Games like Peace Under His Roof
Games like Peace Under His Roof include What Remains of Edith Finch, SOMA, Firewatch, Layers of Fear (2016), and MiSide. We matched them by the tags players give Peace Under His Roof on Steam (Psychological Horror, Horror, Atmospheric, Walking Simulator, and Exploration): closest matches first, and among equally close ones the better-known games.

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

SOMA
Shared: Psychological Horror · Horror · Atmospheric

Firewatch
Shared: Atmospheric · Walking Simulator · Story Rich

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

MiSide
Shared: Psychological Horror · Horror · Story Rich

Mouthwashing
Shared: Psychological Horror · Horror · Atmospheric

Amnesia: A Machine For Pigs
Shared: Horror · Walking Simulator · Atmospheric

Still Wakes the Deep
Shared: Psychological Horror · Horror · Walking Simulator

Outlast
Shared: Horror · Psychological Horror · Atmospheric

Scanner Sombre
Shared: Horror · Walking Simulator · Exploration

Resident Evil 7 Biohazard
Shared: Horror · First-Person · Atmospheric

Outlast 2
Shared: Psychological Horror · Horror · First-Person

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

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

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

Visage
Shared: Psychological Horror · Horror · Atmospheric

Blair Witch
Shared: Horror · Psychological Horror · First-Person

The Park®
Shared: Psychological Horror · Horror · Walking Simulator

The Beast Inside
Shared: Horror · First-Person · Psychological Horror

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

SILENT HILL 2
Shared: Psychological Horror · Horror · Atmospheric

Outer Wilds
Shared: Exploration · Atmospheric · Story Rich

Psalm 5:9-13
Shared: Psychological Horror · Horror · Exploration

Escape the Backrooms
Shared: Horror · Psychological Horror · First-Person