Games like Quarantine City
Games like Quarantine City include BALL x PIT, Bit Blaster XL, Hotline Miami, Nuclear Throne, and POSTAL: Brain Damaged. We matched them by the tags players give Quarantine City on Steam (Action, Shooter, Bullet Hell, Shoot 'Em Up, and Top-Down Shooter): closest matches first, and among equally close ones the better-known games.
BALL x PIT
Shared: Action · Bullet Hell · Shoot 'Em Up
Bit Blaster XL
Shared: Bullet Hell · Shooter · Shoot 'Em Up
Hotline Miami
Shared: Action · Pixel Graphics · Top-Down
Nuclear Throne
Shared: Action · Bullet Hell · Pixel Graphics
POSTAL: Brain Damaged
Shared: Action · Shooter · Stylized
Hotline Miami 2: Wrong Number
Shared: Action · Pixel Graphics · Top-Down
Planes, Bullets and Vodka
Shared: Action · Shoot 'Em Up · Bullet Hell
20 Minutes Till Dawn
Shared: Bullet Hell · Shoot 'Em Up · Top-Down Shooter
12 is Better Than 6
Shared: Action · Shooter · Top-Down Shooter
Enter the Gungeon
Shared: Bullet Hell · Pixel Graphics · Action
Broforce
Shared: Action · Pixel Graphics · 2D
Angel at Dusk
Shared: Action · Shooter · Bullet Hell
LUFTRAUSERS
Shared: Bullet Hell · Action · Shoot 'Em Up
Vampire Survivors
Shared: Bullet Hell · Pixel Graphics · 2D
Sky Force Reloaded
Shared: Shoot 'Em Up · Bullet Hell · Action
DoDonPachi Resurrection
Shared: Bullet Hell · Shooter · Shoot 'Em Up
Escape From Duckov
Shared: Action · Shooter · Top-Down Shooter
Star of Providence
Shared: Bullet Hell · Shoot 'Em Up · Action
Bot Vice
Shared: Bullet Hell · Top-Down Shooter · Shoot 'Em Up
ZeroRanger
Shared: Shoot 'Em Up · Bullet Hell · Action
Revolution Ace
Shared: Action · Shoot 'Em Up · Bullet Hell
Halls of Torment
Shared: Bullet Hell · Action · Pixel Graphics
Exit the Gungeon
Shared: Action · Bullet Hell · 2D
Gem Defender: Soyjak Survivors
Shared: Action · Shooter · Bullet Hell