Games like The Oily Depths
Games like The Oily Depths include Iron Lung, Poppy Playtime, Outlast, SOMA, and Outlast 2. We matched them by the tags players give The Oily Depths on Steam (Psychological Horror, Atmospheric, Short, Submarine, and Dark): closest matches first, and among equally close ones the better-known games.

Iron Lung
Shared: Atmospheric · Psychological Horror · Horror

Poppy Playtime
Shared: Horror · Psychological Horror · Dark

Outlast
Shared: Atmospheric · Psychological Horror · Horror

SOMA
Shared: Psychological Horror · Atmospheric · Horror

Outlast 2
Shared: Psychological Horror · Horror · Atmospheric

Five Nights at Freddy's
Shared: Psychological Horror · Horror · Survival Horror

Garten of Banban
Shared: Psychological Horror · Horror · First-Person

Visage
Shared: Psychological Horror · Horror · Dark

What Remains of Edith Finch
Shared: Atmospheric · Mystery · Psychological Horror

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

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

Mouthwashing
Shared: Psychological Horror · Atmospheric · Horror

Layers of Fear (2016)
Shared: Psychological Horror · Atmospheric · Horror

Little Nightmares
Shared: Atmospheric · Horror · Dark

Lethal Company
Shared: Horror · Psychological Horror · First-Person

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

Amnesia: A Machine For Pigs
Shared: Atmospheric · Psychological Horror · Horror

Firewatch
Shared: Atmospheric · Mystery · First-Person

The Room Two
Shared: Atmospheric · Mystery · Horror

Sally Face - Episode One
Shared: Psychological Horror · Dark · Horror

Five Nights at Freddy's 2
Shared: Psychological Horror · Horror · Survival Horror

Garten of Banban 2
Shared: Psychological Horror · Horror · Dark

From The Darkness
Shared: Psychological Horror · Horror · Dark

Slender: The Arrival
Shared: Horror · Psychological Horror · Dark