Down an opponent without using a Super Combo or Tandem Attack.

Melee 5 enemies in a row.

Start the Single Player Campaign on any difficulty.

Fully upgrade all abilities for one character class.

Kill 50 opponents in Versus. (lifetime)

Follow orders and defeat all liabilities.

17 Hunters Killed (lifetime)

Kill 13 zombified teammates.

Kill an enemy with each weapon type including special weapons.

Kill an infected teammate with a headshot before they become a zombie in any mode.

Heal with 101 Green Herbs (lifetime)

Infected 13 times (lifetime)

Complete the fourth mission of the U.S.S. campaign.