Here is the full list of all 28 Alternate Existence achievements.
Weird stuff at train station
You had a blast with the blond jogger
You had interesting times with uni's resident redhead
You had an academic "discussion" with the dean
You finally got action with your former foster mum
The maid asked you to be a plumber
You used a different kind of a remote with the younger neighbor
You liked the concert date with your favorite goth
Amber's mum is a very interesting person
Your favorite clothing store owner invited you to spend some quality time at her place
Your cougar neighbor wanted some more than a nerdy advice
You didn't know that librarians like outside air
Doctor's examination was very thorough
Taming of the fiesty resident blonde
Dating Andrea
A go-karting date with Andi and a grand finale
Dating Tania
A museum date with Tania was very special
Figured out RedLolliPop69's identity
Your first strange dream
Anne gave me freedom
Defended Summer at the train station
Decided to spend time with your bestie Sam
Decided to go alone to the beach and met Roselind
You wanted to have more time for yourself
Reached the end of season 1
Breakfast in the gym with Anne
Steamy makeout session in and by the pool with Summer