Games like That Which Remains
Games like That Which Remains include Phasmophobia, Lethal Company, Pacify, The Outlast Trials, and Backrooms: Escape Together. We matched them by the tags players give That Which Remains on Steam (Psychological Horror, Investigation, Realistic, Resource Management, and Immersive Sim): closest matches first, and among equally close ones the better-known games.

Phasmophobia
Shared: Psychological Horror · Horror · Investigation

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

Pacify
Shared: Psychological Horror · Horror · First-Person

The Outlast Trials
Shared: Psychological Horror · Horror · PvE

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

Escape the Backrooms
Shared: Psychological Horror · Horror · First-Person

Ready or Not
Shared: Realistic · Psychological Horror · First-Person

Zort
Shared: Psychological Horror · Horror · PvE

The Forest
Shared: Crafting · Horror · First-Person

The Escape: Together
Shared: Immersive Sim · Realistic · Horror

Demonologist
Shared: Psychological Horror · Investigation · Horror

Conrad Stevenson's Paranormal P.I.
Shared: Psychological Horror · Investigation · Horror

Nuclear Nightmare
Shared: Psychological Horror · Horror · First-Person

The Complex: Expedition
Shared: Realistic · Psychological Horror · Horror

Bodycam
Shared: Realistic · First-Person · Horror

Ghost Exorcism INC.
Shared: Investigation · Psychological Horror · Horror

Subliminal
Shared: Psychological Horror · Realistic · First-Person

Liftoff®: FPV Drone Racing
Shared: Realistic · First-Person · Immersive Sim

Squad
Shared: Realistic · PvE · First-Person

Inside the Backrooms
Shared: Psychological Horror · Horror · First-Person

Species: Unknown
Shared: Horror · First-Person · PvE

Ghost Janitors
Shared: Psychological Horror · Horror · Realistic

Amnesia: The Bunker
Shared: Immersive Sim · Horror · First-Person

The Exit 8
Shared: Psychological Horror · Immersive Sim · Exploration