Games like The Inner Friend
Games like The Inner Friend include Detention, Little Nightmares II, Sally Face - Episode One, Little Nightmares, and DISTRAINT: Deluxe Edition. We matched them by the tags players give The Inner Friend on Steam (Adventure, Casual, Indie, Psychological Horror, and Thriller): closest matches first, and among equally close ones the better-known games.

Detention
Shared: Indie · Psychological Horror · Adventure

Little Nightmares II
Shared: Adventure · Psychological Horror · Puzzle

Sally Face - Episode One
Shared: Indie · Psychological Horror · Adventure

Little Nightmares
Shared: Adventure · Atmospheric · Indie

DISTRAINT: Deluxe Edition
Shared: Indie · Psychological Horror · Adventure

Firework
Shared: Indie · Psychological Horror · Puzzle

The Room Two
Shared: Adventure · Puzzle · Atmospheric

Fran Bow
Shared: Psychological Horror · Adventure · Indie

The Room
Shared: Adventure · Puzzle · Atmospheric

Gorogoa
Shared: Indie · Puzzle · Casual

Brothers - A Tale of Two Sons
Shared: Adventure · Indie · Atmospheric

Moncage
Shared: Casual · Indie · Adventure

Observation
Shared: Adventure · Indie · Atmospheric

Rusty Lake Paradise
Shared: Adventure · Indie · Puzzle

Samsara Room
Shared: Adventure · Indie · Puzzle

Tick Tock: A Tale for Two
Shared: Adventure · Indie · Casual

The Death | Thần Trùng
Shared: Psychological Horror · Adventure · Indie

The Room Three
Shared: Adventure · Indie · Puzzle

The White Door
Shared: Adventure · Indie · Psychological Horror

There Is No Game: Wrong Dimension
Shared: Indie · Adventure · Puzzle

GRIS
Shared: Indie · Adventure · Atmospheric

Servant of the Lake
Shared: Adventure · Puzzle · Indie

Pikuniku
Shared: Adventure · Indie · Casual

OneShot
Shared: Indie · Atmospheric · Adventure