Games like Battle for Orion 2
Games like Battle for Orion 2 include FTL: Faster Than Light, STAR WARS™ Empire at War - Gold Pack, Battlefleet Gothic: Armada 2, Particle Fleet: Emergence, and AI War: Fleet Command. We matched them by the tags players give Battle for Orion 2 on Steam (Strategy, Indie, RTS, and Space): closest matches first, and among equally close ones the better-known games.

FTL: Faster Than Light
Shared: Strategy · Space · Indie

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

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

Particle Fleet: Emergence
Shared: Strategy · Indie · Space

AI War: Fleet Command
Shared: Strategy · RTS · Indie

Homeworld Remastered Collection
Shared: Strategy · Space · RTS

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

StarDrive
Shared: Strategy · Indie · Space

Crying Suns
Shared: Strategy · Indie · Space

Homeworld 3
Shared: Strategy · RTS · Space

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

Rusted Warfare - RTS
Shared: Strategy · RTS · Indie

Circle Empires
Shared: Strategy · Indie · RTS

Nexus - The Jupiter Incident
Shared: Strategy · Space · RTS

Wargame: Red Dragon
Shared: Strategy · RTS · Indie

Natural Selection 2
Shared: Strategy · RTS · Indie

Planetary Annihilation: TITANS
Shared: Strategy · RTS · Space

Creeper World 3: Arc Eternal
Shared: Strategy · Indie · RTS

Stellaris
Shared: Strategy · Space

Iron Marines
Shared: Strategy · RTS · Indie

Heat Signature
Shared: Indie · Space · Strategy

Tooth and Tail
Shared: Strategy · RTS · Indie

Star Ruler 2
Shared: Strategy · Space · RTS

Age of Empires II (Retired)
Shared: Strategy · RTS