firstly, if you replay mission 2 you have to unlock the control "remote hijack" ability at the cyber core station in your safehouse
. If you play mission 2 the first time, you have this ability automatically.
Before you start (replay) mission 2 on recruit
, make sure you have equip the "remote hijack" ability. Shortly after the beginning your partner use a talon, there is the point for the achievement. Use another talon with your core ability and fly right side to the door and kill 20 enemies here.
if you do this here, you also unlock this achievement within