Here is the full list of all 20 Frisky Business achievements.
Get it on with all the girls
Get all possible endings
Break the 4th Wall
Get it on with Jenny X4
Threesome with Balbina and Serena
Be a Jerk to Sam and Charlie
No Wrong Answers in Trivia
Get it on with Tiffany
Dated Jenny
Have Threesome with Jenny and Gertrude
Get it on with Claire
Dated Lucy
Dated Balbina
Piss off Balbina
Collect every piece of evidence
Complete a play through with no sexy times
Be nice to Charlie
Be nice to Charlie and Samantha
Get the true ending
Peep through all the girls windows