Games like Where the Walls Breathe
Games like Where the Walls Breathe include Firewatch, What Remains of Edith Finch, Mouthwashing, SOMA, and Amnesia: A Machine For Pigs. We matched them by the tags players give Where the Walls Breathe on Steam (Horror, Exploration, Walking Simulator, First-Person, and Surreal): closest matches first, and among equally close ones the better-known games.

Firewatch
Shared: Walking Simulator · First-Person · Story Rich

What Remains of Edith Finch
Shared: Walking Simulator · Exploration · Story Rich

Mouthwashing
Shared: Horror · Psychological Horror · Story Rich

SOMA
Shared: Horror · Psychological Horror · Exploration

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

Summer of '58
Shared: Horror · Walking Simulator · First-Person

Layers of Fear (2016)
Shared: Horror · Walking Simulator · Psychological Horror

Fears to Fathom - Ironbark Lookout
Shared: Horror · Exploration · Psychological Horror

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

Visage
Shared: Horror · Psychological Horror · First-Person

The Exit 8
Shared: Exploration · Horror · Walking Simulator

Lethal Company
Shared: Horror · First-Person · Exploration

The Park®
Shared: Horror · Walking Simulator · First-Person

MiSide
Shared: Horror · Psychological Horror · First-Person

The Complex: Expedition
Shared: Horror · Exploration · Psychological Horror

Outlast
Shared: Horror · First-Person · Psychological Horror

DON'T SCREAM
Shared: Horror · Psychological Horror · First-Person

POOLS
Shared: Walking Simulator · Exploration · Psychological Horror

SILENT HILL 2
Shared: Horror · Psychological Horror · Story Rich

[Chillas Art] The Convenience Store
Shared: Horror · Psychological Horror · First-Person

Superliminal
Shared: First-Person · Surreal · Story Rich

Outer Wilds
Shared: Exploration · Story Rich · Horror

Anemoiapolis: Chapter 1
Shared: Horror · Exploration · First-Person

Poppy Playtime
Shared: Horror · First-Person · Psychological Horror