I used to make stuff, nothing grand, but it was fun. I got too busy as I got older. Still like to mess around every now and then though.
This is just an all around great Campaign for both coop and versus. The atmosphere is attractive, the layout and design keeps the maps interesting and unexpecting, and the changeups to the default crescendo's and finale really make it a very unique and fun campaign.
Its a little late after L4D2's hayday, but very much worth the play.