Thanks to the efficiencies we were able to achieve with Linux, we skipped Valve time and are delivering the L4D2 Beta Linux build today as planned. The Beta build not only allows Linux owners to play the game natively, it is also the testing ground for our new Extended Mutation System.

If you currently own Left 4 Dead 2, You should see Left 4 Dead 2 Beta in your library. If it doesn t show up, restart Steam. This is a complete build of Left 4 Dead 2, so the build is as large as the current game.

The L4D2 Beta is mutating. Not content to just be the testing ground for the new Extended Mutation System, we will be adding Linux to the Beta. And not content with the number of testers in the Beta, we will also be opening up the Beta to all L4D2 owners.

To celebrate the release of Left 4 Dead 2 content in RE6 today, we are releasing two more RE6 special reskins for L4D2. Ogroman is a skin for the Charger and Lepotitsa (pictured) is a replacement for the Boomer. These two join Napad, the Tank replacement in our Official Resident Evil 6 Collection.

We have released the first of the Resident Evil 6 replacement creatures into the L4D2 workshop. You can have Napad replace the current Tank skin by simply going to its Workshop page and clicking subscribe. Why subscribe instead of download? Because if we make an update to the skin, everyone instantly gets the new updated version. By subscribing, you will always have the latest version.

This trailer shows the RE6 mode The Mercenaries: No Mercy, which pits Coach, Ellis, Nick and Rochelle against Resident Evil enemies, plus brings in the Witch and Mini-Tank from L4D2. This mode and the L4D2 characters and monsters are included for free in the PC version of Resident Evil 6.

Have you added any Workshop items to your game? If not, time to do it. The creative modders of L4D2 continue to add new content every day. The Cat mod pictured above changes all the common infected into cats. Do you shoot them or do you hug them? A little tip, hugging will not end well and shooting them is really, really hard. To download and keep your cats and other mods up to date, just click the subscribe button on the item page. Next time you start the game you will see the game automatically downloading the custom content.

With today s update, we fixed an issue with dedicated servers and workshop content. This should resolve some of the consistency issues people are seeing while playing on a dedicated server.

Server operators will need to move workshop content from addons to addons/workshop for it to work correctly sorry about that.

To celebrate, we are adding Helm s Deep Reborn to our own official servers. Gone is the long explanation of how to download and install the campaign. Now just visit its workshop page and click subscribe. Next time you open Left 4 Dead 2 it will begin to download. If the campaign gets updated it updates automatically for you. It s that easy.

Today we are releasing an Extended Mutation System for the L4D2 Beta program. Modders from around the world will help us test the expanded tools before we roll them into the main game and the workshop.