Games like BLOODSAINT 2
Games like BLOODSAINT 2 include Vampire Survivors, BALL x PIT, Halls of Torment, Megabonk, and Nuclear Throne. We matched them by the tags players give BLOODSAINT 2 on Steam (Action, Rock Music, Fast-Paced, Arcade, and Bullet Hell): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Bullet Hell · Action Roguelike · 2D

BALL x PIT
Shared: Action · Arcade · Bullet Hell

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

Megabonk
Shared: Roguelike · Action Roguelike · Action

Nuclear Throne
Shared: Roguelike · Action · Action Roguelike

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

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

UBERMOSH:BLACK
Shared: Action · Fast-Paced · Arcade

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

Brotato
Shared: Roguelike · Bullet Hell · Action Roguelike

Boneraiser Minions
Shared: Bullet Hell · Action Roguelike · 2D

Dungreed
Shared: Action · Roguelike · Action Roguelike

Nova Drift
Shared: Bullet Hell · Arcade · Action Roguelike

Rogue Legacy
Shared: Action · Roguelike · Action Roguelike

Dead Cells
Shared: Roguelike · Action Roguelike · 2D

UBERMOSH Vol.3
Shared: Action · Fast-Paced · Arcade

Deep Rock Galactic: Survivor
Shared: Bullet Hell · Action Roguelike · Action

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

UBERMOSH
Shared: Action · Arcade · Fast-Paced

Atomicrops
Shared: Action · Bullet Hell · Roguelike

Hades
Shared: Action · Action Roguelike · Roguelike

Rogue: Genesia
Shared: Bullet Hell · Arcade · Action Roguelike

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

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