Games like The Black King
Games like The Black King include Hades, Skul: The Hero Slayer, Hades II, Megabonk, and The Binding of Isaac: Rebirth. We matched them by the tags players give The Black King on Steam (Action, Roguelike, Indie, Action Roguelike, and Stylized): closest matches first, and among equally close ones the better-known games.

Hades
Shared: Action Roguelike · Indie · Action

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

Hades II
Shared: Action · Roguelike · Action Roguelike

Megabonk
Shared: Roguelike · Action Roguelike · Indie

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

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

Ravenswatch
Shared: Roguelike · Action · Action Roguelike

Halls of Torment
Shared: Action Roguelike · Roguelike · Action

Vampire Survivors
Shared: Action Roguelike · Indie · Roguelike

Dead Cells
Shared: Roguelike · Action Roguelike · Hack and Slash

Mortal Sin
Shared: Action Roguelike · Action · Indie

Rogue Legacy
Shared: Roguelike · Indie · Action

Brotato
Shared: Roguelike · Action Roguelike · Singleplayer

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

Soulstone Survivors
Shared: Action Roguelike · Roguelike · Action

Risk of Rain 2
Shared: Action Roguelike · Roguelike · Action

Death Must Die
Shared: Action Roguelike · Action · Roguelike

VOIN
Shared: Action · Action Roguelike · Hack and Slash

Nuclear Throne
Shared: Roguelike · Action Roguelike · Indie

Dungreed
Shared: Roguelike · Action Roguelike · Action

Have a Nice Death
Shared: Action Roguelike · Action · Hack and Slash

Cinderia
Shared: Action Roguelike · Roguelike · Action

Enter the Gungeon
Shared: Roguelike · Action Roguelike · Indie

Curse of the Dead Gods
Shared: Action Roguelike · Action · Dark Fantasy