Games like Inside Intruder
Games like Inside Intruder include MiSide, OMORI, Mouthwashing, SILENT HILL 2, and DISTRAINT: Deluxe Edition. We matched them by the tags players give Inside Intruder on Steam (Psychological Horror, Horror, Story Rich, 3D, and Pixel Graphics): closest matches first, and among equally close ones the better-known games.

MiSide
Shared: Psychological Horror · Story Rich · Horror

OMORI
Shared: Psychological Horror · Story Rich · Pixel Graphics

Mouthwashing
Shared: Psychological Horror · Horror · Story Rich

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

DISTRAINT: Deluxe Edition
Shared: Psychological Horror · Horror · Pixel Graphics

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

Sally Face - Episode One
Shared: Psychological Horror · Story Rich · Horror

Fran Bow
Shared: Psychological Horror · Story Rich · Horror

Little Nightmares
Shared: Horror · Atmospheric · Story Rich

Little Nightmares II
Shared: Horror · Psychological Horror · Story Rich

SOMA
Shared: Psychological Horror · Horror · Story Rich

Tales of the Black Forest
Shared: Horror · Pixel Graphics · Story Rich

The Test
Shared: Story Rich · Psychological Horror · Pixel Graphics

FAITH: The Unholy Trinity
Shared: Horror · Psychological Horror · Pixel Graphics

DISTRAINT 2
Shared: Psychological Horror · Horror · Story Rich

Layers of Fear (2016)
Shared: Psychological Horror · Horror · Story Rich

OneShot
Shared: Story Rich · Pixel Graphics · Indie

The Cat Lady
Shared: Horror · Story Rich · Psychological Horror

Hellblade: Senua's Sacrifice
Shared: Story Rich · Atmospheric · Horror

INMOST
Shared: Pixel Graphics · Story Rich · Indie

Milk outside a bag of milk outside a bag of milk
Shared: Psychological Horror · Story Rich · Pixel Graphics

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

KinitoPET
Shared: Psychological Horror · Horror · Story Rich

Tiny Bunny
Shared: Horror · Story Rich · Psychological Horror