I'll admit, this thread was partially made just to toot my own horn. However, I'm genuinely curious to see how far people have gotten in Survival mode. What's your highest level, what map/tier was it on, and did you play alone or with a partner?
I just finished a single player Survival game on Seatown (tier two) in which I made it to Round 30 (and got so close to beating it but those damn choppers kept picking me off). Afterwards, I was very pleased to see I am now ranked 815th in the world on Seatown. :D