Games like ZPF
Games like ZPF include Bit Blaster XL, Huntdown, SANABI, Broforce, and DRAINUS. We matched them by the tags players give ZPF on Steam (Side Scroller, Bullet Hell, Shoot 'Em Up, Shooter, and Action-Adventure): closest matches first, and among equally close ones the better-known games.
Bit Blaster XL
Shared: Bullet Hell · Shoot 'Em Up · Shooter
Huntdown
Shared: Side Scroller · Shooter · Shoot 'Em Up
SANABI
Shared: Cyberpunk · Pixel Graphics · Action
Broforce
Shared: 2D · Action · Side Scroller
DRAINUS
Shared: Shoot 'Em Up · Shooter · Bullet Hell
Zombotron
Shared: 2D · Action · Shooter
Vampire Survivors
Shared: Bullet Hell · 2D · Pixel Graphics
Jets'n'Guns Gold
Shared: Side Scroller · Shoot 'Em Up · Bullet Hell
Touhou Luna Nights
Shared: Side Scroller · Bullet Hell · Action-Adventure
ZeroRanger
Shared: Shoot 'Em Up · Bullet Hell · 2D
Nova Drift
Shared: Bullet Hell · Shoot 'Em Up · Shooter
Planes, Bullets and Vodka
Shared: Shoot 'Em Up · Bullet Hell · Shooter
LUFTRAUSERS
Shared: Bullet Hell · Shoot 'Em Up · 2D
Kero Blaster
Shared: Side Scroller · Shoot 'Em Up · Shooter
Skul: The Hero Slayer
Shared: Action · 2D · Pixel Graphics
BlazBlue Entropy Effect
Shared: 2D · Action-Adventure · Action
Guns, Gore and Cannoli 2
Shared: Side Scroller · 2D · Action
Rabi-Ribi
Shared: Bullet Hell · Side Scroller · Action-Adventure
Bot Vice
Shared: Bullet Hell · Shoot 'Em Up · Action-Adventure
Enter the Gungeon
Shared: Bullet Hell · Pixel Graphics · 2D
Star Saviors
Shared: Bullet Hell · Shoot 'Em Up · Action
METAL SLUG
Shared: Side Scroller · Shoot 'Em Up · 2D
TEVI
Shared: Bullet Hell · Action-Adventure · Side Scroller
Jets'n'Guns 2
Shared: Shoot 'Em Up · Side Scroller · Bullet Hell