Back to the Future: The Game
60 Achievements
8-10h
PS3
Breaking Up is Hard to Do
Broke up Emmett and Edna.
28.1%
How to unlock the Breaking Up is Hard to Do achievement in Back to the Future: The Game - Definitive Guide
TlMB0
This trophy is story related and cannot be missed.
To get this trophy, you must convince Edna to break up with Emmett by making her jealous (Trixie), making her think Emmett is a slob (Tampering with the Cleanser Bottle), and making her think Emmett is a criminal (Altering Emmett's Mind Map.). Once these three tasks have been completed, Edna will break up with Emmett, and you will earn this trophy.
Refer to the Trophy Walkthrough under "To The Expo!" 
, for more.