All kills are cumulative, so they count even if you reload a save. The tally counts your grand total from all games, or just when you're having fun. There are challenges to kill not only for the total number of zombies killed, but for killing zombies with each type of weapon - handguns, assault rifle, shotgun, grenade launcher, and magnum.
To earn lots (and lots) of points, you'll need to complete these destruction challenges for each weapon type. Below, I'll walk you through how to make it all easier.
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The store unlocks after completing re-campaign on any difficulty. Here you will be able to purchase items with points earned by completing challenges - the items you purchase can be accessed from any item box at any difficulty level.
In the shop, you can buy special items that increase your power, defense, or melee attacks - and you can buy unique weapons or weapons with unlimited ammo. The unlimited assault rifle is my favorite, and I highly recommend seize two assault pieces as soon as possible.
le best way to earn a lot of BP is by filling in the challenges of killing zombies. Start by aiming for the weapon specific kill challenges, then aim for the total killer zombie challenges.
Every weapon is different, so let's cover some great spots to increase total zombie kills and complete those challenges.
For all weapon challenges I recommend buy the two assault pieces and keeping them in your inventory. You'll score more kills faster and use less ammo.
Rifle and Assault Rifle Challenge:
Reload a save just before siege event at the end of Carlos' campaign in the Hospital. You can do assault rifle and pistol kills here - make sure you buy the Samurai Edge from the store and use it in place of Carlos' starter handgun.
Just reload and repeat this section using the handgun to earn tons of zombies, then the assault rifle.
Shotgun Kill Challenge:
Reload a backup at Power substation - save after being poisoned by the Deimos, but before entering. Save as much ammo as you can, then enter the bug nest - the bugs will almost always die in one hit with the shotgun.
Close as many victims as possible, then reload. Rinse and repeat. The tricky part is just making sure you have plenty of ammo, as the bugs here are endless. You can always restart the entire game and get to that area pretty quickly, saving every shotgun shell for now.
Grenade Launcher Challenge:
This one is tricky. There isn't a great place to farm to kill zombies with the Grenade Launcher - if you don't mind reloading often, come back to Makeshift bunker in front of Clocktower Nemesis boss. You will find several towers of mines.
There are two groups of zombies (4 and 3) that you can take out with the grenade launcher. Just kill all 7 zombies and reload.
You can also reload a save at the start of Hospital Pt. 2 when you take control of Jill - rush into underground storage and NEST 2, using the grenade launcher as often as possible.
Magnum Challenge:
The Magnum challenge looks tough, but you can make it a lot easier by purchasing the RAI-DEN energy weapon from the store. This tool also counts as a magnum class weapon and can be used by Carlos or Jill at any point in the game. You can reload Carlos' siege defense and use the RAI-DEN.
Otherwise you are stuck using it to NEST 2 or Underground storage area. Ammo is extremely limited, so you might only be able to get 8 kills before you need to reload a save.
Get all of those kills and you'll be on your way to winning the most powerful weapons in the game. It's extremely easy and it just takes a little longer.
