Here is the full list of all 14 Ballads at Midnight achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Change the default name.
Finish the game at 100%
Free Lucius of his curse and become a vampire with him.
Insist your name is Lucius
Cuss out a vampire (use profanity as name).
Stay with Lucius and remain human.
Free Lucius of his curse and remain human.
Choose to remain human and be kinky.
Stay with Lucius and become a bloodthirsty vampire with him.
Always insult the guards
Don’t skip the credit
Leave Lucius to live your best life
Skip the bard song.
Always make fun of the guards.