I've been very busy lately and unable to do my usual playthroughs, but I have been playing Killing Floor for a bit and since most of the abusable mutators have been de-whitelisted I found another way to quickly level up perks, especially Demo as shown here. You could also train Support Specialist, Firebug or Commando here if you really wanted to but it would be a bit more tricky. I hope this can help you out if you're trying to power level your perks.
KF-Arcade-Gas-Station-V1 is the map I am playing on here.
Add &fmt=18 to the link for high quality or hit the in video button.
IT'S A LEGITIMATE STRATEGY
filippo531 5 days ago
KF-Arcade-Gas-Station-V is the map , download from google
BabyImSelfish 2 months ago
its enough of 1 pipe bomb?
Starioshka 7 months ago
yeah.. where did you get the map
DuraheLL 10 months ago
can you start making Team Fortress 2 videos again (your losing over 50% of your subscribers)
FelixJohanHagman 1 year ago