Games like Neon Souls
Games like Neon Souls include Hylics, Manifold Garden, Antichamber, Happy Game, and Milk outside a bag of milk outside a bag of milk. We matched them by the tags players give Neon Souls on Steam (Psychedelic, Surreal, Minimalist, Atmospheric, and Abstract): closest matches first, and among equally close ones the better-known games.

Hylics
Shared: Surreal · Psychedelic · Abstract

Manifold Garden
Shared: Surreal · Psychedelic · Abstract

Antichamber
Shared: Surreal · Abstract · Minimalist

Happy Game
Shared: Psychedelic · Atmospheric · Surreal

Milk outside a bag of milk outside a bag of milk
Shared: Psychedelic · Abstract · Surreal

Lucid Blocks
Shared: Psychedelic · Surreal · Atmospheric

LIMBO
Shared: Atmospheric · Surreal · Indie

OneShot
Shared: Atmospheric · Indie · Surreal

OVIVO
Shared: Minimalist · Surreal · Atmospheric

AMID EVIL
Shared: Old School · Surreal · Psychedelic

NaissanceE
Shared: Atmospheric · Abstract · Surreal

100 hidden snails
Shared: Abstract · Minimalist · Psychedelic

Momodora: Reverie Under The Moonlight
Shared: Side Scroller · 2D Platformer · Pixel Graphics

Hotline Miami
Shared: Psychedelic · Indie · Surreal

Samorost 1
Shared: Surreal · Psychedelic · Colorful

A Dance of Fire and Ice
Shared: Psychedelic · Colorful · 2D

Everhood
Shared: Psychedelic · Surreal · 2D

Rain World
Shared: Atmospheric · Indie · 2D

Monument Valley 3
Shared: Atmospheric · Colorful · Surreal

GRIS
Shared: Atmospheric · Indie · Colorful

Thomas Was Alone
Shared: Side Scroller · Atmospheric · 2D Platformer

DISTRAINT 2
Shared: Atmospheric · Side Scroller · Surreal

Lone Fungus
Shared: Colorful · Atmospheric · 2D Platformer

Post Void
Shared: Psychedelic · Surreal · Colorful