Games like Galactic Ruler Enlightenment
Games like Galactic Ruler Enlightenment include Stellaris, Sid Meier's Civilization®: Beyond Earth™, Europa Universalis IV, X4: Foundations, and Galactic Civilizations IV. We matched them by the tags players give Galactic Ruler Enlightenment on Steam (Simulation, Strategy, Space, Grand Strategy, and Sci-fi): closest matches first, and among equally close ones the better-known games.

Stellaris
Shared: Strategy · Space · Grand Strategy

Sid Meier's Civilization®: Beyond Earth™
Shared: Strategy · Space · Sci-fi

Europa Universalis IV
Shared: Strategy · Simulation · Grand Strategy

X4: Foundations
Shared: Simulation · Space · Strategy

Galactic Civilizations IV
Shared: Simulation · Space · Grand Strategy

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

Galactic Civilizations III
Shared: Sci-fi · 4X · Aliens

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

Sid Meier’s Civilization® VI
Shared: Strategy · Grand Strategy · Simulation

Sid Meier's Civilization VII
Shared: Strategy · Grand Strategy · Simulation

ENDLESS Space™ - Definitive Edition
Shared: Strategy · Space · 4X

Distant Worlds 2
Shared: Simulation · Strategy · Grand Strategy

Sins of a Solar Empire®: Rebellion
Shared: Simulation · Space · Strategy

Crusader Kings II
Shared: Strategy · Grand Strategy · Simulation

Master of Orion
Shared: Strategy · Space · 4X

NEBULOUS: Fleet Command
Shared: Simulation · Strategy · Grand Strategy

Anno 2205™
Shared: Strategy · Simulation · Sci-fi

Distant Worlds: Universe
Shared: Strategy · Space · Simulation

Kerbal Space Program
Shared: Simulation · Space · Moddable

Sid Meier's Civilization® V
Shared: Strategy · 4X · Grand Strategy

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

Victoria 3
Shared: Simulation · Strategy · Grand Strategy

Rebel Inc: Escalation
Shared: Simulation · Strategy · Grand Strategy

Europa Universalis V
Shared: Strategy · Simulation · Grand Strategy