Games like Pirates Slayer
Games like Pirates Slayer include Vampire Survivors, Megabonk, Hades, Rogue Legacy 2, and Skul: The Hero Slayer. We matched them by the tags players give Pirates Slayer on Steam (Arena Shooter, Roguelite, Indie, Arcade, and Action-Adventure): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Roguelite · Indie · Arcade

Megabonk
Shared: Roguelite · Indie · Action

Hades
Shared: Roguelite · Indie · Action

Rogue Legacy 2
Shared: Arcade · Indie · Roguelite

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

Brotato
Shared: Arena Shooter · Roguelite · Singleplayer

Nova Drift
Shared: Roguelite · Arena Shooter · Arcade

Yet Another Zombie Survivors
Shared: Roguelite · Indie · Arcade

Haste
Shared: Roguelite · Action · Arcade

Bills Must Be Paid
Shared: Roguelite · Indie · Arcade

SNKRX
Shared: Roguelite · Arena Shooter · Arcade

Timberman
Shared: Indie · Casual · Arcade

BALL x PIT
Shared: Roguelite · Arcade · Action

Goobies
Shared: Roguelite · 3D · Casual

Hamster Hunter
Shared: Arcade · Action-Adventure · 3D

A Dance of Fire and Ice
Shared: Indie · Arcade · Singleplayer

Deep Rock Galactic: Survivor
Shared: Roguelite · Arena Shooter · Arcade

Hitler Waifu
Shared: Arena Shooter · Casual · Action-Adventure

Rogue Legacy
Shared: Indie · Roguelite · Action

MUSYNX
Shared: Indie · Casual · Arcade

Superflight
Shared: Indie · Casual · Action

Noobs Are Coming
Shared: Roguelite · Arena Shooter · Action

Boneraiser Minions
Shared: Roguelite · Indie · Arcade

Hades II
Shared: Roguelite · Action · Indie