The (specifically the v3.5.3 "Fornax" update) combines the core grand strategy experience with exclusive collector's content and significant gameplay refinements focused on AI and balance. Galaxy Edition Exclusive Content
The v3.5.3 patch focuses on streamlining the mid-to-late game and improving the competitive nature of AI empires. So what is the difference between the editions?
Exclusive forum avatars, a galaxy forum icon, and a signed desktop wallpaper. Key Features of v3.5.3 (Fornax Update)
Adds a unique arachnid species portrait for your empire.