You Gotta Shoot 'Em in the Head

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

Awhile ago, Allistar Tenpenny hired five mercenaries, Crowley, Tera, Dave, Strayer(Who has since died) and Dukov. They were hired to find a rare gun for Tenpenny. Tera died in the fort and Crowley supposedly bit the dust. After feral ghouls got Tera, Dukov realized he would get more of the commission. So he later locked up Crowley in a room with feral ghouls, which never harmed him. The three remaining men finished the mission with Dave and Strayer being very leery and cautious.

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 asks you to do this because they are Ghoul bigots. If you manage to successfully 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 of 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.

Getting the Keys
You can pay, persuade or kill Dukov for his key or persuade Cherry, one of Dukov's "party girls" to retrieve the key for you. You can also just pickpocket it

Strayer's son is now in possesion of his father's key, which you can either persuade him to give you, threaten him or pay him for. Or kill him. Or pickpocket it.

To get Dave's key you can kill him, steal it or persuade him, just don't mention Crowley would like for you to kill him. Go with the Wasteland Ambassador Route, which needs very little speech skill, to get the key.

Choices
Now you have a few Choices, you can use the keys to go to Fort Constantine to get the T-51b Power Armor or return the keys to Crowley. Of course if Crowley already has the keys or you just gave him the keys you can steal them back or kill him for them.

However, if you're going to kill Crowley anyway, before you do that you might as well warn Tenpenny Crowley wants him dead. Tenpenny will offer you 200 caps (300 caps with speech) to kill Crowley instead.

(WARNING: I've run into a glitch on my game regarding this quest. At about 75 hours in I picked up the quest. Peacefully negotiated for all three keys, and then agreed to kill Crowly for Tenpenny. After killing Crowly you are instructed by your pip-boy to return to Tenpenny to collect your reward. But once you do all Tenpenny says is something about how he'll know when Crowley is dead and you get no reward or quest completion. To get the 360 achievement if you want to kill Crowley I suggest saving the game after acquiring all the keys, then give the keys to crowly. You don't even have to kill Tenpenny. Simply returning the 3 keys to Crowley will complete the quest and earn you your achievement. You can then reload the game and kill Crowley, or just kill him and take the keys back (but if you do this the quest is considered completed and you can not get a reward from Tenpenny). I'm hoping that there is a time delay with this quest as I just completed it last night (05/nov/08). If there is a time delay and Tenpenny recognizes that Crowley is worm food I'll edit this posting. I should have it figured out by tonight.)

Getting the T-51b Power Armor
First off you have to reach the fort, in the North West part of the map, near Raven Rock. If you travel from Raven Rock, be prepared to fight Enclave troops, Yao Guai and some treacherous terrain. Closer to the fort you encounter some Brotherhood of Steel Outcasts fighting protectrons and Mister Gutsys. Go to the small house "the CO's house" and head downstairs. In the basement you will find caps and a Bobble head go to the door, which will require strayer's key. Continue down picking up ammo and other supplies along the way. Eventually you will reach an icbm launch computer, you will need to launch it to open the door down the stairs. In bomb storage you'll find Tara's body, on the opposite of the two very hard locked doors. Go to the nearby door open it with your key and pick up the fatman inside. Now disable the stasis field and you have your armor.

(NOTE: theres also a safe inside the first level of the basement complex that contains an ICBM launch code. Look around a level or so below that and you'll find the launch control terminal at which you are given the option to launch an ICBM.)