Games like Space Pirate King
Games like Space Pirate King include Warhammer 40,000: Space Marine 2, ARMORED CORE™ VI FIRES OF RUBICON™, PRAGMATA, Grand Theft Auto V Legacy, and Mecha BREAK. We matched them by the tags players give Space Pirate King on Steam (Action, Shoot 'Em Up, Sci-fi, Wargame, and Space Sim): closest matches first, and among equally close ones the better-known games.

Warhammer 40,000: Space Marine 2
Shared: Action · Sci-fi · Wargame

ARMORED CORE™ VI FIRES OF RUBICON™
Shared: Action · Sci-fi · Mechs

PRAGMATA
Shared: Action · Sci-fi · Robots

Grand Theft Auto V Legacy
Shared: Action · Automobile Sim · Third Person

Mecha BREAK
Shared: Action · Sci-fi · Mechs

The Callisto Protocol™
Shared: Sci-fi · Action · Third Person

Predecessor
Shared: Action · Sci-fi · Third Person

Elite Dangerous
Shared: Space Sim · Sci-fi · Action

Mechabellum
Shared: Wargame · Mechs · Sci-fi

HELLDIVERS™ 2
Shared: Action · Sci-fi · Third Person

Starship Troopers: Extermination
Shared: Action · Sci-fi · Wargame

Avorion
Shared: Space Sim · Sci-fi · Action

Dead Space (2008)
Shared: Action · Sci-fi · Third Person

BattleTech
Shared: Sci-fi · Action · Mechs

STAR WARS Jedi: Survivor™
Shared: Action · Sci-fi · Third Person

Detroit: Become Human
Shared: Sci-fi · Cinematic · Action

Quantum Break
Shared: Action · Sci-fi · Third Person

Vanquish
Shared: Action · Sci-fi · Third Person

STAR WARS™ Battlefront II (Classic, 2005)
Shared: Action · Sci-fi · Space

EVERSPACE™
Shared: Action · Sci-fi · Space Sim

Deliver Us The Moon
Shared: Action · Sci-fi · Space Sim

METAL GEAR RISING: REVENGEANCE
Shared: Action · Spectacle fighter · Third Person

Chorus
Shared: Action · Sci-fi · Space Sim

Grand Theft Auto IV: The Complete Edition
Shared: Action · Automobile Sim · Third Person