Revive 31 teammates (lifetime)

Kill an enemy with each weapon type including special weapons.

13 Parasite Zombies killed (lifetime)

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.

Finish the game in Easy Mode

Defeat 50 enemies with the Dragon Sniper

Defeat 30 enemies with the Desert - 5

Defeat 20 enemies with the Pistole

Find 30 treasures

Defeat 20 enemies with a single punch, after softening them up with gunfire