Games like Metallophobia
Games like Metallophobia include Vampire Survivors, Enter the Gungeon, Nuclear Throne, BALL x PIT, and BlazBlue Entropy Effect. We matched them by the tags players give Metallophobia on Steam (Action, Shooter, Bullet Hell, 2D, and Pixel Graphics): closest matches first, and among equally close ones the better-known games.

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

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

Nuclear Throne
Shared: Pixel Graphics · Action · Action Roguelike

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

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

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

Skul: The Hero Slayer
Shared: Action · Pixel Graphics · 2D

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

Dome Keeper
Shared: Action · Roguelike · Post-apocalyptic

Dead Cells
Shared: Pixel Graphics · 2D · Roguelike

Megabonk
Shared: Bullet Hell · Action Roguelike · Action

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

Neon Abyss
Shared: Roguelike · Shooter · Pixel Graphics

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

Dungreed
Shared: Action · Pixel Graphics · Action Roguelike

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

Nova Drift
Shared: Bullet Hell · Shooter · Action Roguelike

Neon Abyss 2
Shared: Action · Action Roguelike · Cyberpunk

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

Noobs Want to Live
Shared: Bullet Hell · Action · Pixel Graphics

Returnal™
Shared: Action · Bullet Hell · Roguelike

Broforce
Shared: Action · Pixel Graphics · 2D

Brotato
Shared: Bullet Hell · Roguelike · Action Roguelike

SANABI
Shared: Action · Pixel Graphics · Cyberpunk