Games like The Backrooms: Liminal Space
Games like The Backrooms: Liminal Space include SILENT HILL: Townfall, Wavetale, Hello Neighbor, Kena: Bridge of Spirits, and Five Nights at Freddy's: Secret of the Mimic. We matched them by the tags players give The Backrooms: Liminal Space on Steam (Adventure, Action-Adventure, 3D Platformer, 3D, and Cinematic): closest matches first, and among equally close ones the better-known games.

SILENT HILL: Townfall
Shared: Adventure · Action-Adventure · First-Person

Wavetale
Shared: Adventure · Action-Adventure · 3D Platformer

Hello Neighbor
Shared: First-Person · Action-Adventure · 3D Platformer

Kena: Bridge of Spirits
Shared: Adventure · Action-Adventure · 3D Platformer

Five Nights at Freddy's: Secret of the Mimic
Shared: Adventure · First-Person · 3D

Resident Evil Requiem
Shared: Action-Adventure · First-Person · Horror

A Plague Tale: Requiem
Shared: Adventure · Action-Adventure · Cinematic

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

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

Amanda the Adventurer
Shared: First-Person · Adventure · 1990's

Bramble: The Mountain King
Shared: Adventure · Cinematic · 3D

MiSide
Shared: First-Person · 3D · Horror

God of War Ragnarök
Shared: Adventure · Action-Adventure · Cinematic

Sonic Frontiers
Shared: Adventure · 3D Platformer · Action-Adventure

MOLE
Shared: Adventure · First-Person · Horror

Choo-Choo Charles
Shared: First-Person · Action-Adventure · 3D

Poppy Playtime
Shared: First-Person · Horror · Adventure

Amnesia: Rebirth
Shared: Action-Adventure · First-Person · Adventure

Viewfinder
Shared: First-Person · Adventure · Action-Adventure

Hello Neighbor 2
Shared: Adventure · Action-Adventure · First-Person

Indiana Jones and the Great Circle
Shared: Action-Adventure · Adventure · First-Person

Firewatch
Shared: Adventure · First-Person · Atmospheric

Little Nightmares II
Shared: Adventure · Horror · Action-Adventure

PEAK
Shared: Adventure · First-Person · 3D