Games like Gratuitous Space Battles 2
Games like Gratuitous Space Battles 2 include Stellaris, FTL: Faster Than Light, Kerbal Space Program, STAR WARS™ Empire at War - Gold Pack, and Game Dev Tycoon. We matched them by the tags players give Gratuitous Space Battles 2 on Steam (Strategy, Simulation, Indie, Space, and Sci-fi): closest matches first, and among equally close ones the better-known games.

Stellaris
Shared: Strategy · Space · Sci-fi

FTL: Faster Than Light
Shared: Strategy · Space · Indie

Kerbal Space Program
Shared: Simulation · Space · Indie

STAR WARS™ Empire at War - Gold Pack
Shared: Strategy · Space · Sci-fi

Game Dev Tycoon
Shared: Simulation · Strategy · Indie

Homeworld Remastered Collection
Shared: Strategy · Space · Sci-fi

X4: Foundations
Shared: Simulation · Space · Strategy

ENDLESS Space™ 2
Shared: Strategy · Space · Sci-fi

Spacebase DF-9
Shared: Simulation · Space · Strategy

RimWorld
Shared: Strategy · Simulation · Moddable

Particle Fleet: Emergence
Shared: Strategy · Simulation · Indie

Cosmoteer: Starship Architect & Commander
Shared: Sci-fi · Space · Strategy

Hardspace: Shipbreaker
Shared: Simulation · Space · Sci-fi

ENDLESS Space™ - Definitive Edition
Shared: Strategy · Space · Sci-fi

Starpoint Gemini Warlords
Shared: Strategy · Space · Simulation

Plague Inc: Evolved
Shared: Strategy · Simulation · Indie

Dyson Sphere Program
Shared: Space · Simulation · Sci-fi

X Rebirth
Shared: Simulation · Space · Sci-fi

Nexus - The Jupiter Incident
Shared: Strategy · Simulation · Space

Space Pirates And Zombies 2
Shared: Strategy · Space · Indie

Rebel Galaxy
Shared: Space · Sci-fi · Great Soundtrack

Distant Worlds: Universe
Shared: Strategy · Space · Simulation

House of the Dying Sun
Shared: Simulation · Indie · Space

X3: Terran Conflict
Shared: Simulation · Space · Strategy