L4D Add-on Update

[source-maps]

The L4D Add-on Campaign Support and Authoring Tools update has been released.

this includes the following:

Client

Removed an infinite ammo exploit for molotovs


Add-on Campaign Support

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


Left 4 Dead Authoring Tools

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