Valve has released a new update. You guys know the drill. Once there are less people on the servers I will start updating the servers one at a time. Updating could take up to a few hours. Details bellow:

Left 4 Dead 2 Update Released
Product Update – Valve

Updates to Left 4 Dead 2 have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

Left 4 Dead 2
Updated Dead Air Campaign
Added “Connecting Fights” Achievement