Mirror's Edge
50 Achievements
1250
Xbox 360
Xbox One
Xbox Series
Back on the job
Complete the Tutorial
10
How to unlock the Back on the job achievement in Mirror's Edge - Definitive Guide
Simply beat the first part of this walkthrough (training), don't skip it:
When you start the game, you'll have to complete a tutorial, designed to give you a feel for the game. Simply complete Celeste's lessons and the trophy will unlock after the combat training lessons.