Games like Blastroid
Games like Blastroid include Vampire Survivors, BALL x PIT, Megabonk, Nova Drift, and 20 Minutes Till Dawn. We matched them by the tags players give Blastroid on Steam (Bullet Hell, Roguelite, Space, Shoot 'Em Up, and Action Roguelike): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Bullet Hell · Roguelite · Action Roguelike

BALL x PIT
Shared: Roguelite · Bullet Hell · Action

Megabonk
Shared: Roguelite · Action Roguelike · Bullet Hell

Nova Drift
Shared: Bullet Hell · Roguelite · Shoot 'Em Up

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

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

Boneraiser Minions
Shared: Bullet Hell · Roguelite · Action Roguelike

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

Star of Providence
Shared: Bullet Hell · Roguelite · Shoot 'Em Up

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

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

Rocket Rats
Shared: Bullet Hell · Action Roguelike · Roguelite

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

Planes, Bullets and Vodka
Shared: Bullet Hell · Shoot 'Em Up · Action

Soulstone Survivors
Shared: Roguelite · Bullet Hell · Action Roguelike

Seraph's Last Stand
Shared: Bullet Hell · Action Roguelike · 2D

LUFTRAUSERS
Shared: Bullet Hell · Action · Shoot 'Em Up

I Am Legion: Stand Survivors
Shared: Bullet Hell · Roguelite · Action Roguelike

Bit Blaster XL
Shared: Bullet Hell · Shoot 'Em Up · Action

Nuclear Throne
Shared: Action Roguelike · Bullet Hell · Roguelite

Hades
Shared: Roguelite · Action Roguelike · Action

Dungreed
Shared: Roguelite · Action Roguelike · Action

Brotato
Shared: Bullet Hell · Action Roguelike · Roguelite

Star Saviors
Shared: Bullet Hell · Shoot 'Em Up · Space