Games like Starpoint Gemini Warlords
Games like Starpoint Gemini Warlords include X4: Foundations, Stellaris, Mount & Blade II: Bannerlord, Elite Dangerous, and Starfield. We matched them by the tags players give Starpoint Gemini Warlords on Steam (Space, RPG, Open World, Strategy, and Simulation): closest matches first, and among equally close ones the better-known games.

X4: Foundations
Shared: Space · Open World · Simulation

Stellaris
Shared: Space · Strategy · Sci-fi

Mount & Blade II: Bannerlord
Shared: Open World · RPG · Strategy

Elite Dangerous
Shared: Space · Open World · Space Sim

Starfield
Shared: Space · Open World · RPG

Kerbal Space Program
Shared: Space · Simulation · Space Sim

Dyson Sphere Program
Shared: Space · Open World · Simulation

Starpoint Gemini 2
Shared: Space · RPG · Open World

Rebel Galaxy
Shared: Space · Open World · RPG

Space Engineers
Shared: Space · Simulation · Open World

Mount & Blade: Warband
Shared: RPG · Open World · Strategy

X Rebirth
Shared: Space · Simulation · Sci-fi

RimWorld
Shared: Strategy · Simulation · Base Building

No Man's Sky
Shared: Space · Open World · Sci-fi

Kenshi
Shared: Open World · RPG · Sandbox

Between the Stars
Shared: Space · RPG · Simulation

Endless Sky
Shared: Space · Open World · Sci-fi

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

Space Rangers HD: A War Apart
Shared: Space · RPG · Strategy

X3: Terran Conflict
Shared: Space · Simulation · Strategy

SPORE™
Shared: Open World · Space · Simulation

The Scroll of Taiwu : Beyond The Dome
Shared: RPG · Open World · Strategy

SPORE™ Galactic Adventures
Shared: Space · Simulation · Open World

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