Games like Neon Survivors
Games like Neon Survivors include Vampire Survivors, Skul: The Hero Slayer, Halls of Torment, Enter the Gungeon, and BALL x PIT. We matched them by the tags players give Neon Survivors on Steam (Action Roguelike, Action, Bullet Hell, Pixel Graphics, and 2D): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Action Roguelike · Bullet Hell · Pixel Graphics

Skul: The Hero Slayer
Shared: Action · Action Roguelike · Pixel Graphics

Halls of Torment
Shared: Action Roguelike · Bullet Hell · Pixel Graphics

Enter the Gungeon
Shared: Action Roguelike · Bullet Hell · Pixel Graphics

BALL x PIT
Shared: Action · Bullet Hell · Action Roguelike

Megabonk
Shared: Action Roguelike · Bullet Hell · Action

Boneraiser Minions
Shared: Action Roguelike · Bullet Hell · Pixel Graphics

Death Must Die
Shared: Action Roguelike · Bullet Hell · Pixel Graphics

Windowkill
Shared: Action · Action Roguelike · Bullet Hell

The Binding of Isaac: Rebirth
Shared: Action Roguelike · Pixel Graphics · Indie

Nuclear Throne
Shared: Action Roguelike · Pixel Graphics · Bullet Hell

BlazBlue Entropy Effect
Shared: Action Roguelike · Action · 2D

Dungreed
Shared: Action Roguelike · Pixel Graphics · Action

LUFTRAUSERS
Shared: Bullet Hell · Action · Pixel Graphics

Rogue Legacy
Shared: Action Roguelike · Action · 2D

Brotato
Shared: Action Roguelike · Bullet Hell · Singleplayer

Exit the Gungeon
Shared: Action · Bullet Hell · Arcade

Rocket Rats
Shared: Action Roguelike · Bullet Hell · Pixel Graphics

Dead Cells
Shared: Action Roguelike · Pixel Graphics · 2D

Downwell
Shared: Action Roguelike · Pixel Graphics · Action

Risk of Rain (2013)
Shared: Action Roguelike · Action · Pixel Graphics

Star of Providence
Shared: Action Roguelike · Bullet Hell · Action

20 Minutes Till Dawn
Shared: Action Roguelike · Bullet Hell · Pixel Graphics

Seraph's Last Stand
Shared: Action Roguelike · Bullet Hell · 2D