Basically, just play in Directed mode. All enemies will be one-shot with a headshot, which is very fast. All the challenges are very easy. I don't know why, but maybe some good spots for farming will be useful to someone. In all these places you can see all the exits and you can just stand in one place and farm zombies with one hand.

ASHWOOD


Vandor Farm:


EXIT 115:

10 elite kills - less than 20 minutes. All weapons will be upgraded in less than 10 hours. If you play in normal mode, you will receive one bear on wave 16 and then only a few waves later another one. After wave 30, your weapons will do very little damage. The usual method of farming is very long.


1. Start the Directed mode:



2. Follow the storyline until Uber Claus appears (wave 7).

3. Kill Uber Claus (phase 1.There is no need to kill the robot that flies out after the armor is destroyed.).
4. Press pause. Save and quit. (
You must have full health for the save button to appear.)
5. Load the game.



DONT KILL Uber Claus right away.
6. First, kill all the regular zombies.
(You will hear a sound indicating the wave has ended and a new one has begun. You can save and quit after the wave changes.)
7. Kill Uber Claus, save, and quit. (You must have full health for the save button to appear.)



Repeat steps 5-7 ad infinitum. Once you've unlocked 10 elite kills with one weapon, simply buy another one from the wall or get it from a mystery box. The PAP1 is enough to kill an Überclauss in a few seconds.