Games like Sinister Night
Games like Sinister Night include Phasmophobia, Escape the Backrooms, Dead by Daylight, Pacify, and Backrooms: Escape Together. We matched them by the tags players give Sinister Night on Steam (Horror, Multiplayer, Social Deduction, Supernatural, and Psychological Horror): closest matches first, and among equally close ones the better-known games.

Phasmophobia
Shared: Horror · Multiplayer · Psychological Horror

Escape the Backrooms
Shared: Horror · Multiplayer · Psychological Horror

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

Pacify
Shared: Horror · Multiplayer · Online Co-Op

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

Inside the Backrooms
Shared: Horror · Multiplayer · Psychological Horror

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

Subnautica 2
Shared: Multiplayer · Horror · Survival

DEVOUR
Shared: Horror · Multiplayer · Online Co-Op

The Outlast Trials
Shared: Horror · Multiplayer · Psychological Horror

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

Sons Of The Forest
Shared: Multiplayer · Horror · Survival

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

PEAK
Shared: Multiplayer · Online Co-Op · Adventure

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

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

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

Outlast
Shared: Horror · Psychological Horror · Multiplayer

BIGFOOT
Shared: Horror · Multiplayer · Online Co-Op

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

Demonologist
Shared: Horror · Multiplayer · Psychological Horror

PANICORE
Shared: Horror · Multiplayer · Psychological Horror

Labyrinthine
Shared: Horror · Multiplayer · Online Co-Op

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