Maybe it is harder depending on the difficulty you choose. On easy it is super simple. You don't have to throw back 2 missles or hide behind poles. When you kill the last trooper be sure to be hiding behind the TIE. When the AT-MP spawns it will not even see you, so it will not fire at you. Force grip the TIE while still hiding behind it, line up your shot, throw and boom. One shot and cheevo popped.