Complete the Specialist Boss Fight.

Destroy 10 Military Bases or Infected Hives in New York City.

Kill 50 characters in 5 seconds.

Use the Upgrade Menu to acquire an Upgrade.

Clear a Challenge in Challenge Mode.

Bandage 5 deep bleeding wounds.

Finish the episode without skipping any sequence.

Jump across the gap using the tow truck.

Destroy the Vampirz' nest.

Drive at least 10 miles with a vehicle.

Pierce a car gas tank and fill a bottle with the fuel.

Finish off a Humanz by shooting fire bullets at it's fissure.

Burn a Ratz nest.