Games like BloodDome99
Games like BloodDome99 include Vampire Survivors, Megabonk, BALL x PIT, Brotato, and Halls of Torment. We matched them by the tags players give BloodDome99 on Steam (Bullet Heaven, Action Roguelike, Bullet Hell, Pixel Graphics, and 1980s): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Action Roguelike · Bullet Hell · Pixel Graphics

Megabonk
Shared: Bullet Heaven · Action Roguelike · Bullet Hell

BALL x PIT
Shared: Bullet Hell · Action Roguelike · Roguelite

Brotato
Shared: Bullet Hell · Action Roguelike · Bullet Heaven

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

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

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

Boneraiser Minions
Shared: Action Roguelike · Bullet Hell · Pixel Graphics

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

Nuclear Throne
Shared: Action Roguelike · Pixel Graphics · Bullet Hell

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

Soulstone Survivors
Shared: Bullet Heaven · Action Roguelike · Bullet Hell

Nova Drift
Shared: Bullet Hell · Action Roguelike · Roguelite

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

Time Wasters
Shared: Bullet Heaven · Action Roguelike · Bullet Hell

Yet Another Zombie Survivors
Shared: Bullet Heaven · Action Roguelike · Roguelite

Karate Survivor
Shared: Bullet Heaven · Action Roguelike · Bullet Hell

The Spell Brigade
Shared: Bullet Heaven · Bullet Hell · Action Roguelike

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

Tower of Babel: Survivors of Chaos
Shared: Bullet Heaven · Action Roguelike · Bullet Hell

Atomicrops
Shared: Bullet Hell · Action Roguelike · Pixel Graphics

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

Realm of the Mad God Exalt
Shared: Pixel Graphics · Bullet Hell · Action Roguelike

NIMRODS
Shared: Bullet Heaven · Action Roguelike · Bullet Hell