares II
Shared: Horror · Puzzle · Atmospheric

Little Nightmares
Shared: Horror · Atmospheric · Puzzle

Layers of Fear (2016)
Shared: Horror · Atmospheric · First-Person

Mouthwashing
Shared: Horror · Atmospheric · Gore

Lucius
Shared: Horror · Gore · Puzzle

Buckshot Roulette
Shared: Horror · Dark · First-Person

MADiSON
Shared: Horror · Atmospheric · Dark

Fran Bow
Shared: Horror · Puzzle · Psychological Horror

White Day: A Labyrinth Named School
Shared: Horror · Sexual Content · First-Person

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

Garten of Banban
Shared: Horror · First-Person · Puzzle

Dead by Daylight
Shared: Horror · Gore · First-Person