Left 4 Dead 2 gets Authoring Tools, Add-on Support

In keeping with the giving theme, Valve has announced that the Authoring Tools and Add-on Support are now available for Left 4 Dead 2, allowing players to play and/or create custom content for the zombie shooter. Those looking to only play custom made content will need to download and install only the Add-on Support, after which maps from both Left 4 Dead and Left 4 Dead 2 can be played, while creative minds need to get both. The L4D blog holds all the details.