Games like THE_ABYSS_HAS_WALLS
Games like THE_ABYSS_HAS_WALLS include Five Nights at Freddy's: Security Breach, The Forest, Resident Evil Requiem, Resident Evil 4, and Darkwood. We matched them by the tags players give THE_ABYSS_HAS_WALLS on Steam (Action, Survival Horror, Horror, Atmospheric, and Singleplayer): closest matches first, and among equally close ones the better-known games.

Five Nights at Freddy's: Security Breach
Shared: Horror · Survival Horror · Singleplayer

The Forest
Shared: Horror · Survival Horror · Action

Resident Evil Requiem
Shared: Survival Horror · Horror · Action

Resident Evil 4
Shared: Action · Horror · Survival Horror

Darkwood
Shared: Survival Horror · Horror · Action

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

Resident Evil Village
Shared: Survival Horror · Horror · Action

Outlast
Shared: Horror · Survival Horror · Atmospheric

Resident Evil 4 (2005)
Shared: Survival Horror · Action · Horror

Five Nights at Freddy's: Secret of the Mimic
Shared: Horror · Action · Survival Horror

Resident Evil 2
Shared: Survival Horror · Horror · Singleplayer

Lethal Company
Shared: Horror · Survival Horror · Exploration

SILENT HILL: Townfall
Shared: Action · Horror · Survival Horror

Escape the Backrooms
Shared: Horror · Survival Horror · Exploration

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

Tomb Raider Game of the Year
Shared: Action · Singleplayer · Adventure

Metro Exodus
Shared: Singleplayer · Action · Atmospheric

Rise of the Tomb Raider™
Shared: Action · Singleplayer · Adventure

METRO 2033 Redux
Shared: Atmospheric · Action · Horror

Resident Evil 3
Shared: Action · Horror · Survival Horror

SILENT HILL 2
Shared: Horror · Survival Horror · Atmospheric

Dead Space
Shared: Survival Horror · Horror · Singleplayer

SILENT HILL f
Shared: Horror · Survival Horror · Action

Bendy and the Dark Revival
Shared: Horror · Action · Survival Horror