Games like Earl vs. the Mutants
Games like Earl vs. the Mutants include 20 Minutes Till Dawn, BALL x PIT, Vampire Survivors, Voidigo, and Nova Drift. We matched them by the tags players give Earl vs. the Mutants on Steam (Vehicular Combat, Shoot 'Em Up, Post-apocalyptic, Bullet Hell, and Twin Stick Shooter): closest matches first, and among equally close ones the better-known games.

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

BALL x PIT
Shared: Bullet Hell · Shoot 'Em Up · Roguelite

Vampire Survivors
Shared: Bullet Hell · Action Roguelike · Roguelite

Voidigo
Shared: Twin Stick Shooter · Shoot 'Em Up · Bullet Hell

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

Dead Estate
Shared: Twin Stick Shooter · Bullet Hell · Horror

Nuclear Throne
Shared: Bullet Hell · Action Roguelike · Post-apocalyptic

Tiny Rogues
Shared: Bullet Hell · Action Roguelike · Top-Down Shooter

Greedland
Shared: Shoot 'Em Up · Bullet Hell · Twin Stick Shooter

Halls of Torment
Shared: Bullet Hell · Action Roguelike · Roguelite

Deep Rock Galactic: Survivor
Shared: Bullet Hell · Action Roguelike · Top-Down Shooter

Rogue: Genesia
Shared: Bullet Hell · Twin Stick Shooter · Action Roguelike

Enter the Gungeon
Shared: Bullet Hell · Action Roguelike · Twin Stick Shooter

Time Wasters
Shared: Bullet Hell · Twin Stick Shooter · Shoot 'Em Up

Brotato
Shared: Bullet Hell · Action Roguelike · Roguelike

Mad Max
Shared: Vehicular Combat · Post-apocalyptic · Driving

Soulstone Survivors
Shared: Bullet Hell · Action Roguelike · Roguelite

R.I.P. - Reincarnation Insurance Program
Shared: Bullet Hell · Shoot 'Em Up · Action Roguelike

Blazing Beaks
Shared: Action Roguelike · Top-Down Shooter · Roguelite

Megabonk
Shared: Bullet Hell · Action Roguelike · Roguelite

Pesticide Not Required
Shared: Shoot 'Em Up · Bullet Hell · Action Roguelike

Yet Another Zombie Survivors
Shared: Top-Down Shooter · Action Roguelike · Roguelite

Slime 3K: Rise Against Despot
Shared: Bullet Hell · Shoot 'Em Up · Action Roguelike

Insect Swarm
Shared: Shoot 'Em Up · Twin Stick Shooter · Top-Down Shooter