Left 4 Dead Custom Campaign Update Next Week

Attention mod authors! Valve has announced that they'll be releasing a "Custom Campaign Update" for Left 4 Dead sometime next week. This update will include an official (non-beta) SDK, a new Add-Ons menu to view which mods you have installed and full Add-On Campaign matchmaking support. They also note that they've updated their Developer Community wiki with a new tutorial on how to package your creations. We'll be sure to let you know when the update goes live, so stay tuned! ;)