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