Games like Ad Infernum
Games like Ad Infernum include Outlast, Darkwood, SOMA, Amnesia: The Bunker, and The Outlast Trials. We matched them by the tags players give Ad Infernum on Steam (Immersive Sim, Survival Horror, Psychological Horror, Atmospheric, and Demons): closest matches first, and among equally close ones the better-known games.

Outlast
Shared: Survival Horror · Atmospheric · Psychological Horror

Darkwood
Shared: Survival Horror · Psychological Horror · Action

SOMA
Shared: Psychological Horror · Atmospheric · Survival Horror

Amnesia: The Bunker
Shared: Survival Horror · Immersive Sim · Atmospheric

The Outlast Trials
Shared: Survival Horror · Psychological Horror · Horror

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

Outlast 2
Shared: Survival Horror · Psychological Horror · Atmospheric

Poppy Playtime
Shared: Survival Horror · Psychological Horror · Horror

Lethal Company
Shared: Survival Horror · Psychological Horror · Horror

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

Dead Space
Shared: Survival Horror · Psychological Horror · Horror

Pacify
Shared: Psychological Horror · Survival Horror · Horror

The Evil Within 2
Shared: Survival Horror · Psychological Horror · Action

SILENT HILL f
Shared: Psychological Horror · Survival Horror · Action

Little Nightmares
Shared: Atmospheric · Adventure · Dark

SIGNALIS
Shared: Survival Horror · Psychological Horror · Atmospheric

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

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

The Evil Within
Shared: Survival Horror · Psychological Horror · Atmospheric

Little Nightmares II
Shared: Atmospheric · Psychological Horror · Adventure

Visage
Shared: Survival Horror · Psychological Horror · Dark

Choo-Choo Charles
Shared: Survival Horror · Dark · Horror

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

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