Games like Purgatory Salvation
Games like Purgatory Salvation include Escape the Backrooms, Phasmophobia, Demonologist, Backrooms: Escape Together, and Inside the Backrooms. We matched them by the tags players give Purgatory Salvation on Steam (Horror, Psychological Horror, Adventure, Surreal, and Multiplayer): closest matches first, and among equally close ones the better-known games.

Escape the Backrooms
Shared: Horror · Psychological Horror · Multiplayer

Phasmophobia
Shared: Horror · Psychological Horror · Multiplayer

Demonologist
Shared: Horror · Psychological Horror · Multiplayer

Backrooms: Escape Together
Shared: Horror · Psychological Horror · Multiplayer

Inside the Backrooms
Shared: Horror · Psychological Horror · Multiplayer

Pacify
Shared: Horror · Psychological Horror · Multiplayer

The Outlast Trials
Shared: Horror · Psychological Horror · Multiplayer

PEAK
Shared: Multiplayer · Adventure · First-Person

Dead by Daylight
Shared: Horror · Multiplayer · Psychological Horror

Outlast
Shared: Horror · Psychological Horror · First-Person

Zort
Shared: Horror · Psychological Horror · First-Person

Subnautica 2
Shared: Horror · Multiplayer · Adventure

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

Fears to Fathom® - Scratch Creek
Shared: Horror · Psychological Horror · Adventure

Buckshot Roulette
Shared: Horror · Multiplayer · First-Person

Gorilla Tag
Shared: Psychological Horror · Multiplayer · Horror

We Were Here
Shared: Horror · Multiplayer · Adventure

Poppy Playtime
Shared: Horror · Psychological Horror · First-Person

R.E.P.O.
Shared: Horror · Multiplayer · 3D

The Beast Inside
Shared: Horror · Adventure · Multiplayer

Little Nightmares II
Shared: Horror · Adventure · Psychological Horror

Labyrinthine
Shared: Horror · Psychological Horror · Multiplayer

Ready or Not
Shared: Horror · Multiplayer · Psychological Horror

Content Warning
Shared: Horror · Multiplayer · Psychological Horror