Destroy All Humans Path of the Furon

Shen Long - Unleash the Tornadotron to throw tons of shipyard crates in the air. when you unlock the Tornadotron you will be in the right spot to get this achievement simple select the tornadotron and use it on the buildings until the DAHM pops up.
( This video is mine i created it and i hope it helps!!) the video below shows you how to get all the DAHM achievements

on one of the levels u are asked to destroy a ship yard, at that point u are given the tornado gun, just use it and guide it through a lot of the crates and u will get the achievement!