Defeat Absalom

Build three wings on a house

Finish the game

Enter the docks in Quarantine Zone

Survive the horde on the roof

Find 50% of collectibles

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

Finish quests for Dr. Kessler

Successfully defend the tunnel entrance

Kill 100 monsters with thrown melee weapons

Rescue 20 NPCs that have been grabbed by monsters

Kill 50 monsters by smashing, decapitating or shooting them in the head