*Reports from players suggest it could now take a little more kills to get the achievement to unlock, so if it doesn't at this count, just continue grinding a bit
In order to get this achievement efficiently, you should:
- Be level 50 and having maxed the Mechanic ability to unlock the ''Indestructible Vehicles'' perk.
- The best vehicles is the RollerHawg because of it's speed and deadly fire attachments.
The Method: Basically, you want to go to ''select chapter'' and load the chapter 3 (You will have enough time) and you want to head to district called '' Ingleton'' (Upper-left corner). There, grab your vehicle at the garage and then you want to follow the road on the picture below. Just stick to this road and you'll encounter plenty of zombies and little to no obstacles on your way. (It should take you about 1 hours to get to 53,597 kills)
If you think something should be added/removed, just leave me a comment below and we'll sort it out!
Good luck for the grinding !
Note: The PP challenges concerning kills require you to complete them all over again. What I mean by that is that when you reach for example 52,000 kill for the challenge, the kill count is set back to 0 in order for the new goal to be fulfilled.