Games like Galactic Ruler
Games like Galactic Ruler include Stellaris, No Man's Sky, FTL: Faster Than Light, STAR WARS™ Empire at War - Gold Pack, and Battlefleet Gothic: Armada 2. We matched them by the tags players give Galactic Ruler on Steam (Real Time Tactics, Procedural Generation, Space, Aliens, and 4X): closest matches first, and among equally close ones the better-known games.
Stellaris
Shared: Space · 4X · Grand Strategy
No Man's Sky
Shared: Space · Procedural Generation · Sci-fi
FTL: Faster Than Light
Shared: Space · Sci-fi · Procedural Generation
STAR WARS™ Empire at War - Gold Pack
Shared: Space · Sci-fi · RTS
Battlefleet Gothic: Armada 2
Shared: Real Time Tactics · Space · Co-op
Elite Dangerous
Shared: Space · Space Sim · Sci-fi
Sins of a Solar Empire II
Shared: Space · 4X · Co-op
ENDLESS Space™ 2
Shared: Space · 4X · Sci-fi
Planetary Annihilation: TITANS
Shared: Real Time Tactics · Co-op · RTS
X4: Foundations
Shared: Space · Space Sim · 4X
Distant Worlds 2
Shared: Space · 4X · Grand Strategy
Sid Meier's Civilization®: Beyond Earth™
Shared: Space · 4X · Sci-fi
Galactic Civilizations III
Shared: Aliens · 4X · Sci-fi
Cosmoteer: Starship Architect & Commander
Shared: Space · Sci-fi · Singleplayer
Dune: Spice Wars
Shared: Real Time Tactics · 4X · Sci-fi
Sins of a Solar Empire®: Rebellion
Shared: Space · 4X · Singleplayer
Empyrion - Galactic Survival
Shared: Co-op · Space · Space Sim
Supreme Commander: Forged Alliance
Shared: Co-op · Sci-fi · Grand Strategy
Master of Orion
Shared: Space · 4X · Sci-fi
Galactic Civilizations IV
Shared: Space · 4X · Grand Strategy
Battlefleet Gothic: Armada (Classic)
Shared: Space · Real Time Tactics · Sci-fi
ENDLESS Space™ - Definitive Edition
Shared: Space · 4X · Sci-fi
Kerbal Space Program
Shared: Space · Space Sim · Simulation
Total War: WARHAMMER
Shared: 4X · Real Time Tactics · Grand Strategy