The Left 4 Dead 2 Workshop has moved out of beta and is now live for anyone to add campaigns, items, clothing, weapons, and more with just a simple click of a button.
Although it just went live, there are already over 1,000 community campaigns and thousands more items and skins already created for the game. Although Valve says these should appear within the next few days, or even weeks.
Valve insists that players don't upload the work of others. If a campaign you like isn't in the Workshop, you should ask the creator to post it. What you can do to help others, however, is make sure to rate and discuss each submission you play with.
You can start browsing the Left 4 Dead 2 Workshop here, and learn more about the process of creating and sharing content on the official L4D2 website.
Via: Left 4 Dead 2 Workshop goes live