Games like Galactic Mecha GunSuit
Games like Galactic Mecha GunSuit include Bit Blaster XL, BALL x PIT, LUFTRAUSERS, Planes, Bullets and Vodka, and Vampire Survivors. We matched them by the tags players give Galactic Mecha GunSuit on Steam (Action, Arcade, Shooter, Visual Novel, and Bullet Hell): closest matches first, and among equally close ones the better-known games.

Bit Blaster XL
Shared: Bullet Hell · Shooter · Arcade

BALL x PIT
Shared: Action · Arcade · Bullet Hell

LUFTRAUSERS
Shared: Arcade · Action · Bullet Hell

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

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

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

Nova Drift
Shared: Arcade · Bullet Hell · Shoot 'Em Up

Ikaruga
Shared: Arcade · Action · Bullet Hell

Star Saviors
Shared: Action · Bullet Hell · Shoot 'Em Up

Revolution Ace
Shared: Action · Shoot 'Em Up · Shooter

Exit the Gungeon
Shared: Arcade · Action · Bullet Hell

DRAINUS
Shared: Action · Shooter · Shoot 'Em Up

DoDonPachi Resurrection
Shared: Shooter · Arcade · Bullet Hell

Huntdown
Shared: Action · Shooter · Pixel Graphics

Broforce
Shared: Action · Pixel Graphics · 2D

Sky Force Reloaded
Shared: Arcade · Shoot 'Em Up · Bullet Hell

Cyberhunt
Shared: Action · Arcade · Shoot 'Em Up

Commando Collection
Shared: Action · Shooter · Arcade

BLUE REVOLVER
Shared: Action · Arcade · Bullet Hell

Waves
Shared: Bullet Hell · Shooter · Arcade

DEVIL BLADE REBOOT
Shared: Action · Shooter · Shoot 'Em Up

Alex Jones: NWO Wars
Shared: Action · Arcade · Shooter

Crimzon Clover World EXplosion
Shared: Action · Arcade · Shooter

METAL SLUG
Shared: Action · Arcade · 2D