Games like Project Root
Games like Project Root include LUFTRAUSERS, Bit Blaster XL, Nova Drift, Revolution Ace, and ZeroRanger. We matched them by the tags players give Project Root on Steam (Action, Indie, Shoot 'Em Up, Shooter, and Arcade): closest matches first, and among equally close ones the better-known games.
LUFTRAUSERS
Shared: Indie · Action · Arcade
Bit Blaster XL
Shared: Shoot 'Em Up · Bullet Hell · Shooter
Nova Drift
Shared: Shoot 'Em Up · Bullet Hell · Arcade
Revolution Ace
Shared: Action · Shoot 'Em Up · Indie
ZeroRanger
Shared: Indie · Shoot 'Em Up · Action
Ikaruga
Shared: Shoot 'Em Up · Action · Arcade
Sky Force Reloaded
Shared: Shoot 'Em Up · Arcade · Action
BALL x PIT
Shared: Action · Arcade · Bullet Hell
Planes, Bullets and Vodka
Shared: Action · Shoot 'Em Up · Arcade
Star Saviors
Shared: Action · Shoot 'Em Up · Indie
Touhou Kinjoukyou ～ Fossilized Wonders.
Shared: Shoot 'Em Up · Action · Shooter
DRAINUS
Shared: Action · Indie · Shoot 'Em Up
Touhou Kouryudou ~ Unconnected Marketeers.
Shared: Action · Shoot 'Em Up · Bullet Hell
Exit the Gungeon
Shared: Indie · Action · Arcade
Nex Machina
Shared: Action · Indie · Bullet Hell
BLUE REVOLVER
Shared: Shoot 'Em Up · Indie · Action
Waves
Shared: Shoot 'Em Up · Bullet Hell · Shooter
Sine Mora
Shared: Indie · Shoot 'Em Up · Action
Touhou Juuouen 〜 Unfinished Dream of All Living Ghost.
Shared: Action · Shoot 'Em Up · Shooter
Commando Collection
Shared: Action · Shooter · Arcade
Chicken Invaders 5
Shared: Action · Indie · Shoot 'Em Up
Beat Hazard
Shared: Shoot 'Em Up · Bullet Hell · Indie
Jets'n'Guns Gold
Shared: Shoot 'Em Up · Action · Indie
Vampire Survivors
Shared: Bullet Hell · Indie · Action