Left 4 Dead 2 campaign set in the fictional Fort Harris County. Four survivors must make their way through the zombie infested city to escape the zombie apocalypse. This campaign spans three different times of day and features different environments in which to perfect your zombie slaying prowess!
I'm going to give this a 10 for one reason, it's amazing. This beats the default campaigns hands down and I have never had as much fun! This is as good as the Portal 2 and Half Life campaigns. Different settings, incredibly fun with co-op and having to transport a gnome around for the easter egg. I think that's a reason that made the map good was the objective, however the last level to round it all off was brilliantly done. I don't think we'll ever see a better map unfortunately.