Instructions
Approach an enemy while playing as either Starkiller or Darth Vader.
Press the "A" button on your Xbox 360 controller to jump into the air.
Press and hold the "X" button on your controller to slam down into the enemy. This attack is called the "leaping slam." A message displaying "leaping slam" will appear on your screen if you have done the move correctly.
Repeat this attack on 100 different enemies to unlock the "Launched" aerial ambush juggle combo achievement.