Complete Chapter 9 on any difficulty setting

Force an enemy into a Gravity Panel 5 times

Kill the Slug Boss with more than 50% Shield strength remaining

Kill 30 enemies with the Ripper

Kill 30 enemies with the Plasma Cutter

Kill 30 enemies with the Contact Beam

Kill the Leviathan

Kill 30 enemies with the Force Gun

Complete all training missions.

Complete all Single Player mission challenges in Paris.

Unlock all Skills.

Complete the Heist and the Co-op mission in Dead Kings at least once.