i would myself go through pain to get this achievement but as of the moment right now im lazy and in a hurry to get this achievement so dont mind if i do!

This reply is a bit too late to be useful but I do have another add on to kill the witch in one hit: https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=2257790912

Witches still have full HP and can insta-kill you. Kinda sad since I was looking forward to use this to get the achievement of killing a witch with melee only without anyone getting incapacitated.

The tanks were easy to kill, and it was plain boring.. the bois didn't like that much 3/10 also their wasn't any commons how boring is that?

i didn't use this to get the achievement

thanks bro really works

yes

does it serve for the archievement of passing a campaign in realistic expert?

works with finish all l4d2 campaigns on expert?

lol

i use this to get achievements now and got still something to prove, gong show, the main attraction. this add-on helps you get achievements not only 2 lol

oh ok

Cool cool. Probably wasn't registering cuz you were playing on sacrifice and technically you can't survive that one running solo.

YESSSS IT WORKED!!

that is correct and i don't know i'll delete some add-ons

This is quite strange. I've looked over the files and can't find any issues. It looks like the mutation works for you, but it's not unlocking the achievement, correct? Do you have add ons installed that could possibly disable achievements? That's the only thing I can think of that would cause that if the mutation is working. If you try again after disabling some stuff and it still doesn't work, I'll host a game later today after I re-test this on one of my other accounts.

ay evil pls fix? maybe

it was single player

Not sure why it wouldn't work honestly. Did you play online or was it single player offline? I'm pretty sure I was in offline single player when I checked to see if this worked. This shouldn't make a difference really but you know how l4d2 is.

never got the achievements, :( this doesn't work.

haha it works.

where easy survival? I need this

Wow what a great addon!