Games like Gunpowder Punk
Games like Gunpowder Punk include Katana ZERO, Vampire Survivors, LUFTRAUSERS, Huntdown, and Bit Blaster XL. We matched them by the tags players give Gunpowder Punk on Steam (Action, Shoot 'Em Up, 2D Fighter, Bullet Hell, and 2D): closest matches first, and among equally close ones the better-known games.

Katana ZERO
Shared: Action · Pixel Graphics · Cyberpunk

Vampire Survivors
Shared: Bullet Hell · 2D · Pixel Graphics

LUFTRAUSERS
Shared: Action · Bullet Hell · Shoot 'Em Up

Huntdown
Shared: Action · Shoot 'Em Up · Pixel Graphics

Bit Blaster XL
Shared: Shoot 'Em Up · Bullet Hell · Action

Broforce
Shared: Action · 2D · Pixel Graphics

Hotline Miami
Shared: Action · Pixel Graphics · Indie

BALL x PIT
Shared: Action · Bullet Hell · Shoot 'Em Up

ZeroRanger
Shared: Shoot 'Em Up · Action · Bullet Hell

BlazBlue Entropy Effect
Shared: Action · 2D · Pixel Graphics

SANABI
Shared: Action · Pixel Graphics · Cyberpunk

Planes, Bullets and Vodka
Shared: Action · Shoot 'Em Up · Bullet Hell

Star of Providence
Shared: Shoot 'Em Up · Bullet Hell · Action

Hotline Miami 2: Wrong Number
Shared: Action · Pixel Graphics · Gore

DRAINUS
Shared: Action · Shoot 'Em Up · 2D

Your Only Move Is HUSTLE
Shared: Action · 2D Fighter · 2D

CARRION
Shared: Action · Pixel Graphics · 2D

My Friend Pedro
Shared: Action · Shooter · Indie

Touhou Koumakyou: New Classic - the Embodiment of Scarlet Devil
Shared: Shoot 'Em Up · Bullet Hell · Action

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

Akane
Shared: Action · Cyberpunk · Pixel Graphics

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

Blasphemous
Shared: 2D · Pixel Graphics · Action

Turbo Overkill
Shared: Action · Cyberpunk · Shooter