*Guide was created by Dracul Rosu for the PC version of this gameThere are 30 challenges in total scattered around the complex marked by purple stars, only one is unlocked at the begining, the others will unlock as soon as you kill the required nomber of zombies.
Bronze is a piece of cake, and even gold is kinda easy, you just need to know the right combinations of weapons/outfits/magazines to use
Here is a topic with hints
https://www.xboxachievements.com/forum/showthread.php?t=3356...