Originally Posted by Take2TheSkies
"When you get to Tenpenny Tower you will see a Ghoul once inside after speaking through the intercom go speak to people until you are able to kills the ghouls, yet instead of killing them once in the station talk to them and help them take over Tenpenny Tower. It makes the game go easier and also avoids missing any other achievement later needed."
What "other achievements" do you mean?
Shoot 'Em in the Head achievement involves Allistar Tenpenny. But I didn't even have to speak to him to get this achievement. Also the only way not to kill Allistar Tenpenny for this quest is to kill Roy and his gang. Letting in the Ghouls kills everyone, helping the Ghouls live with the tennants, well if you come back a day later only Ghouls are there.