13 Parasite Zombies killed (lifetime)

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

Fully upgrade an ability.

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

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

Witness the beginning of the Raccoon City outbreak.

Reached at least 100 stun attacks or sleep-inducing attacks.

Collect all trophies

Call one Healing Radio frequency

Find every type of camouflage

Poison a guard

CQC Interrogate an enemy