Games like SEVERANCE
Games like SEVERANCE include Phasmophobia, Pacify, PEAK, Escape the Backrooms, and R.E.P.O.. We matched them by the tags players give SEVERANCE on Steam (Horror, Online Co-Op, Character Customization, 3D, and Detective): closest matches first, and among equally close ones the better-known games.

Phasmophobia
Shared: Horror · Online Co-Op · Detective

Pacify
Shared: Horror · Online Co-Op · PvP

PEAK
Shared: Online Co-Op · 3D · Co-op

Escape the Backrooms
Shared: Horror · Online Co-Op · 3D

R.E.P.O.
Shared: Horror · Online Co-Op · 3D

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

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

BIGFOOT
Shared: Horror · Online Co-Op · PvP

Demonologist
Shared: Horror · Online Co-Op · Detective

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

Ghost Exorcism INC.
Shared: Horror · Investigation · Detective

The Outlast Trials
Shared: Horror · Character Customization · Action

Liars Bar
Shared: PvP · Online Co-Op · 3D

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

Boo Men
Shared: Horror · Online Co-Op · Action

Labyrinthine
Shared: Horror · Online Co-Op · Character Customization

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

Zort
Shared: Horror · Online Co-Op · Action

Shift At Midnight
Shared: Horror · Online Co-Op · 3D

DEVOUR
Shared: Horror · Online Co-Op · Dark

Buckshot Roulette
Shared: Horror · Dark · 3D

PUBG: BATTLEGROUNDS
Shared: PvP · Online Co-Op · Action

The Headliners
Shared: Horror · Online Co-Op · Action

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