Games like Stellar Empires
Games like Stellar Empires include STAR WARS™ Empire at War - Gold Pack, Cossacks 3, Warhammer 40,000: Dawn of War III, Mount & Blade II: Bannerlord, and Total War: WARHAMMER II. We matched them by the tags players give Stellar Empires on Steam (Indie, Strategy, Action, RTS, and Singleplayer): closest matches first, and among equally close ones the better-known games.

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

Cossacks 3
Shared: Strategy · RTS · Multiplayer

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

Mount & Blade II: Bannerlord
Shared: Strategy · Multiplayer · Action

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

Tempest Rising
Shared: Strategy · RTS · Singleplayer

Company of Heroes 3
Shared: Strategy · Singleplayer · RTS

Planetary Annihilation: TITANS
Shared: Strategy · RTS · Singleplayer

Company of Heroes 2
Shared: Strategy · RTS · Multiplayer

Warhammer 40,000: Space Marine 2
Shared: Action · Multiplayer · PvE

Call to Arms
Shared: Strategy · Action · RTS

Halo Wars: Definitive Edition
Shared: Strategy · RTS · Singleplayer

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

Warhammer 40,000: Dawn of War - Definitive Edition
Shared: Strategy · RTS · Singleplayer

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

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

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

ENDLESS Space™ 2
Shared: Strategy · Space · Multiplayer

Men of War: Assault Squad 2
Shared: Strategy · RTS · Action

Command & Conquer 3 Tiberium Wars™
Shared: Strategy · RTS · Action

STAR WARS™ Galactic Battlegrounds Saga
Shared: Strategy · Action · RTS

Warhammer 40,000: Dawn of War - Anniversary Edition (Classic)
Shared: Strategy · RTS · Multiplayer

Call to Arms - Gates of Hell: Ostfront
Shared: Strategy · RTS · Singleplayer