| Hunting Season|
Vanquish 100 Soldiers, 100 Scientists, 100 Engineers and 100 All-Stars
Difficulty: Somewhat hard
While Hunting Season is fairly easy, it will take a long time to accomplish. It is recommended to just enjoy the game, and you will progress through this achievement overtime until you eventually complete it. Do not focus on this achievement, it will only stress you out more to earn this, making you want to quit doing this achievement easier.
If you intend to complete this achievement more quickly, Gardens & Graveyards is a good mode, as there are oncoming waves of enemy zombies of all types and can also last the longest.