I killed 30 special zombies with this weapon but didn't get the perk, it's still locked
#Bugged perk mission
frigid sandal
wraith tendon
Did you kill a few more just in case?
oblique cape
Try using the Slasher Class, don’t stun or shoot any special. Hit them directly and check.
Hope this helps you 
frigid sandal
Did you kill a few more just in case?
Yes, but it was solved after the maintenance
I got it now
frigid sandal
Try using the Slasher Class, don’t stun or shoot any special. Hit them directly ...
I used Slasher, I knew he had a perk for chainsaw