I'm surprised they used that L4D2 campaign. I got up to the last chapter and the safe house door wouldn't open to let me out. :|
you did use the radio in the last saferoom right? At least for me there was no audio response but 15-20m seconds later the get to the chopper text came up and the door was able to be unlocked.
I didn't even notice a radio...
Did they beta test this campaign AT ALL?
...you are aware that they are
currently beta testing it, right? Hence the "(Beta)" tag applied to the end of the map.
Moreover, they've made numerous improvements. I remember playing some of the early releases...
* The descent from the bridge used to involve climbing down a ridiculously long ladder (technically the mast of a sailing ship). You had to pray you didn't have an AI bot, since they simply fell off instead of climbing down. Also, pray a Smoker didn't spawn.
* The end of the finale used to be the helicopter descending in the middle of the woods, instead of the small outpost they currently have. Trying to find the exit, while being swarmed by common and chased by a Tank, was brutal.
* There didn't used to be a crescendo in the first map. Now there's a (small) one. Still disappointed it wasn't a running crescendo across the narrow log, but then again, that might've been too cheap.