Games like Gamma Blast
Games like Gamma Blast include LUFTRAUSERS, Nova Drift, Bit Blaster XL, Revolution Ace, and ZeroRanger. We matched them by the tags players give Gamma Blast on Steam (Action, Indie, Bullet Hell, Shoot 'Em Up, and Arcade): closest matches first, and among equally close ones the better-known games.
LUFTRAUSERS
Shared: Indie · Bullet Hell · Action
Nova Drift
Shared: Bullet Hell · Shoot 'Em Up · Arcade
Bit Blaster XL
Shared: Bullet Hell · Shoot 'Em Up · Action
Revolution Ace
Shared: Action · Indie · Shoot 'Em Up
ZeroRanger
Shared: Indie · Shoot 'Em Up · Bullet Hell
Ikaruga
Shared: Bullet Hell · Shoot 'Em Up · Action
BALL x PIT
Shared: Action · Bullet Hell · Arcade
Sky Force Reloaded
Shared: Shoot 'Em Up · Bullet Hell · Arcade
Star Saviors
Shared: Action · Bullet Hell · Shoot 'Em Up
Planes, Bullets and Vodka
Shared: Action · Shoot 'Em Up · Bullet Hell
Touhou Kinjoukyou ～ Fossilized Wonders.
Shared: Bullet Hell · Action · Shoot 'Em Up
DRAINUS
Shared: Action · Indie · Shoot 'Em Up
Exit the Gungeon
Shared: Indie · Action · Arcade
Touhou Kouryudou ~ Unconnected Marketeers.
Shared: Action · Bullet Hell · Shoot 'Em Up
Nex Machina
Shared: Action · Bullet Hell · Indie
BLUE REVOLVER
Shared: Indie · Bullet Hell · Action
Vampire Survivors
Shared: Bullet Hell · Indie · Action
Waves
Shared: Bullet Hell · Shoot 'Em Up · Arcade
Sine Mora
Shared: Indie · Action · Shoot 'Em Up
Touhou Juuouen 〜 Unfinished Dream of All Living Ghost.
Shared: Action · Bullet Hell · Shoot 'Em Up
Commando Collection
Shared: Action · Bullet Hell · Shooter
Beat Hazard
Shared: Bullet Hell · Shoot 'Em Up · Indie
Jets'n'Guns Gold
Shared: Action · Shoot 'Em Up · Indie
Touhou Koumakyou: New Classic - the Embodiment of Scarlet Devil
Shared: Bullet Hell · Shoot 'Em Up · Action