Games like Galaxy Union
Games like Galaxy Union include Stellaris, ENDLESS Space™ 2, Master of Orion, Sid Meier's Civilization®: Beyond Earth™, and Sins of a Solar Empire II. We matched them by the tags players give Galaxy Union on Steam (Strategy, 4X, and Space): closest matches first, and among equally close ones the better-known games.
Stellaris
Shared: Strategy · Space · 4X
ENDLESS Space™ 2
Shared: Strategy · Space · 4X
Master of Orion
Shared: Strategy · 4X · Space
Sid Meier's Civilization®: Beyond Earth™
Shared: Strategy · Space · 4X
Sins of a Solar Empire II
Shared: Strategy · Space · 4X
ENDLESS Space™ - Definitive Edition
Shared: Strategy · 4X · Space
X4: Foundations
Shared: Space · 4X · Strategy
STAR WARS™ Empire at War - Gold Pack
Shared: Strategy · Space · 4X
Distant Worlds 2
Shared: Strategy · 4X · Space
Sid Meier’s Civilization® VI
Shared: Strategy · 4X
Master of Orion 2
Shared: Strategy · 4X · Space
Distant Worlds: Universe
Shared: Strategy · 4X · Space
Sid Meier's Civilization® V
Shared: Strategy · 4X
Europa Universalis IV
Shared: Strategy · 4X
StarDrive 2
Shared: Strategy · Space · 4X
FTL: Faster Than Light
Shared: Strategy · Space
StarDrive
Shared: Strategy · 4X · Space
Galactic Civilizations IV
Shared: Space · 4X · Strategy
Anno 2205™
Shared: Strategy · 4X · Space
Sid Meier's Civilization VII
Shared: Strategy · 4X
Age of Wonders: Planetfall
Shared: Strategy · 4X · Space
Sid Meier's Starships
Shared: Strategy · Space · 4X
Starpoint Gemini Warlords
Shared: Space · Strategy · 4X
HUMANKIND™
Shared: Strategy · 4X