Also this guy called rucka10 put "good god i got to wave 32 and i sucked so bad and i got angry and watch some tv", well that's not possible because it only goes up to night 20...
If you die with the barret, you suck... I got 5 kills with it once. Oh and btw to get the survivor badge, just get at least 4 survivors before round 4 and you should be ok.