Der Geist Achievement
Achieve 250 ghost kills.This may be earned through natural progression. A ‘ghost kill’ is a kill performed when the enemy is completely unaware or suspicious (yellow) but not alerted (red). Killing enemies by any means in this state will result in a ghost kill.
Most of the time you can walk up on unsuspecting enemies and melee kill them. Even if they are facing you, as long as their awareness doesn’t turn red, it should register as a ghost kill. If you find yourself in an area where you need to shoot a weapon, try using your suppressed pistol; if you kill an enemy and another finds them, unless they see you, killing that second enemy will also be a ghost kill. As long as you are not in full-fledged combat, you should be safe.
Refer to the ‘Mop Up’ section in the roadmap for a farming method to make this go a lot quicker.
To check your progress, press then navigate to Service Record > Medals > General and look under the ‘Combat’ heading to see your medal progress.