This is my very first campain using any SDK but ive worked on it for a good couple weeks and im glad its all came together finally.
Hope you enjoy the sky city campain.
Extract the campain and place it in the add on folder within the swarm program files.
should be: alien swarm/swarm/addon.
Then double click the VPK, enable in the options in the game and play.
If there are problems selecting the campain from thecampain selection screen then load up and map and then do the command:
Notes: sky boxes dont seem to work in alien swarm so there are only backgrounds that are just black. The objective pics dont work either but i beilive thats soemthing on steams part that ahs gone wrong: the hammer entiries dont seems to point to them correctly.
and incase the levels dont send you to the next level: repeat the above command but with the different level name.
for refrence the levels go in this order:
Science wing - sky elevator - sky bridges - residential area