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.
Finish the game at 100%
Free Lucius of his curse and become a vampire with him.
Free Lucius of his curse and remain human.
Stay with Lucius and become a bloodthirsty vampire with him.
Choose to remain human and be kinky.
Stay with Lucius and remain human.
Don’t skip the credit
Leave Lucius to live your best life
Skip the bard song.
Insist your name is Lucius
Change the default name.
Cuss out a vampire (use profanity as name).
Always make fun of the guards.
Always insult the guards