Games like The Inner Demons
Games like The Inner Demons include Little Nightmares, Bramble: The Mountain King, Little Nightmares II, MiSide, and Alan Wake. We matched them by the tags players give The Inner Demons on Steam (Adventure, 3D, Cinematic, Third Person, and Atmospheric): closest matches first, and among equally close ones the better-known games.

Little Nightmares
Shared: Adventure · Atmospheric · Horror

Bramble: The Mountain King
Shared: Adventure · Cinematic · Horror

Little Nightmares II
Shared: Adventure · Horror · Atmospheric

MiSide
Shared: Psychological Horror · 3D · Horror

Alan Wake
Shared: Adventure · Third Person · Horror

A Plague Tale: Innocence
Shared: Adventure · Atmospheric · Third Person

A Plague Tale: Requiem
Shared: Adventure · Cinematic · Third Person

SILENT HILL 2
Shared: Horror · Psychological Horror · Atmospheric

Tomb Raider Game of the Year
Shared: Adventure · Third Person · Atmospheric

The Medium
Shared: Adventure · Horror · Atmospheric

ROUTINE
Shared: Cinematic · Adventure · Atmospheric

Outlast
Shared: Horror · Atmospheric · Psychological Horror

DreadOut
Shared: Adventure · Horror · Third Person

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

SILENT HILL f
Shared: Horror · Psychological Horror · Adventure

Stray
Shared: Adventure · Atmospheric · Third Person

Hellblade: Senua's Sacrifice
Shared: Atmospheric · Adventure · Third Person

Alan Wake's American Nightmare
Shared: Adventure · Third Person · Horror

Detention
Shared: Horror · Adventure · Atmospheric

REANIMAL
Shared: Adventure · Horror · Atmospheric

Rise of the Tomb Raider™
Shared: Adventure · Third Person · Female Protagonist

The Lightkeeper
Shared: Adventure · Horror · Atmospheric

METAL GEAR SOLID V: THE PHANTOM PAIN
Shared: Cinematic · Stealth · Third Person

Escape the Backrooms
Shared: Horror · Psychological Horror · Adventure