Games like Galactic Sentinels
Games like Galactic Sentinels include BALL x PIT, Vampire Survivors, Bit Blaster XL, METAL SLUG, and LUFTRAUSERS. We matched them by the tags players give Galactic Sentinels on Steam (Action, Shoot 'Em Up, Arcade, Bullet Hell, and Space): closest matches first, and among equally close ones the better-known games.
BALL x PIT
Shared: Action · Arcade · Bullet Hell
Vampire Survivors
Shared: Bullet Hell · Pixel Graphics · 2D
Bit Blaster XL
Shared: Shoot 'Em Up · Bullet Hell · Arcade
METAL SLUG
Shared: Action · Arcade · Shoot 'Em Up
LUFTRAUSERS
Shared: Action · Arcade · Bullet Hell
Planes, Bullets and Vodka
Shared: Action · Shoot 'Em Up · Bullet Hell
Nova Drift
Shared: Shoot 'Em Up · Bullet Hell · Arcade
Star Saviors
Shared: Shoot 'Em Up · Action · Bullet Hell
ZeroRanger
Shared: Shoot 'Em Up · Action · Bullet Hell
Huntdown
Shared: Action · Shoot 'Em Up · Side Scroller
METAL SLUG X
Shared: Action · Arcade · Shoot 'Em Up
DARIUSBURST Chronicle Saviours
Shared: Shoot 'Em Up · Action · Arcade
Jets'n'Guns Gold
Shared: Shoot 'Em Up · Action · Side Scroller
DRAINUS
Shared: Action · Shoot 'Em Up · Bullet Hell
Super Bit Blaster XL
Shared: Shoot 'Em Up · Bullet Hell · Arcade
Exit the Gungeon
Shared: Action · Arcade · Bullet Hell
Cyberhunt
Shared: Action · Shoot 'Em Up · Arcade
Broforce
Shared: Action · Pixel Graphics · 2D
Alex Jones: NWO Wars
Shared: Action · Arcade · Shoot 'Em Up
Ikaruga
Shared: Shoot 'Em Up · Arcade · Bullet Hell
Neptunia Shooter
Shared: Action · Shoot 'Em Up · Bullet Hell
Dimension Tripper Neptune: TOP NEP
Shared: Action · Arcade · Shoot 'Em Up
METAL SLUG 3
Shared: Action · Arcade · Side Scroller
DoDonPachi Resurrection
Shared: Shoot 'Em Up · Bullet Hell · Arcade