Games like Minarchy: Active Shooter
Games like Minarchy: Active Shooter include BALL x PIT, Vampire Survivors, Cuphead, Bit Blaster XL, and South Park™: The Stick of Truth™. We matched them by the tags players give Minarchy: Active Shooter on Steam (2D, Bullet Hell, Top-Down Shooter, Cartoon, and Comedy): closest matches first, and among equally close ones the better-known games.

BALL x PIT
Shared: Bullet Hell · Arcade · Action

Vampire Survivors
Shared: Bullet Hell · 2D · Arcade

Cuphead
Shared: Cartoon · 2D · Bullet Hell

Bit Blaster XL
Shared: Bullet Hell · 2D · Arcade

South Park™: The Stick of Truth™
Shared: Comedy · 2D · Dark Humor

LUFTRAUSERS
Shared: Bullet Hell · 2D · Arcade

Planes, Bullets and Vodka
Shared: Bullet Hell · 2D · Action

Halls of Torment
Shared: Bullet Hell · Dark Fantasy · Action

Kingdom Rush 5: Alliance TD
Shared: 2D · Cartoon · Strategy

Cyberhunt
Shared: 2D · Action · Arcade

Sky Force Reloaded
Shared: Bullet Hell · Top-Down Shooter · Arcade

Nova Drift
Shared: Bullet Hell · Arcade · 2D

Kingdom Rush - Tower Defense
Shared: 2D · Action · Cartoon

20 Minutes Till Dawn
Shared: Bullet Hell · Top-Down Shooter · Shoot 'Em Up

DoDonPachi Resurrection
Shared: Top-Down Shooter · Bullet Hell · 2D

Alex Jones: NWO Wars
Shared: Arcade · 2D · Action

Bot Vice
Shared: Bullet Hell · Top-Down Shooter · Arcade

Exit the Gungeon
Shared: Bullet Hell · Arcade · 2D

Shower With Your Dad Simulator 2015: Do You Still Shower With Your Dad
Shared: 2D · Arcade · Action

Chippy
Shared: Bullet Hell · Top-Down Shooter · 2D

Utopia Must Fall
Shared: Arcade · Bullet Hell · 2D

Death Must Die
Shared: Bullet Hell · 2D · Action

ZeroRanger
Shared: Bullet Hell · 2D · Arcade

DELTARUNE
Shared: Bullet Hell · 2D · Comedy