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

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

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

Pacify
Shared: Horror · Online Co-Op · Multiplayer

Demonologist
Shared: Horror · Online Co-Op · Multiplayer

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

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

Inside the Backrooms
Shared: Horror · Multiplayer · Psychological Horror

PEAK
Shared: Online Co-Op · Multiplayer · Co-op

DEVOUR
Shared: Horror · Online Co-Op · Multiplayer

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

The Outlast Trials
Shared: Horror · Multiplayer · Psychological Horror

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

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

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

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

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

Subnautica 2
Shared: Horror · Multiplayer · Co-op

Dying Light
Shared: Horror · Online Co-Op · First-Person

RV There Yet?
Shared: Multiplayer · Online Co-Op · Co-op

Outlast
Shared: Horror · Psychological Horror · First-Person

Buckshot Roulette
Shared: Horror · Multiplayer · Dark

We Were Here
Shared: Co-op · Horror · Multiplayer

Labyrinthine
Shared: Horror · Online Co-Op · Multiplayer

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