Left 4 Dead 2 SDK now available for download

Heads up to the PC modding community! Valve has today released the much awaited Software Development Kit of Left 4 Dead 2. The update, now available for download will add applications, utilities, and example files that are useful for building L4D2 game add-ons.

Heads up to the PC modding community! Valve has today released the much awaited Software Development Kit of Left 4 Dead 2. The update, now available for download will add applications, utilities, and example files that are useful for building L4D2 game add-ons.

Among the useful features of the Authoring Tools includes:

• Gamemode Logic: Designers can now make a single map that can behave differently depending on the gamemode in which it is being played. This can dramatically reduce the file size of Campaign add-ons, as the same map can be used for Co-op, Versus, Scavenge, and Survival.
• Director Logic: Maps can now alter their layout and behavior depending on how “angry” the A.I. director is. The better the Survivors are doing, the angrier the AI Director seems to get. This allows you to base variable paths and other events on the player’s skill and current conditions.
• Scavenge Mode Support! All the elements map authors need to support Scavenge in their maps. This includes game props as well as a full example in the form of Deadline 2, an updated tutorial campaign.

Also coinciding with the release of the SDK is the add-on support package of the game. The sizable download will update your L4D2 installation to allow running any map, including custom maps made for the original Left 4 Dead. Once the add-on support package is installed, you do not need to run this application, it will always be active.

Via [Left 4 Dead Blog]