17 Hunters Killed (lifetime)

Purchase all abilities for one character class.

13 Parasite Zombies killed (lifetime)

In Survivors mode, have all 4 players on your team Survive the game.

Follow orders and defeat all liabilities.

Infected 13 times (lifetime)

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

Fully upgrade an ability.

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

Purchase an ability.

Witness the beginning of the Raccoon City outbreak.

Save 5 people besieged by zombies.