Games like The Backrooms Experiment
Games like The Backrooms Experiment include Escape the Backrooms, Backrooms: Escape Together, PEAK, Visage, and Firewatch. We matched them by the tags players give The Backrooms Experiment on Steam (Adventure, Walking Simulator, 3D, First-Person, and Realistic): closest matches first, and among equally close ones the better-known games.

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

Backrooms: Escape Together
Shared: First-Person · Realistic · Survival Horror

PEAK
Shared: Adventure · First-Person · 3D

Visage
Shared: First-Person · Adventure · Survival Horror

Firewatch
Shared: Adventure · Walking Simulator · First-Person

Fears to Fathom® - Scratch Creek
Shared: Adventure · Walking Simulator · First-Person

POOLS
Shared: Walking Simulator · Realistic · First-Person

Inside the Backrooms
Shared: Adventure · Survival Horror · First-Person

Ready or Not
Shared: Realistic · First-Person · Adventure

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

RV There Yet?
Shared: Adventure · First-Person · 3D

From The Darkness
Shared: First-Person · Walking Simulator · Indie

MiSide
Shared: First-Person · 3D · Psychological Horror

Outlast
Shared: First-Person · Survival Horror · Adventure

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

Phasmophobia
Shared: First-Person · Psychological Horror · Co-op

How to Fish
Shared: Adventure · First-Person · Indie

Slender: The Arrival
Shared: First-Person · Indie · Survival Horror

Welcome to Kowloon
Shared: Adventure · Walking Simulator · First-Person

Five Nights at Freddy's: Security Breach
Shared: First-Person · Adventure · 3D

Subnautica 2
Shared: Adventure · First-Person · Survival Horror

The Cabin Factory
Shared: Walking Simulator · Adventure · First-Person

Layers of Fear (2016)
Shared: Walking Simulator · First-Person · Adventure

What Remains of Edith Finch
Shared: Walking Simulator · Adventure · First-Person