Games like C.I.E.B The Backrooms
Games like C.I.E.B The Backrooms include Lethal Company, Baldi's Basics Plus, The Exit 8, Firewatch, and PEAK. We matched them by the tags players give C.I.E.B The Backrooms on Steam (Exploration, PvE, Walking Simulator, Roguelike, and 3D): closest matches first, and among equally close ones the better-known games.

Lethal Company
Shared: Exploration · First-Person · Horror

Baldi's Basics Plus
Shared: Roguelike · Horror · Exploration

The Exit 8
Shared: Exploration · Walking Simulator · Horror

Firewatch
Shared: Walking Simulator · Exploration · First-Person

PEAK
Shared: Exploration · First-Person · 3D

PILGRIM
Shared: Exploration · PvE · Horror

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

Scanner Sombre
Shared: Exploration · Walking Simulator · Horror

Five Nights at Freddy's: Security Breach
Shared: Horror · Exploration · First-Person

Buckshot Roulette
Shared: First-Person · Horror · 3D

Still Wakes the Deep
Shared: Horror · Walking Simulator · First-Person

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

VERGE:Lost chapter
Shared: Walking Simulator · Horror · PvE

Deep Rock Galactic
Shared: PvE · Exploration · Procedural Generation

Content Warning
Shared: Exploration · Horror · Procedural Generation

KLETKA
Shared: PvE · Horror · First-Person

Dreamcore
Shared: Exploration · Walking Simulator · First-Person

Subnautica
Shared: Exploration · Horror · First-Person

September 7th
Shared: Exploration · Walking Simulator · Horror

Amnesia: A Machine For Pigs
Shared: Walking Simulator · Exploration · Horror

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

A Game About Digging A Hole
Shared: Exploration · Horror · Procedural Generation

SOMA
Shared: Horror · Exploration · First-Person

Five Nights at Freddy's: Secret of the Mimic
Shared: First-Person · Exploration · Horror