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

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

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

Pacify
Shared: Horror · Online Co-Op · Multiplayer

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

Phasmophobia
Shared: Horror · Online Co-Op · Multiplayer

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

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

Outlast
Shared: Horror · Survival Horror · First-Person

Inside the Backrooms
Shared: Horror · Multiplayer · Survival Horror

DEVOUR
Shared: Horror · Online Co-Op · Multiplayer

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

The Outlast Trials
Shared: Horror · Multiplayer · Survival Horror

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

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

Resident Evil Village
Shared: Horror · Survival Horror · Action

Blood and Bacon
Shared: Multiplayer · Action · Horror

Resident Evil Requiem
Shared: Horror · Survival Horror · Action

BIGFOOT
Shared: Horror · Multiplayer · Online Co-Op

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

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

Dark Deception
Shared: Horror · Multiplayer · Singleplayer

Ready or Not
Shared: Multiplayer · Horror · Singleplayer

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

Outlast 2
Shared: Horror · Survival Horror · Psychological Horror