Games like Desecration
Games like Desecration include Poppy Playtime, Outlast, SOMA, Darkwood, and Outlast 2. We matched them by the tags players give Desecration on Steam (Psychological Horror, Underground, 1990's, Horror, and Adventure): closest matches first, and among equally close ones the better-known games.

Poppy Playtime
Shared: Horror · Psychological Horror · Singleplayer

Outlast
Shared: Horror · Psychological Horror · Survival Horror

SOMA
Shared: Psychological Horror · Horror · Survival Horror

Darkwood
Shared: Psychological Horror · Horror · Adventure

Outlast 2
Shared: Psychological Horror · Horror · Survival Horror

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

Visage
Shared: Psychological Horror · Horror · Survival Horror

Little Nightmares
Shared: Horror · Adventure · Singleplayer

Little Nightmares II
Shared: Horror · Adventure · Psychological Horror

Sally Face - Episode One
Shared: Psychological Horror · Horror · Adventure

Five Nights at Freddy's
Shared: Horror · Psychological Horror · Survival Horror

Amnesia: The Dark Descent
Shared: Psychological Horror · Horror · Survival Horror

Crow Country
Shared: 1990's · Survival Horror · Horror

SILENT HILL 2
Shared: Psychological Horror · Horror · Survival Horror

Bad Parenting 1: Mr. Red Face
Shared: Psychological Horror · Horror · Adventure

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

Mouthwashing
Shared: Psychological Horror · Horror · Dark

Five Nights at Freddy's 2
Shared: Horror · Psychological Horror · Survival Horror

No, I'm not a Human
Shared: Psychological Horror · Horror · Singleplayer

Slender: The Arrival
Shared: Horror · Survival Horror · Psychological Horror

Lethal Company
Shared: Horror · Psychological Horror · Survival Horror

Five Nights at Freddy's: Security Breach
Shared: Horror · Survival Horror · Singleplayer

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

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