Here is the full list of all 22 Alexa's Wild Night achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Rejected by Brendan.
Witnesses something special.
Became a savvy investor.
Had a one night stand.
Completed the Photoshoot.
Needed a drink for photoshoot.
Fooled around with a stranger.
Went home alone.
Brendan proposed to you.
Brendan returned your feelings.
Won the basketball match.
Disappointed your Boss.
Got fired from your Job.
Went home with two guys.
Good Customer Service skills.
Admitted stripping for the Photo.
Stuck to your principals.
Went to the Photoshoot.
Got a real Girlfriend.
You kissed a girl and liked it.
rejected a drink at the bar.
Lost the basketball match.