Here is the full list of all 27 One Night Stand achievements. It takes around 1-2 hours to unlock all of the achievements on Windows.
You investigated every item in the game.
Turns out you share the same name!
You both felt the same way about the book, her writing and Love IRL.
You receive another message from Gary.
Escaped during her moment of need.
You choose to remain silent whenever possible.
She picked up her six-string.
Sharing isn't caring.
You got caught wearing her underwear.
You became friends.
That's why they call it a one night stand.
You got thrown out with your clothes on.
Accuse her of drugging you.
You chose not to believe anything.
You might want to double check the evidence...
You told her the last name that she wanted to hear.
Honesty really is the best policy.
What’s in a name anyway?
You became a fan of Love IRL.
You made a break for it.
You got thrown out.
You got thrown out without your clothes.
Escaped quickly and clothed.
You failed at the last hurdle.
Order a fancy coffee.
You successfully stole a pair of her panties.
You got rejected.