Defeat Your First Enemy
Defeat 100 Infected
Defeat 500 Zombies
Defeat 50 Jumpers
Defeat 10 Executioners
Defeat 50 Runners
Defeat 10 Regurgitators
Defeat 10 Ice Executioners
Defeat 10 Fire Jumpers
Defeat 10 Giant Zombies
Defeat 5 Chameleon Zombies
Defeat 10 Ghosts
Defeat 200 Slimes
Defeat 1000 Enemies