Unending Galaxy is a unique mix of space-sim and 4X strategy.

WARNING: Unending Galaxy is an OLD game made for Windows XP systems, back when 32bit apps and 4:3 monitors were still common place. As a result, this game is not very stable on modern systems. I heavily suggest that you check the steam forums, especially the sticky topics before considering making a purchase. UG is no longer under active development.

Explore a vast and dynamic universe in which the different factions conquer new territories, colonize planets, and conduct diplomacy. Start as a simple pilot and amass wealth through trading, mining, and fighting. Turn this wealth into new stations and warships that you will use to carve the frontiers of your own empire. Or do none of that and become a powerful pirate and war profiteer by turning other factions against one another.

• Multiple maps featuring hundreds of sectors and thousands of NPC
  
• Includes multiple hand-crafted maps and a procedural map generator
  
• Sandbox gameplay: mine, trade, build, colonize, fight, destroy, scavenge
  
• Control multiple ships and switch between them at will
  
• 10 factions, 90 ships and 70 station types, dozens of weapons
  
• No in-game loading screens, real time gameplay with active pause
  
• Powerful modding toolkit included