The Left 4 Dead 2 Workshop has moved out of beta, Valve has announced.
With it you can add campaigns, items, clothing, weapons and other gubbins for the co-op zombie shoot 'em up.
Valve said some 1000 community campaigns and thousands of items and skins have already been created, and should show up in the LFD2 Workshop over the coming days and weeks.
It also encouraged players to rate and discuss submissions they're impressed by.
There's more on how to add and create LFD2 content on the LFD Blog.