Games like Slayers, Inc.
Games like Slayers, Inc. include Vampire Survivors, Enter the Gungeon, Megabonk, Halls of Torment, and Nuclear Throne. We matched them by the tags players give Slayers, Inc. on Steam (Action Roguelike, Roguelike, Twin Stick Shooter, Bullet Hell, and Pixel Graphics): closest matches first, and among equally close ones the better-known games.

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

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

Megabonk
Shared: Action Roguelike · Roguelike · Bullet Hell

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

Nuclear Throne
Shared: Action Roguelike · Roguelike · Pixel Graphics

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

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

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

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

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

Hero Siege
Shared: Action Roguelike · Pixel Graphics · Roguelike

Brotato
Shared: Roguelike · Action Roguelike · Bullet Hell

Dungreed
Shared: Action Roguelike · Roguelike · Pixel Graphics

Rogue Legacy
Shared: Roguelike · Action Roguelike · Singleplayer

Atomicrops
Shared: Roguelike · Bullet Hell · Action Roguelike

Dead Cells
Shared: Roguelike · Action Roguelike · Pixel Graphics

The Binding of Isaac
Shared: Action Roguelike · Roguelike · Top-Down

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

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

Sephiria
Shared: Action Roguelike · Roguelike · Pixel Graphics

Hades
Shared: Action Roguelike · Roguelike · Action

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

Rogue: Genesia
Shared: Action Roguelike · Bullet Hell · Twin Stick Shooter

Soulstone Survivors
Shared: Action Roguelike · Bullet Hell · Roguelike