Games like Slime Hero
Games like Slime Hero include Vampire Survivors, Enter the Gungeon, 20 Minutes Till Dawn, Terraria, and Rocket Rats. We matched them by the tags players give Slime Hero on Steam (Bullet Hell, Creature Collector, Pixel Graphics, Survival, and 2D): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Bullet Hell · Pixel Graphics · 2D

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

20 Minutes Till Dawn
Shared: Bullet Hell · Survival · Pixel Graphics

Terraria
Shared: Survival · Pixel Graphics · 2D

Rocket Rats
Shared: Bullet Hell · Pixel Graphics · 2D

Megabonk
Shared: Bullet Hell · Survival · Pixel Graphics

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

Noobs Want to Live
Shared: Bullet Hell · Pixel Graphics · Action

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

Broforce
Shared: Pixel Graphics · 2D · Action

LUFTRAUSERS
Shared: Bullet Hell · Pixel Graphics · 2D

Forager
Shared: Pixel Graphics · Survival · 2D

The Escapists
Shared: Pixel Graphics · 2D · Survival

BALL x PIT
Shared: Bullet Hell · Action · Pixel Graphics

ZERO Sievert
Shared: Survival · Pixel Graphics · Shooter

Angel at Dusk
Shared: Bullet Hell · 2D · Pixel Graphics

The Final Station
Shared: Pixel Graphics · Survival · 2D

Nuclear Throne
Shared: Pixel Graphics · Bullet Hell · Action

Death Must Die
Shared: Bullet Hell · Pixel Graphics · 2D

Bloody Hell
Shared: Bullet Hell · Pixel Graphics · Indie

Hotline Miami
Shared: Pixel Graphics · Action · Top-Down

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

Rabi-Ribi
Shared: Bullet Hell · Pixel Graphics · Cute

Exit the Gungeon
Shared: Bullet Hell · Pixel Graphics · Action