Games like Blood Dungeon
Games like Blood Dungeon include Vampire Survivors, Skul: The Hero Slayer, Megabonk, Death Must Die, and Halls of Torment. We matched them by the tags players give Blood Dungeon on Steam (Action Roguelike, Roguelite, Action, Platformer, and 2D): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Action Roguelike · Roguelite · Bullet Hell

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

Megabonk
Shared: Action Roguelike · Roguelite · Action

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

Halls of Torment
Shared: Action Roguelike · Roguelite · Pixel Graphics

Rogue Legacy
Shared: Action Roguelike · Platformer · Action

Dungreed
Shared: Action Roguelike · Roguelite · Action

Dead Cells
Shared: Action Roguelike · Roguelite · 2D

BALL x PIT
Shared: Roguelite · Action · Action Roguelike

BlazBlue Entropy Effect
Shared: Action Roguelike · Action · 2D

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

Boneraiser Minions
Shared: Action Roguelike · Roguelite · Pixel Graphics

Enter the Gungeon
Shared: Action Roguelike · Bullet Hell · Pixel Graphics

UnderMine
Shared: Action Roguelike · Roguelite · Pixel Graphics

Nuclear Throne
Shared: Action Roguelike · Pixel Graphics · Action

The Binding of Isaac: Rebirth
Shared: Action Roguelike · Pixel Graphics · 2D

Tower of Babel: Survivors of Chaos
Shared: Action Roguelike · Roguelite · Action

Broforce
Shared: Action · Pixel Graphics · 2D

ScourgeBringer
Shared: Action · Roguelite · Action Roguelike

Hades
Shared: Action Roguelike · Roguelite · Action

Caveblazers
Shared: Action Roguelike · Roguelite · Platformer

Vagante
Shared: Action Roguelike · Action · Roguelite

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

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