Solo, 43.
Online, 28, with 2 guys at the end. I have a few things to say about this. It was originally 4 people, however 2 of them left due to them dying multiple times every round, and the guy I was stuck with wasn't even English, and he was a VERY bad team mate, one of the worst you could have. He would always kill every last zombie and crawler, never letting me go to the mystery box safely and I had to spend a whole round doing nothing but waiting for the PaP to appear and then run to it and PaP my Ray Gun (I prefer a gun for headshots), only for him to take all my zombies, worst match ever and I want to forget that by excelling my record. I found one decent guy, but he left as soon as he died, with 50k+ points, at round 23. I've lost hope with randoms, so I'm just stuck with round 28 for now until I can find someone decent to play with.