Games like NEON
Games like NEON include Portal 2, Portal, VLADiK BRUTAL, Neon White, and Defy Gravity Extended. We matched them by the tags players give NEON on Steam (Casual, Platformer, Puzzle, Shooter, and 3D Platformer): closest matches first, and among equally close ones the better-known games.

Portal 2
Shared: Platformer · Puzzle · Puzzle Platformer

Portal
Shared: Puzzle · 3D Platformer · Puzzle Platformer

VLADiK BRUTAL
Shared: Shooter · FPS · Casual

Neon White
Shared: Platformer · 3D Platformer · FPS

Defy Gravity Extended
Shared: Platformer · Puzzle · Puzzle Platformer

LIMBO
Shared: Puzzle · Platformer · Puzzle Platformer

Chained Together
Shared: Platformer · Casual · Puzzle Platformer

Liars Bar
Shared: Casual · FPS · Indie

Refunct
Shared: 3D Platformer · Casual · Platformer

Climb The Backrooms
Shared: Casual · Platformer · Puzzle

FEZ
Shared: Platformer · Puzzle · Casual

Quantum Conundrum
Shared: Puzzle · 3D Platformer · Casual

Supraland
Shared: Puzzle Platformer · Puzzle · FPS

DeadCore
Shared: Platformer · FPS · Indie

SUPERHOT
Shared: FPS · Shooter · Puzzle

A Story About My Uncle
Shared: Platformer · First-Person · Indie

EDGE
Shared: Puzzle · Platformer · Puzzle Platformer

s&box
Shared: Casual · Shooter · 3D Platformer

Braid
Shared: Puzzle · Platformer · Puzzle Platformer

How to Fish
Shared: Shooter · Indie · FPS

Shady Part of Me
Shared: Puzzle · Platformer · Indie

Trine 2: Complete Story
Shared: Platformer · Puzzle Platformer · Puzzle

Nihilumbra
Shared: Platformer · Casual · Puzzle

VHOLUME
Shared: Platformer · Casual · 3D Platformer