Here is the full list of all 20 Backstage Pass achievements.
Got the alone ending at least five times.
Unlocked every ending.
Became a famous makeup artist.
Became an online celebrity.
Became a producer.
Bought every article of clothing.
Got the best end in Alvin's route.
Bought every item.
Got the best end in Nicole's route.
Got the best end in Lloyd's route.
Ended the year with tons of money.
Got the best end in Matthew's friendship and romance routes.
Got the best end in Benito's friendship and romance routes.
Maxed out all stats.
Got the best end in John's friendship and romance routes.
Got the best end in Adam's friendship and romance routes.
Dropped out of college.
Ended the year with a 4.0 GPA.
Ended the year in the same place you began.
Filled Sian's cookbook with every cupcake recipe.