You Gotta Shoot 'Em in the Head

 is a Fallout 3 quest. It is also an Xbox 360 and PC achievement.

Objectives and walkthrough
Mister Crowley, a resident of Underworld tasks you with finding and killing Dave from the republic of Dave, Ted Strayer, Dukov, and Allistair Tenpenny. He askes you to do this because they are Ghoul bigots. If you manage to succefuly persuade Ahzrukhal, you can find out through a short chat with Mister Crowley that what he really wants is the keys each person has. instead or 100 caps for each headshot, he will give you 100 caps for each key you bring him, also with an added bonus. however he still wants you to kill Allistair Tenpenny.