Set in the immediate aftermath of the zombie apocalypse, Left 4 Dead's survival co-op mode lets up to four players blast a path through the swarming zombie hordes and terrifying mutant monsters. Guide your survivors across the rooftops of an abandoned metropolis, through rural ghost towns and pitch-black forests in your quest to escape a devastated Ground Zero crawling with infected enemies.

New technology dubbed the "AI Director" is used to generate a unique gameplay experience every time you play. The Director tailors the frequency and ferocity of the zombie attacks to your performance, putting you in the middle of a fast-paced, but not overwhelming, Hollywood horror movie.

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32 comments by Henley on Jun 20th, 2009

Some more news has been released via the Left 4 Dead blog about how exactly the new user created custom content is going to be implemented into the game. This will all be done by using an add-on platform and the new VPK file system.

Valve wrote:Third party campaigns are designed to be installed using a new Add-On framework. Content authors will be able to package up their new maps, along with new posters, models, and textures, into a single .VPK file. To install and activate this content in-game, players need simply download the .VPK and double click on it. Alternatively, they will be able to drop it into a new "addons" folder. The list of installed add-ons will be viewable from a new item on the 'Extras' main menu flyout.

It's nice to see that Valve has decided to make installing and playing custom content as easy as possible, and with the update to the matchmaking system if players do not own the VPK files needed for the custom campaign then it will be offered to them to download.

Valve wrote:When creating or searching for a lobby, a new option named "Add-on campaign" will let you select from among the add-on campaigns that you have installed. You can then find games or lobbies as well as create a lobby for that campaign. You can invite your friends, too. If they do not have the campaign installed, they will automatically be offered and an option to download it. We've also made it easier to create lobbies by adding a 'Create Lobby' option directly from the 'Play Online' menu. Once you're ready to go, the new matchmaking system will automatically try to find any dedicated servers nearby that have the custom add-on campaign installed, or you can make your own local server.

On my quest for answers on what exactly the VPK file is I managed to find that everyone's favourite Source SDK development program GCFScape now supports VPK files too. It turns out VPK is just a another variation on the GCF file that populates most Valve games, so being able to use others work looks like its possible, not sure what the copyright would be on that either. The last piece of news from this update is that as of this patch going live the L4D Authoring tools/SDK will go live as well. I would still like Valve to give modders access to a full SDK for L4D as the director in modding hands could see some great things be developed, but as of right now it does not look like it's going to happen. A shame really.

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Post comment Comments  (50 - 60 of 208)
FelipeFR Nov 10 2009, 12:23pm says:

Does anyone here know how to turn on the subtitles? And why the hell the voices in my game are in Russian?

+2 votes     reply to comment
Conchobhar Nov 5 2009, 10:00pm buried:


Does ANYONE at valve know what the hell iron-sights are?
It's almost 2010 and to have an FPS without them is ludicrous.

-8 votes     reply to comment
Lt.SnoWolf Jan 22 2010, 5:45pm replied:

Its called fun.

0 votes     reply to comment
FelipeFR Nov 10 2009, 12:21pm replied:

It's called realism, noob.

+3 votes     reply to comment
FelipeFR Nov 11 2009, 12:44pm replied:

LOL, I confused Crosshairs and Iron Sights. Sorry, my english failed.

+1 vote     reply to comment
LORDDEREX Dec 7 2009, 6:05am replied:

Iron sight, Solid aim.
Crosshair- ingame aim that is in the middle of ur screen (in most of the games/mods)

+1 vote     reply to comment
oskars18 Oct 24 2009, 2:41pm buried:


worst game ever. thankfully this game dont work on my pc(yet)

-20 votes     reply to comment
Louisfan96 Aug 16 2009, 9:20pm says:

can't wait for L4D2 to come out. it is going to rock! in gameinformer, they got an e-mail saying that Valve should make Left 4 Dead 2 a download. Then gameinformer replyed to it in the magazine, saying that there is over 3 new infected, over 5 new maps, and that the people who think it should be an expansion, are just sapprised thatit was made only a year after the first. Go melee weapons!!

+3 votes     reply to comment
Dig1tal_Cha0s Sep 29 2009, 5:56am buried:


Over 5 new maps is nothing that's a map pack and that's what people are complaining about.

-7 votes     reply to comment
Scarface123 Aug 10 2009, 2:06pm says:

Its the best ******* zombie game in the world

0 votes     reply to comment
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Left 4 Dead
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Released Nov 2008
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First Person Shooter
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Left 4 Dead
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Left 4 Dead 2
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