Complete all U.S.S. missions on Veteran.

3 Tyrants Killed (lifetime)

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

Kill 13 zombified teammates.

Revive 31 teammates (lifetime)

Attempt "The Rescue" and survive.

Purchase 5 weapons.

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

13 Parasite Zombies killed (lifetime)

Kill an enemy with each weapon type including special weapons.

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

Kill 5 enemies with Blood Frenzy in a single campaign game or multiplayer match.

Purchase an ability.