Originally posted by iamhomosexual
37 and still no appearance we then died really difficult without all the perks at that stage
Wait is this a joke? Really difficult? At round 37 there is about 11-12 total hordes (I think, need to check my sheet at home). So what you do is kill 9 hordes, or so, in the biodome, or where ever you run circles, then bring that last few hordes down with you and fill up the tubes untill the end of the round. be sure to leave a crawler back so you have time to do what you need, take a piss, etc.
It doesn't get really difficult until 50+ where your Mustang & Sally won't get you out of a jam.
For me, it's in the 40's.The earliest is round 4, once we turned on the power.