Score from inside the box with a player with the Poacher Speciality

This is that part

Do the same test twice

Master the Propulsion Gel

Master the Repulsion Gel

Stand in a defective turret detector

Make a break for it

Place a cube on a button without touching the cube

Reunite with GLaDOS

Dance perfectly in both Tony's nightclubs. (The Ballad of Gay Tony)

You completed a 500 foot wheelie on a motorbike.

Complete the Trinity. (The Ballad of Gay Tony)

Build Terry and Clay's toughness to 100%. (The Lost and Damned)