Games like Impulse Reactor
Games like Impulse Reactor include Vampire Survivors, Nova Drift, Bit Blaster XL, BALL x PIT, and LUFTRAUSERS. We matched them by the tags players give Impulse Reactor on Steam (Bullet Hell, Shoot 'Em Up, Roguelite, Auto Battler, and Shooter): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Bullet Hell · Roguelite · 2D

Nova Drift
Shared: Bullet Hell · Shoot 'Em Up · Roguelite

Bit Blaster XL
Shared: Bullet Hell · Shoot 'Em Up · Shooter

BALL x PIT
Shared: Roguelite · Bullet Hell · Arcade

LUFTRAUSERS
Shared: Bullet Hell · Arcade · Shoot 'Em Up

ZeroRanger
Shared: Shoot 'Em Up · Bullet Hell · Arcade

Ikaruga
Shared: Bullet Hell · Shoot 'Em Up · Arcade

Star of Providence
Shared: Bullet Hell · Roguelite · Shoot 'Em Up

Planes, Bullets and Vodka
Shared: Shoot 'Em Up · Bullet Hell · Action

Star Saviors
Shared: Bullet Hell · Shoot 'Em Up · Action

Sky Force Reloaded
Shared: Shoot 'Em Up · Bullet Hell · Arcade

Halls of Torment
Shared: Bullet Hell · Roguelite · Pixel Graphics

Revolution Ace
Shared: Shoot 'Em Up · Bullet Hell · Shooter

DoDonPachi Resurrection
Shared: Shoot 'Em Up · Bullet Hell · Shooter

20 Minutes Till Dawn
Shared: Bullet Hell · Roguelite · Shoot 'Em Up

Enter the Gungeon
Shared: Bullet Hell · Pixel Graphics · 2D

Boneraiser Minions
Shared: Bullet Hell · Roguelite · 2D

DRAINUS
Shared: Shoot 'Em Up · Shooter · Bullet Hell

Death Must Die
Shared: Bullet Hell · Roguelite · Pixel Graphics

Megabonk
Shared: Roguelite · Bullet Hell · Action

Broforce
Shared: Action · 2D · Pixel Graphics

Huntdown
Shared: Shooter · Shoot 'Em Up · Pixel Graphics

Brotato
Shared: Bullet Hell · Roguelite · Local Co-Op

Steredenn: Binary Stars
Shared: Shoot 'Em Up · Bullet Hell · Roguelite