ACHIEVEMENT - HOW TO UNLOCK Boom! Headshot! - Shoot 10 zombies offmap with Sniper items. Buspocalypse - Complete Act 1. Con-GRAVE-ulations - Complete all 10 blocks in Graveyard Survival. Endangered Species - Complete Act 2. Epic Oops! - Kill 1,000 Survivors. First Timer - Kill the first zombie in the Campaign. For the Greater Good - Kill 500 Survivors. Friendly Fire - Kill 100 Survivors. George Metesky - Kill 5 non-Zombies with a single grenade. Grand Theft Auto - Open 20 vehicles. Grande Surround - Surround 15 zombies at once. Late Title Card - Witness the glory of aggressive fonts!. Movie Lover - Watch America's Fighting Dinosaur at the drive-in. Occupy Town Hall - Complete all 20 blocks in Town Hall Survival. Oh, the Humanity! - Kill 8 or more survivors with a single air strike. Oops! - Kill 10 Survivors. Paleozombology - Complete Act 3 by defeating the boss without the forklift. Vaccination into Mutation - Apply the zombie cure to one patient. Congratulations. You created super zombies. Venti Surround - Surround 20 zombies at once. Winnar! - Complete the campaign. Zombie Assassin - Kill 500 Zombies. Zombie Butcher - Kill 100 Zombies. Zombie Massacre-er - Kill 5,000 Zombies. Zombie Murderer - Kill 1,000 Zombies. Zombie Tickler - Kill 10,000 Zombies.