Zombie Army 4: Dead War
70 Achievements
1,210
50.5-70h
PC
Xbox One
Xbox Series
Zombie killin' machine
Kill 5000 enemies of any kind.
15
7.49%
How to unlock the Zombie killin' machine achievement in Zombie Army 4: Dead War - Definitive Guide
Lightspeed Halo
TrueAchievements
TrueAchievements
You should have this by the time you finish the story and the horde wave 12 achievements but if you don't you can mop this one up by starting up Dead Ahead checkpoint 3 in story with 4 player zombie spawns on easy and just kill all zombies that spawn (don't go down the stairs!) and then restart checkpoint until you get it. Shouldn't be too hard stepbros. 
Tuffinz
This will certainly come before you ever reach the end of the campaign. If not it will certainly pop in Horde mode.
