Left 4 Dead 2 - Authoring Tools ::: 20 MB
Similar to the tools released for original Left 4 Dead - includes many updates and new features. Visit the blog for more info.
Add-on Support ::: 350 MB
FOR ALL PLAYERS: Install this to allow running any custom map, including the ones released for original L4D. You do NOT need to run this application. It only updates your L4D2 installation.
