Client

• Removed an infinite ammo exploit for molotovs
  

• 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