Design and build a ship capable of flighing fast, 15Km/s and up and do a reentry on Kerbin with that speed. Some trouble you might run into. -exiting the system.(star system!) -lack of fuel effcient motors. -lack of fuel. Some piece of advice, use gravity to your advantage. Allowed mods. -Kerbal Engineer Goal of this. Watching a ship burn up in the stratosphere when the developers implemented it. Untill then enjoy the long burn up from drag.