This is a no kill zombie run. If any zombies were killed by accident; I restarted from a earlier save. I intentionally did kill some zombies, out of frustration due to sucking at the game; and I reverted to an earlier save and continued on. Giving Survivors weapons and letting them kill zombies does not nullify the challenge. My Mom told me so. Also in this challenge run, I also attempted to save all the Survivors I could for the getting the best ending possible; which is Ending A which leads to Overtime Mode to get the True Ending. This is not my first time attempting the challenge, I've done it twice before. The previous times I accomplished the challenge, I did better... of course there is no recording of those times when I did this challenge better... So I'll be doing this challenge again! Because I'm a glutton for punishment.