Story Progression in Act 2 - Chapter 3 (any difficulty setting)

Defeat George Human Boss

Story Progression in Act 1 - Chapter 1 (any difficulty setting)

Successfully manage to pass the train on Juan Chase level.

Cross U.S.–Mexican border.

Enter the Ghost Town.

Kill at least 10 enemies with a weapon melee attack.

Successfully drive off the highway on Convoy level.

Kill 50 enemies while having Concentration Mode active.

Unlock at least 10 new weapons in the campaign mode.

Destroy 20 cars.

Kill at least 4 enemies during a single Concentration Mode.