Removed an infinite ammo exploit for molotovs



The team swapping issue in Versus has been fixed



Players download third party campaigns as single .VPK file



Players can manage and select add-on maps and campaigns via game UI



Added matchmaking support and download/update prompt for add-on campaigns



Custom campaign support in Leader boards



If not already registered, left4dead.exe registers .VPK extension to allow automatic install of add-ons



Servers and the steam API have been extended to allow servers to send up a list of keys for matchmaking up to 1200 bytes in size



Fixed missing fgd error



Added vpk.exe command line tool for extracting, creating, and appending .VPK files



Removed info_versus (not used)



Added info_gamemode which fires outputs for Coop, Versus or Survival depending on what game mode the map is loaded in



Updated tutorial_standards example map, repackaged as 'Dead Line' campaign example add-on



Sample content now includes source files for official maps



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