Games like Black Fog
Games like Black Fog include SOMA, Outlast, Lethal Company, Outlast 2, and Mouthwashing. We matched them by the tags players give Black Fog on Steam (Casual, Exploration, Hidden Object, 3D, and First-Person): closest matches first, and among equally close ones the better-known games.

SOMA
Shared: Atmospheric · Horror · Exploration

Outlast
Shared: First-Person · Horror · Atmospheric

Lethal Company
Shared: First-Person · Exploration · Horror

Outlast 2
Shared: First-Person · Horror · Psychological Horror

Mouthwashing
Shared: Atmospheric · Horror · Psychological Horror

Escape the Backrooms
Shared: Horror · Exploration · First-Person

Amnesia: The Dark Descent
Shared: Horror · Atmospheric · First-Person

Inside the Backrooms
Shared: Horror · Exploration · Psychological Horror

Backrooms: Escape Together
Shared: Horror · Atmospheric · First-Person

What Remains of Edith Finch
Shared: Exploration · Atmospheric · First-Person

Pacify
Shared: Exploration · Horror · First-Person

Resident Evil 7 Biohazard
Shared: First-Person · Horror · Atmospheric

MiSide
Shared: First-Person · Psychological Horror · 3D

No, I'm not a Human
Shared: Horror · Psychological Horror · Atmospheric

Still Wakes the Deep
Shared: Horror · First-Person · Psychological Horror

Poppy Playtime
Shared: Horror · First-Person · Dark

Visage
Shared: Horror · First-Person · Dark

Garten of Banban
Shared: First-Person · Horror · 3D

Layers of Fear (2016)
Shared: Atmospheric · Horror · First-Person

Five Nights at Freddy's: Security Breach
Shared: Horror · First-Person · Exploration

Buckshot Roulette
Shared: Dark · First-Person · Horror

Amnesia: A Machine For Pigs
Shared: Exploration · Horror · First-Person

Slender: The Arrival
Shared: First-Person · Horror · Dark

Resident Evil Village
Shared: First-Person · Horror · Survival Horror