Games like Slay The Hero
Games like Slay The Hero include Vampire Survivors, Megabonk, Skul: The Hero Slayer, Death Must Die, and Hades. We matched them by the tags players give Slay The Hero on Steam (Action Roguelike, Indie, Auto Battler, Bullet Hell, and Roguelite): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Action Roguelike · Bullet Hell · Roguelite

Megabonk
Shared: Action Roguelike · Indie · Roguelite

Skul: The Hero Slayer
Shared: Indie · Action Roguelike · Action

Death Must Die
Shared: Action Roguelike · Bullet Hell · Roguelite

Hades
Shared: Action Roguelike · Indie · Roguelite

Enter the Gungeon
Shared: Action Roguelike · Bullet Hell · Indie

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

The Binding of Isaac: Rebirth
Shared: Action Roguelike · Indie · Roguelike

Boneraiser Minions
Shared: Action Roguelike · Bullet Hell · Roguelite

Nuclear Throne
Shared: Action Roguelike · Indie · Bullet Hell

Rogue Legacy
Shared: Indie · Action Roguelike · Roguelike

BALL x PIT
Shared: Roguelite · Action Roguelike · Action

Brotato
Shared: Action Roguelike · Bullet Hell · Roguelike

Dungreed
Shared: Action Roguelike · Indie · Roguelite

Soulstone Survivors
Shared: Action Roguelike · Bullet Hell · Roguelite

Risk of Rain (2013)
Shared: Action Roguelike · Indie · Roguelike

Noobs Want to Live
Shared: Bullet Hell · Action Roguelike · Action

Star of Providence
Shared: Action Roguelike · Bullet Hell · Roguelite

20 Minutes Till Dawn
Shared: Action Roguelike · Bullet Hell · Roguelite

Rocket Rats
Shared: Action Roguelike · Bullet Hell · Roguelite

Atomicrops
Shared: Bullet Hell · Action Roguelike · Action

Dead Cells
Shared: Action Roguelike · Roguelike · Roguelite

Asgard's Fall — Viking Survivors
Shared: Action Roguelike · Bullet Hell · Roguelite

Astro Prospector
Shared: Action Roguelike · Roguelite · Bullet Hell