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]

This article was originally published on Joystiq.