Games like Greenhouse
Games like Greenhouse include SOMA, Inside the Backrooms, Lethal Company, Amnesia: A Machine For Pigs, and What Remains of Edith Finch. We matched them by the tags players give Greenhouse on Steam (Horror, Psychological Horror, Walking Simulator, Exploration, and Atmospheric): closest matches first, and among equally close ones the better-known games.

SOMA
Shared: Horror · Psychological Horror · Atmospheric

Inside the Backrooms
Shared: Horror · Psychological Horror · Survival Horror

Lethal Company
Shared: Horror · Psychological Horror · Survival Horror

Amnesia: A Machine For Pigs
Shared: Horror · Walking Simulator · Psychological Horror

What Remains of Edith Finch
Shared: Walking Simulator · Atmospheric · Exploration

Poppy Playtime
Shared: Horror · Psychological Horror · Survival Horror

Layers of Fear (2016)
Shared: Horror · Psychological Horror · Walking Simulator

Escape the Backrooms
Shared: Horror · Psychological Horror · Survival Horror

Firewatch
Shared: Walking Simulator · Atmospheric · Adventure

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

Outlast
Shared: Horror · Psychological Horror · Atmospheric

POOLS
Shared: Psychological Horror · Walking Simulator · Atmospheric

Amnesia: The Dark Descent
Shared: Horror · Psychological Horror · Atmospheric

Visage
Shared: Horror · Psychological Horror · Survival Horror

The Exit 8
Shared: Horror · Exploration · Walking Simulator

SILENT HILL 2
Shared: Horror · Psychological Horror · Atmospheric

Darkwood
Shared: Horror · Psychological Horror · Survival Horror

Outer Wilds
Shared: Exploration · Mystery · Atmospheric

DON'T SCREAM
Shared: Horror · Psychological Horror · Walking Simulator

Garten of Banban
Shared: Horror · Psychological Horror · Survival Horror

Resident Evil 7 Biohazard
Shared: Horror · Survival Horror · Psychological Horror

Kholat
Shared: Horror · Walking Simulator · Psychological Horror

INFRA
Shared: Exploration · Walking Simulator · Atmospheric

Dread Flats
Shared: Horror · Psychological Horror · Adventure