Me and my mate got to lvl 32 on the first zombie level. Dunno what its called, its his playstation. One where you're in a huge cinema, teleport is on the stage. Like I said, the first level. Is that good? I've read a few pages here, people seem to be struggling to get past level 15 on it with two people. If its unheard of for people to get here then I'll post a guide but we could easily get past level 32 just we had to turn it off last time we got there