Games like Stellaris: Federations
Games like Stellaris: Federations include Stellaris, ENDLESS Space™ 2, Distant Worlds 2, Europa Universalis IV, and X4: Foundations. We matched them by the tags players give Stellaris: Federations on Steam (Strategy, Simulation, Space, Sci-fi, and Grand Strategy): closest matches first, and among equally close ones the better-known games.

Stellaris
Shared: Strategy · Space · Sci-fi

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

Distant Worlds 2
Shared: Strategy · Simulation · Space

Europa Universalis IV
Shared: Strategy · Simulation · Grand Strategy

X4: Foundations
Shared: Simulation · Space · Strategy

Galactic Civilizations IV
Shared: Space · Simulation · Strategy

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

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

Distant Worlds: Universe
Shared: Strategy · Space · Simulation

Master of Orion
Shared: Strategy · Space · 4X

Sid Meier’s Civilization® VI
Shared: Strategy · Grand Strategy · 4X

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

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

ENDLESS Space™ - Definitive Edition
Shared: Strategy · Space · Sci-fi

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

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

Sins of a Solar Empire II
Shared: Strategy · Space · Sci-fi

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

Total War: WARHAMMER
Shared: Strategy · Simulation · Grand Strategy

Crusader Kings III
Shared: Strategy · Simulation · Grand Strategy

Starpoint Gemini Warlords
Shared: Space · Strategy · Simulation

Terra Invicta
Shared: Strategy · Simulation · Grand Strategy

Dune: Spice Wars
Shared: Strategy · Sci-fi · Simulation

Manor Lords
Shared: Strategy · Simulation · Grand Strategy