You basically stroll thru your own "Nightmare" consisting of different location like LotR or a TinTin Comic. Each level has a very unique design as a different dream. Things can sometimes get hard as the designer is skilled in evil zombie placement and making traps. 3 smokers spawnign around a thin staircase can bring you in bad situations.
I really recommend to everyone to test this map out!
Bugs: On the LotR level you might get a "NAV error - cannot populate map". But you can still finish the map with no problems usually. Only one time a tank that busts a door didnt appear so we couldnt advance. Overall tho there are no big bugs.