Trigger a cross-class combo with a character you control in single-player mode.

Defeat Harlow

Obtain level 50

Survive the horde on the roof

Clear out the cinema

Kill special enemies: Grenadier, Thug, Wrestler, Infected, Suicider, Screamer, Butcher, Floater.

Rescue 20 NPCs that have been grabbed by monsters

Complete 1st & 10, Let’s Do It Again

Complete Line In The Sand

Complete Careful What You Wish For...

Destroy an enemy aircraft with an anti aircraft weapon

Find a boat for use in the jungle