Games like Transliminal: Beyond The Backrooms
Games like Transliminal: Beyond The Backrooms include Lethal Company, Darkwood, The Forest, SILENT HILL 2, and SOMA. We matched them by the tags players give Transliminal: Beyond The Backrooms on Steam (Exploration, Horror, Adventure, Psychological Horror, and Mystery Dungeon): closest matches first, and among equally close ones the better-known games.

Lethal Company
Shared: Horror · Exploration · Psychological Horror

Darkwood
Shared: Horror · Adventure · Psychological Horror

The Forest
Shared: Horror · Adventure · Exploration

SILENT HILL 2
Shared: Horror · Psychological Horror · Atmospheric

SOMA
Shared: Horror · Psychological Horror · Exploration

DREDGE
Shared: Exploration · Adventure · Psychological Horror

Outlast
Shared: Horror · Psychological Horror · Atmospheric

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

Subnautica 2
Shared: Horror · Exploration · Adventure

Escape the Backrooms
Shared: Horror · Psychological Horror · Exploration

Firewatch
Shared: Adventure · Atmospheric · Exploration

Fallout 4
Shared: Exploration · Adventure · Singleplayer

Visage
Shared: Horror · Psychological Horror · Adventure

The Classrooms
Shared: Exploration · Psychological Horror · Surreal

SILENT HILL f
Shared: Horror · Psychological Horror · Adventure

Poppy Playtime
Shared: Horror · Psychological Horror · Singleplayer

The Beast Inside
Shared: Horror · Adventure · Psychological Horror

Layers of Fear (2016)
Shared: Horror · Psychological Horror · Atmospheric

Content Warning
Shared: Horror · Exploration · Procedural Generation

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

Mouthwashing
Shared: Horror · Psychological Horror · Atmospheric

Outer Wilds
Shared: Exploration · Adventure · Atmospheric

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

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