Here is the full list of all 69 Lust Theory Season 2 achievements.
Took a risk with Ellie
Chose to not kiss Amy
Used your nose
Completed "NFG Day 2" Hidden Event
Completed "Xmas Story" Hidden Event
Completed "Xmas Story 2" Hidden Event
Completed "NFG Day 1" Hidden Event
Completed "Halloween Story" Hidden Event
Completed "Maturity" Hidden Event
Completed "The Test" Hidden Event
Completed "Mind Games" Hidden Event
Completed "Lovebirds" Hidden Event
Completed "Fifty Shades Of Megan" Hidden Event
Completed "Game Show" Hidden Event
Completed "Pool Party" Hidden Event
Completed "Sleep Day" Hidden Event
Completed "Nursed Back To Health" Hidden Event
Completed "Slumber Party" Hidden Event
Completed "Meeting Emma" Hidden Event
Completed "Officer Kate" Hidden Event
Completed ALL "Goodbye" stories
Completed Sophie's Goodbye Story
Completed Amy's Goodbye Story
Completed Nicole's Goodbye Story
Completed Zoe's Goodbye Story
Completed Megan's Goodbye Story
Completed Ellie's Goodbye Story
Completed Jessica's Goodbye Story
Completed Elizabeth's Goodbye Story
Checked out the Gallery
Asked Carol for more time
Broke the game
Managed to duplicate yourself
Chose to peek at the right time
Checked all your missed texts
Witnessed the impossible
Chose to push Amy into the pool
Completed Freeze day
Clicked on all three little buttons
Clicked on the NEW little red button
Chose to be risky with Elizabeth
Unlocked Sophie's story
Got every answer right on Nicole's quiz
Completed a day as Megan
Told Megan you don't regret anything
Had an encounter with REDACTED
Chose to stay with Sophie while she's angry
Unlocked Amy's story
Took the pill
Talked to everyone at home
Talked to everyone at the party
Chose to be honest with Ellie at the party
Completed the recap
Clicked on the little red button
Completed the intro
Clicked on the little angle button
Found PANIC! mode
Found a secret scene with Jessica
Acted like a redneck towards Ellie
Chose the wrong choice in the garage with Ellie
Chose the Jesus costume at the mall
Chose to stay with Jessica in the living room
Let Zoe drive
Chose to hide from Amy
Made the last decision
Completed "Five To Tango" Hidden Event
Acquired ALL "Hidden Event" achievements
Acquired ALL "Goodbye Story" and ALL "Hidden Event" achievements
Acquired ALL other achievements