Crisis of the Confederation is a total conversion mod for Crusader Kings II, allowing the player to take the role of a military officer, politician, or crime lord amidst the chaotic political upheavals of the 31st century. It is set in an original science-fiction setting inspired by Fading Suns, Warhammer 40,000, Dune, and Foundation.
I'd personally like to see more spacing between planets, with sea as space in between. Also a more solar-system feel.