Death Star 2 6-13 is the thirteenth level of Death Star 2. To pass this level with three stars, you should pop all pigs and score at least 90,000 points.
Send Princess Leia into the outer most part of the bottom atmosphere. As she whips around tractor beam into the ship to pull it down into the atmosphere. If you lucky enough, TNT box n the north side of the level will detonate and make more points, which is the key to get three stars, but it's extremely rare and hard.