Games like Be a Pirate!
Games like Be a Pirate! include Creeper World 4, Age of Mythology: Retold, Bloons TD 6, Artisan TD, and Minimalist Tower Defense. We matched them by the tags players give Be a Pirate! on Steam (Strategy, Tower Defense, Pirates, Story Rich, and Real Time Tactics): closest matches first, and among equally close ones the better-known games.

Creeper World 4
Shared: Tower Defense · Real Time Tactics · Strategy

Age of Mythology: Retold
Shared: Strategy · Story Rich · Lore-Rich

Bloons TD 6
Shared: Strategy · Tower Defense · Singleplayer

Artisan TD
Shared: Strategy · Tower Defense · Real Time Tactics

Minimalist Tower Defense
Shared: Strategy · Tower Defense · Real Time Tactics

Plants vs. Zombies GOTY Edition
Shared: Tower Defense · Strategy · Singleplayer

Kingdom Two Crowns
Shared: Tower Defense · Strategy · Building

Stronghold Crusader: Definitive Edition
Shared: Strategy · Real Time Tactics · Tower Defense

Company of Heroes 3
Shared: Strategy · Singleplayer · Real Time Tactics

Element TD 2 - Tower Defense
Shared: Tower Defense · Strategy · Real Time Tactics

Kingdom Rush 5: Alliance TD
Shared: Strategy · Tower Defense · Singleplayer

Kingdom Rush Origins - Tower Defense
Shared: Strategy · Tower Defense · Singleplayer

Mindustry
Shared: Tower Defense · Strategy · Building

Dungeon Defenders
Shared: Tower Defense · Strategy · Singleplayer

Dungeon Warfare 3
Shared: Strategy · Tower Defense · Building

Kingdom Rush Frontiers - Tower Defense
Shared: Strategy · Tower Defense · Singleplayer

Stronghold: Definitive Edition
Shared: Strategy · Real Time Tactics · Building

Thronefall
Shared: Strategy · Tower Defense · Building

Call to Arms - Gates of Hell: Ostfront
Shared: Strategy · Real Time Tactics · Singleplayer

GemCraft - Chasing Shadows
Shared: Strategy · Tower Defense · Top-Down

Aliens: Dark Descent
Shared: Strategy · Real Time Tactics · Top-Down

Sultan's Game
Shared: Strategy · Story Rich · Singleplayer

Dungeon Warfare
Shared: Strategy · Tower Defense · Top-Down

Kingdom Rush - Tower Defense
Shared: Strategy · Tower Defense · Singleplayer