Games like Lights Out Dark House
Games like Lights Out Dark House include MiSide, Outlast, No, I'm not a Human, Little Nightmares, and Mouthwashing. We matched them by the tags players give Lights Out Dark House on Steam (3D, Atmospheric, Horror, Psychological Horror, and Psychological): closest matches first, and among equally close ones the better-known games.

MiSide
Shared: Psychological Horror · Horror · 3D

Outlast
Shared: Horror · Atmospheric · Psychological Horror

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

Little Nightmares
Shared: Atmospheric · Horror · Singleplayer

Mouthwashing
Shared: Horror · Psychological Horror · Atmospheric

Buckshot Roulette
Shared: Horror · 3D · Singleplayer

Little Nightmares II
Shared: Horror · Atmospheric · Singleplayer

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

SILENT HILL 2
Shared: Horror · Psychological Horror · Atmospheric

Escape the Backrooms
Shared: Horror · Psychological Horror · 3D

SOMA
Shared: Horror · Atmospheric · Psychological Horror

Visage
Shared: Horror · Psychological Horror · Atmospheric

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

Poppy Playtime
Shared: Horror · Singleplayer · Psychological Horror

Subliminal
Shared: Atmospheric · Psychological Horror · Singleplayer

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

Garten of Banban
Shared: Horror · Psychological Horror · Singleplayer

Backrooms: Escape Together
Shared: Horror · Psychological Horror · Atmospheric

Five Nights at Freddy's: Security Breach
Shared: Horror · Singleplayer · 3D

Outlast 2
Shared: Horror · Psychological Horror · Atmospheric

Hellblade: Senua's Sacrifice
Shared: Atmospheric · Psychological · Singleplayer

Zoochosis
Shared: 3D · Horror · Atmospheric

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

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