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"We've heard about the impressive capabilities of the in-beta Left 4 Dead Authoring Tools -- and recently, we've seen the SDK's fantastic handiwork -- but we haven't had a chance to get our hands on it yet. Luckily, Valve is dropping an update for the zombocalypse sim on Steam next week; one that will give everyone access to the authoring tools, and allow everyone to play the community's homegrown campaigns.The level hunting process sounds simple enough -- amateur level designers bundle all their maps, posters, models, and textures into a single .VPK file, which players must download and drop into the game's \"addons\" folder. Voila! Now you have access to even more Witch/car alarm shooting ranges err ... survival zones. Update: It's here.[Via Evil Avatar]"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.engadget.com/2009/06/20/pc-version-of-left-4-dead-getting-custom-level-support-next-week/>