Games like The Backrooms - Nightmare Dimension
Games like The Backrooms - Nightmare Dimension include Phasmophobia, Pacify, Escape the Backrooms, Dead by Daylight, and Demonologist. We matched them by the tags players give The Backrooms - Nightmare Dimension on Steam (Horror, Online Co-Op, Multiplayer, Psychological Horror, and Survival Horror): closest matches first, and among equally close ones the better-known games.

Phasmophobia
Shared: Horror · Online Co-Op · Multiplayer

Pacify
Shared: Horror · Online Co-Op · Multiplayer

Escape the Backrooms
Shared: Horror · Online Co-Op · Multiplayer

Dead by Daylight
Shared: Horror · Multiplayer · Online Co-Op

Demonologist
Shared: Horror · Online Co-Op · Multiplayer

DEVOUR
Shared: Horror · Online Co-Op · Multiplayer

Left 4 Dead 2
Shared: Multiplayer · Co-op · Online Co-Op

Lethal Company
Shared: Horror · Online Co-Op · Co-op

Inside the Backrooms
Shared: Horror · Multiplayer · Psychological Horror

Backrooms: Escape Together
Shared: Horror · Multiplayer · Online Co-Op

The Outlast Trials
Shared: Horror · Multiplayer · Co-op

R.E.P.O.
Shared: Horror · Online Co-Op · Multiplayer

GTFO
Shared: Horror · Online Co-Op · Co-op

Lunch Lady
Shared: Horror · Online Co-Op · Multiplayer

BIGFOOT
Shared: Horror · Multiplayer · Online Co-Op

Nuclear Nightmare
Shared: Online Co-Op · Horror · Survival Horror

Shift At Midnight
Shared: Horror · Online Co-Op · Multiplayer

Content Warning
Shared: Horror · Online Co-Op · Multiplayer

Ready or Not
Shared: Multiplayer · Horror · Shooter

In Silence
Shared: Horror · Online Co-Op · Multiplayer

How to Fish
Shared: Online Co-Op · Multiplayer · Co-op

Dying Light
Shared: Horror · Online Co-Op · Survival Horror

PANICORE
Shared: Horror · Online Co-Op · Psychological Horror

Labyrinthine
Shared: Horror · Online Co-Op · Multiplayer