I finished it 2 times, but right at the end of a level, when helicopter arrives, the game kicks me out of the server saying "Lost connection to server" and it's only in survival. My friend has no issues with this, since we played together and he got XP, gear etc, and it is really annoying since i'm playing it, and it's a lot of fun, but i'm gaining nothing from it, aswell as that free gear.