Games like Exilus Viper
Games like Exilus Viper include Bit Blaster XL, Nova Drift, Planes, Bullets and Vodka, BALL x PIT, and Sky Force Reloaded. We matched them by the tags players give Exilus Viper on Steam (Bullet Hell, Shoot 'Em Up, Shooter, Arcade, and 2D): closest matches first, and among equally close ones the better-known games.
Bit Blaster XL
Shared: Bullet Hell · Shoot 'Em Up · Shooter
Nova Drift
Shared: Bullet Hell · Shoot 'Em Up · Arcade
Planes, Bullets and Vodka
Shared: Shoot 'Em Up · Bullet Hell · Arcade
BALL x PIT
Shared: Bullet Hell · Arcade · Shoot 'Em Up
Sky Force Reloaded
Shared: Shoot 'Em Up · Bullet Hell · Arcade
Revolution Ace
Shared: Shoot 'Em Up · Bullet Hell · Shooter
ZeroRanger
Shared: Shoot 'Em Up · Bullet Hell · Arcade
Ikaruga
Shared: Bullet Hell · Shoot 'Em Up · Arcade
Star Saviors
Shared: Bullet Hell · Shoot 'Em Up · Arcade
LUFTRAUSERS
Shared: Bullet Hell · Arcade · Shoot 'Em Up
Vampire Survivors
Shared: Bullet Hell · 2D · Arcade
Touhou Kinjoukyou ～ Fossilized Wonders.
Shared: Bullet Hell · Shoot 'Em Up · Shooter
Waves
Shared: Bullet Hell · Shoot 'Em Up · Shooter
DoDonPachi Resurrection
Shared: Shoot 'Em Up · Bullet Hell · Shooter
Assault Android Cactus+
Shared: Bullet Hell · Shoot 'Em Up · Shooter
Beat Hazard
Shared: Bullet Hell · Shoot 'Em Up · 2D
Exit the Gungeon
Shared: Arcade · Bullet Hell · 2D
Cyberhunt
Shared: Shoot 'Em Up · Arcade · Action
Nex Machina
Shared: Bullet Hell · Arcade · Shoot 'Em Up
Chippy
Shared: Bullet Hell · Shoot 'Em Up · Arcade
Super Bit Blaster XL
Shared: Bullet Hell · Shoot 'Em Up · Arcade
DRAINUS
Shared: Shoot 'Em Up · Shooter · Bullet Hell
Touhou Juuouen 〜 Unfinished Dream of All Living Ghost.
Shared: Shoot 'Em Up · Bullet Hell · Shooter
Space Invaders Extreme
Shared: Bullet Hell · Shoot 'Em Up · Arcade