Games like DON'T EXIST
Games like DON'T EXIST include PEAK, Content Warning, Backrooms: Escape Together, Lethal Company, and R.E.P.O.. We matched them by the tags players give DON'T EXIST on Steam (Procedural Generation, Multiplayer, Online Co-Op, Abstract, and Roguelite): closest matches first, and among equally close ones the better-known games.

PEAK
Shared: Multiplayer · Online Co-Op · Procedural Generation

Content Warning
Shared: Procedural Generation · Online Co-Op · Multiplayer

Backrooms: Escape Together
Shared: Multiplayer · Online Co-Op · Procedural Generation

Lethal Company
Shared: Online Co-Op · Exploration · Procedural Generation

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

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

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

Don't Starve Together
Shared: Multiplayer · Survival · Online Co-Op

Subnautica 2
Shared: Multiplayer · Survival · Exploration

Pacify
Shared: Multiplayer · Online Co-Op · Exploration

No Man's Sky
Shared: Multiplayer · Procedural Generation · Survival

Labyrinthine
Shared: Online Co-Op · Multiplayer · Procedural Generation

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

DEVOUR
Shared: Multiplayer · Online Co-Op · Survival

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

Valheim
Shared: Online Co-Op · Multiplayer · Survival

Phasmophobia
Shared: Multiplayer · Online Co-Op · Horror

7 Days to Die
Shared: Multiplayer · Survival · Online Co-Op

Terraria
Shared: Multiplayer · Survival · Exploration

Sons Of The Forest
Shared: Multiplayer · Survival · Exploration

Green Hell
Shared: Multiplayer · Online Co-Op · Survival

Palworld
Shared: Multiplayer · Survival · Online Co-Op

MISERY
Shared: Online Co-Op · Multiplayer · Survival

PANICORE
Shared: Online Co-Op · Multiplayer · Horror