Smooth Talker G25:
Make 25 dialogue choices on Quests
When your dwellers are out on quests, they will sometimes run into other people or ghouls who won’t attack you on sight. When this happens you will have the opportunity to have a short conversation with them to try and prevent a fight. If it’s raiders, that’s not going to happen but since the outcome of the conversation doesn’t matter for this achievement, who cares if you anger a few raiders. After you have chosen your words, for good or bad, 25 times, this achievement will unlock.