Stellaris's Utopia expansion adds Dyson Spheres, ringworlds, and a transdimensional breach

Stellaris is the best flawed game I played in 2016. There was so much potential in Paradox's spacefaring grand strategy game, whether you were looking for Star Trek or Star Wars or Babylon 5 or Battlestar Galactica or some other science fiction icon. Stellaris had the seeds of all of them. Every system felt a bit underdeveloped, and the late-game especially became a chore--there wasn't enough to do, nor anything to really see. The galaxy discovered, your neighboring empires entrenched, your own empire consolidated.