Games like Relentless Expanse
Games like Relentless Expanse include STAR WARS™ Empire at War - Gold Pack, Stellaris, Battlefleet Gothic: Armada 2, Planetary Annihilation: TITANS, and Total War: WARHAMMER III. We matched them by the tags players give Relentless Expanse on Steam (Strategy, RTS, Multiplayer, Sci-fi, and Space): closest matches first, and among equally close ones the better-known games.

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

Stellaris
Shared: Strategy · Space · Sci-fi

Battlefleet Gothic: Armada 2
Shared: Strategy · RTS · Space

Planetary Annihilation: TITANS
Shared: Strategy · RTS · Multiplayer

Total War: WARHAMMER III
Shared: Strategy · RTS · Grand Strategy

Total War: WARHAMMER II
Shared: Strategy · RTS · Multiplayer

Total War: THREE KINGDOMS
Shared: Strategy · RTS · Grand Strategy

Battlefleet Gothic: Armada (Classic)
Shared: Strategy · RTS · Space

Total War: ROME II - Emperor Edition
Shared: Strategy · Grand Strategy · Multiplayer

Hearts of Iron IV
Shared: Strategy · Grand Strategy · Multiplayer

Total War: ATTILA
Shared: Strategy · RTS · Grand Strategy

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

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

Sins of a Solar Empire II
Shared: Strategy · RTS · Space

Sins of a Solar Empire®: Rebellion
Shared: Multiplayer · Strategy · RTS

Warhammer 40,000: Dawn of War III
Shared: Strategy · RTS · Multiplayer

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

Homeworld 3
Shared: RTS · Strategy · Space

Supreme Commander: Forged Alliance
Shared: Strategy · RTS · Multiplayer

Aliens: Dark Descent
Shared: Strategy · RTS · Sci-fi

Total War: EMPIRE – Definitive Edition
Shared: Strategy · Grand Strategy · RTS

Company of Heroes 2
Shared: Strategy · RTS · Multiplayer

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

Total War: NAPOLEON – Definitive Edition
Shared: Strategy · RTS · Grand Strategy

