Games like Geocore
Games like Geocore include Backrooms: Escape Together, PEAK, The Outlast Trials, Grand Theft Auto V Legacy, and R.E.P.O.. We matched them by the tags players give Geocore on Steam (Indie, Early Access, Action, 6DOF, and Multiplayer): closest matches first, and among equally close ones the better-known games.
Backrooms: Escape Together
Shared: Multiplayer · Early Access · Horror
PEAK
Shared: Multiplayer · First-Person · Co-op
The Outlast Trials
Shared: Multiplayer · First-Person · Horror
Grand Theft Auto V Legacy
Shared: Action · Multiplayer · First-Person
R.E.P.O.
Shared: Multiplayer · Horror · First-Person
Call of Duty®: Black Ops III
Shared: Multiplayer · Action · First-Person
Content Warning
Shared: Multiplayer · Procedural Generation · Horror
Halo: The Master Chief Collection
Shared: Great Soundtrack · Multiplayer · First-Person
Lethal Company
Shared: First-Person · Horror · Indie
Phasmophobia
Shared: Multiplayer · Horror · First-Person
Interstellar Marines
Shared: Indie · Action · Multiplayer
DOOM
Shared: Action · Great Soundtrack · Multiplayer
Escape the Backrooms
Shared: Multiplayer · Horror · First-Person
Storm Chasers
Shared: Early Access · Indie · Action
Outlast
Shared: First-Person · Horror · Multiplayer
PAYDAY 2
Shared: Action · Multiplayer · Co-op
Subnautica 2
Shared: Multiplayer · Horror · Early Access
Pacify
Shared: Multiplayer · Horror · First-Person
Ready or Not
Shared: Multiplayer · Action · First-Person
The Blackout Club
Shared: Indie · Action · Multiplayer
Sons Of The Forest
Shared: Multiplayer · Indie · First-Person
How to Fish
Shared: Indie · Multiplayer · First-Person