"You can get this in Chapter 3 of A New Hope. Right after you build the AT-ST, destroy the gate that is closest to the door you came into this area. Once you do that go back and get your landspeeder. Then take it into that newly opened area and take into the area that has the billboard. And it will go into a cut scene and will give you a bunch of Studs and the achievement." --- . from xbox360achievements.org .