Games like Ruiga Pirates
Games like Ruiga Pirates include Vampire Survivors, 20 Minutes Till Dawn, Death Must Die, Megabonk, and Halls of Torment. We matched them by the tags players give Ruiga Pirates on Steam (Action Roguelike, Bullet Hell, Pixel Graphics, Shoot 'Em Up, and Hack and Slash): closest matches first, and among equally close ones the better-known games.

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

20 Minutes Till Dawn
Shared: Action Roguelike · Bullet Hell · Shoot 'Em Up

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

Megabonk
Shared: Action Roguelike · Bullet Hell · Pixel Graphics

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

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

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

Hero Siege
Shared: Pixel Graphics · Action Roguelike · Hack and Slash

Hades
Shared: Action Roguelike · Hack and Slash · Action

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

Brotato
Shared: Bullet Hell · Action Roguelike · Singleplayer

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

Noobs Want to Live
Shared: Bullet Hell · Pixel Graphics · Action Roguelike

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

Soulstone Survivors
Shared: Action Roguelike · Bullet Hell · Hack and Slash

I Am Legion: Stand Survivors
Shared: Action Roguelike · Bullet Hell · Shoot 'Em Up

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

Rocket Rats
Shared: Action Roguelike · Bullet Hell · Pixel Graphics

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

Furi
Shared: Bullet Hell · Hack and Slash · Shoot 'Em Up

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

The Void Rains Upon Her Heart
Shared: Action Roguelike · Bullet Hell · Shoot 'Em Up

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

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