According to Eurogamer, The Left 4 Dead 2 Workshop has made the smooth transition out of beta and is now live. Players can add campaigns, items, clothing, weapons for the co-op zombie shooter game. The following information was shared by Valve.
To add content to L4D2:
Load up Left 4 Dead 2 (or browse to it here). In game, click on the add-ons section from the main menu. There you can see add-ons once they are downloaded or choose browse the Workshop. Go into the Workshop, find a something you like – let’s say a skin for Francis where he is in a cop outfit. Click the subscribe button and it will automatically download and appear in the list. If you are doing this through the web browser, it will appear next time you start the game.
Please note – the Workshop has increased its file size limit to 200MB. But this still means some of the larger campaigns will be broken up into sub-200mb chunks. Those campaigns will be in collections and you will need to subscribe to the collection to get all the files.
To create and share content in L4D2:
You will need to update your Authoring Tools and run the Workshop Manager in the tools to upload your content to the Workshop.
A great tip from GShock:
If your campaign is over 200MB you will need to split your vpk into parts with content in each part.
This will also allow you to update your content a lot faster and in turn users do not have to download a much larger file when you release an update to a part.