Here is the full list of all 86 Lust Academy - there are Season 1 achievements.
Reject Lily at the Academy
Don't take advantage of Samantha's weakness
Reject Audrey
Win 10 Duels
Catch 100 fishes for Gordon
Reject Naomi
Comfort Hayley
Do not sneak a peek at Ashley
Complete Season 1 main storyline
Make love with Naomi at the library
Get a blowjob from Naomi
Save Elijah's brother
Make love with Hayley on the beach
Go to a desert island
Apply a potion during a duel
Take Haley on a second date
Get in the VIP with Sadira
Mix a Reflection Potion
Make love with Lily at the Academy
Mix a Lesser Heal Potion
Meet Mushroom girl in the forest
Make love with Lily in the forest of mushrooms
Reject Lily in the forest of mushrooms
Stick your fingers in Lily's panties
Have your first kiss with Lily
Get Samantha to help with the ritual
Get into a secret room
Find books for Lily
Steal the answers to Naomi's test
Agree to help Naomi with her potions
Sleep with Audrey in her true form
Win 5 Duels
Spy on Amelie
Sneak peeks at Molly in the morning
Find out the truth about your parents
Save Cordale from destruction
Help Amelie deal with the Elves
Get the Lion's Seal
Go on a date with Adele
Get in the VIP with Lucy
Volunteer for Victoria's class
Become a participant in the tournament
Return 10 Lost Folios to Amelie
Agree to have sex with Audrey
Kiss Samantha after the party
Defeat the student from Adderin in a duel.
Take additional class from Victoria
Run into Samantha in the bathroom
Catch 50 fishes for Gordon
Catch 30 fishes in one fishing trip
Get bitten by Vanessa
Drink Vanessa's signature cocktail
Save Adele from Diego
Win Duel
Return 5 lost folios to Amelie
Agree to help Lily lead Leonheart to victory
Have your first kiss with Hayley
Defeat the phantom soulstealer
Agree to help Haley investigate E. Bloom mystery
Find out the truth about Audrey
Summon Leona through the sorting book
Kiss Samantha on the lips
Learn a combat bolt
Return a lost folio to Amelie
Prove to Naomi that you are worthy of her
Catch 25 fishes for Gordon
Get a massage
Win the weekly house competition
Get the highest tip possible
Correctly name the potion recipe in Sabrina's class
Take Audrey to a closed cafe
Get milk for Audrey
Get a job at the cafe
Attend Sabrina's first class
Click on the ducks in the bathroom at Leonheart campus
Attend Victoria's first class
Ask Haley out on a date
Get textbooks from Ameliе
Get on Leonheart house
Pass the exam and enter the Academy
Find out about houses in Cordale
Read someone's thoughts
Sneak a peek at Ashley
Get a letter from the Academy
Click on the rubber ducks in the house