Galactic Civilizations II: Dark Avatar expansion

The most intriguing of these additions is the ability for players not only to custom-craft their own faction's looks and ship designs, but also to do the same for their enemies. The in-game ship editor is versatile and detailed enough for players to set up sci-fi showdowns between titanic franchises like Star Wars vs. Star Trek or Babylon 5 vs. Battlestar Galactica.