Games like Saint of Chains
Games like Saint of Chains include Outlast, SOMA, Outlast 2, Resident Evil Village, and Mouthwashing. We matched them by the tags players give Saint of Chains on Steam (Psychological Horror, Survival Horror, Retro, Atmospheric, and FPS): closest matches first, and among equally close ones the better-known games.

Outlast
Shared: Survival Horror · Psychological Horror · Horror

SOMA
Shared: Psychological Horror · Atmospheric · Horror

Outlast 2
Shared: Psychological Horror · Survival Horror · Horror

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

Mouthwashing
Shared: Psychological Horror · Atmospheric · Retro

METRO 2033 Redux
Shared: Atmospheric · FPS · Horror

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

Metro Exodus
Shared: FPS · Atmospheric · Horror

Poppy Playtime
Shared: Horror · Survival Horror · Psychological Horror

Darkwood
Shared: Survival Horror · Psychological Horror · Horror

Lethal Company
Shared: Survival Horror · Horror · Psychological Horror

METRO Last Light Redux
Shared: Atmospheric · FPS · Horror

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

Visage
Shared: Psychological Horror · Survival Horror · Horror

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

SILENT HILL 2
Shared: Psychological Horror · Survival Horror · Horror

Lost in Vivo
Shared: Psychological Horror · Survival Horror · Atmospheric

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

BioShock™ Remastered
Shared: FPS · Atmospheric · Horror

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

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

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

Choo-Choo Charles
Shared: Survival Horror · Horror · First-Person

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