Games like Fragile Allegiance
Games like Fragile Allegiance include Stellaris, STAR WARS™ Empire at War - Gold Pack, Homeworld Remastered Collection, FTL: Faster Than Light, and Master of Orion. We matched them by the tags players give Fragile Allegiance on Steam (Strategy, Space, Retro, Classic, and Wargame): closest matches first, and among equally close ones the better-known games.

Stellaris
Shared: Strategy · Space · Sci-fi

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

Homeworld Remastered Collection
Shared: Strategy · Space · Classic

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

Master of Orion
Shared: Strategy · Space · Sci-fi

Master of Orion 2
Shared: Strategy · Space · Classic

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

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

STAR WARS™ Galactic Battlegrounds Saga
Shared: Strategy · Classic · Sci-fi

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

Total Annihilation
Shared: Strategy · Classic · Sci-fi

STAR WARS™ Battlefront II (Classic, 2005)
Shared: Classic · Space · Sci-fi

Battlefleet Gothic: Armada 2
Shared: Strategy · Space · Sci-fi

Command & Conquer Red Alert™ 2 and Yuri’s Revenge™
Shared: Strategy · Classic · Retro

Battlezone 98 Redux
Shared: Strategy · Sci-fi · Classic

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

Battlefleet Gothic: Armada (Classic)
Shared: Strategy · Space · Sci-fi

Homeworld 3
Shared: Space · Strategy · Sci-fi

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

X-COM: UFO Defense
Shared: Strategy · Classic · Sci-fi

Cosmoteer: Starship Architect & Commander
Shared: Space · Sci-fi · Strategy

Nexus - The Jupiter Incident
Shared: Strategy · Space · Sci-fi

Dyson Sphere Program
Shared: Space · Sci-fi · Strategy

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