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

Obtain level 70

Kill the Twins

Successfully defend the tunnel entrance

Install a total of 5 barricades during hub defense

Kill 100 monsters with thrown melee weapons

Mark 100 opponents which were then killed by your co-op partners

Kill 10 monsters with one mine

Spend $5000 at the shop.

Lure and kill a predator.

Liberate an outpost without triggering an alarm.

Complete a Supply Drop quest.