Games like Gratuitous Space Battles
Games like Gratuitous Space Battles include FTL: Faster Than Light, Stellaris, Cosmoteer: Starship Architect & Commander, Reassembly, and Kerbal Space Program. We matched them by the tags players give Gratuitous Space Battles on Steam (Strategy, Auto Battler, Space, Top-Down, and Sci-fi): closest matches first, and among equally close ones the better-known games.

FTL: Faster Than Light
Shared: Strategy · Space · Sci-fi

Stellaris
Shared: Strategy · Space · Sci-fi

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

Reassembly
Shared: Space · Strategy · Sandbox

Kerbal Space Program
Shared: Space · Sandbox · Simulation

Prison Architect
Shared: Strategy · Sandbox · Building

Oxygen Not Included
Shared: Strategy · Building · Sandbox

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

Space Engineers
Shared: Space · Sandbox · Building

RimWorld
Shared: Strategy · Sandbox · Sci-fi

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

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

Spacebase DF-9
Shared: Space · Strategy · Sci-fi

Heat Signature
Shared: Space · Top-Down · Strategy

Space Pirates and Zombies
Shared: Space · Strategy · Top-Down

Door Kickers
Shared: Strategy · Top-Down · Indie

Cities: Skylines
Shared: Strategy · Sandbox · Building

Space Engineers 2
Shared: Space · Sandbox · Sci-fi

Jurassic World Evolution
Shared: Strategy · Building · Sandbox

X4: Foundations
Shared: Space · Strategy · Sandbox

Game Dev Tycoon
Shared: Strategy · Indie · Simulation

Starpoint Gemini Warlords
Shared: Space · Strategy · Sci-fi

Mount & Blade II: Bannerlord
Shared: Strategy · Sandbox · Singleplayer

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