Here is the full list of all 13 Milky Way Prince – The Vampire Star achievements.
Save the Milky Way Prince
Avoid Critical Collapse
Find Anita
All Endings Completed
See the world through his eyes
Wear perfume and see what happens
Shave and see what happens
Ask the tough questions
Refuse to play his game
Find a way to distract him from his thoughts
Pay attention to your companion
Keep an eye on the changes in your room
Try all the offerings at the Moonage Daydream