Games like Box of Broken Nails
Games like Box of Broken Nails include Mouthwashing, [Chillas Art] The Convenience Store, Summer of '58, Fears to Fathom - Ironbark Lookout, and SOMA. We matched them by the tags players give Box of Broken Nails on Steam (Psychological Horror, Psychological, Atmospheric, Exploration, and Horror): closest matches first, and among equally close ones the better-known games.

Mouthwashing
Shared: Psychological Horror · Atmospheric · Horror

[Chillas Art] The Convenience Store
Shared: Psychological Horror · Horror · Atmospheric

Summer of '58
Shared: Psychological Horror · Atmospheric · Horror

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

SOMA
Shared: Psychological Horror · Atmospheric · Horror

SILENT HILL 2
Shared: Psychological Horror · Horror · Atmospheric

Outlast
Shared: Psychological Horror · Horror · Atmospheric

Scanner Sombre
Shared: Exploration · Atmospheric · Horror

The Exit 8
Shared: Exploration · Psychological Horror · Horror

Lethal Company
Shared: Horror · Psychological Horror · Exploration

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

Firewatch
Shared: Atmospheric · Exploration · Walking Simulator

MiSide
Shared: Psychological Horror · Horror · Atmospheric

The Park®
Shared: Psychological Horror · Horror · Atmospheric

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

Amnesia: A Machine For Pigs
Shared: Horror · Atmospheric · Psychological Horror

Superliminal
Shared: Psychological · Surreal · Psychological Horror

What Remains of Edith Finch
Shared: Atmospheric · Exploration · Walking Simulator

Escape the Backrooms
Shared: Psychological Horror · Horror · Exploration

SILENT HILL f
Shared: Psychological Horror · Horror · Psychological

September 7th
Shared: Psychological Horror · Exploration · Horror

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

Still Wakes the Deep
Shared: Psychological Horror · Horror · Atmospheric

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