Starting today, L4D2's second television spot (watch the first here)—drops on TV channels across North America. It's packed with explosions, jets, the song "Electric Worry" by Clutch, and hard-hitting action courtesy of our four Survivors Coach, Rochelle, Nick and Ellis.

Oh, and zombies.

The Left 4 Dead 2 demo is live and available for download on Xbox 360 and PC. Featuring gameplay from the first two (of five) chapters from "The Parish" campaign, the demo is set in the New Orleans French Quarter and is playable in Campaign mode. Keep an eye out for all-new guns, melee weapons, items, Special Infected and "Uncommon Common," a new campaign-specific set of zombies with unique abilities.

Those of you who pre-ordered Left 4 Dead 2 (for PC on Steam or at participating retailers) now have exclusive access to the momentous event they said would never happen. For the first time in history, two separate Valve universes collide. That's right: it's a Left 4 Dead/Team Fortress crossover! This is not fan fiction! This is not a dream sequence! The characters from Team Fortress 2 will team-up with Bill's hat from Left 4 Dead 1!

As many of you might have heard, Gabe and I went to Australia last week to try out the Source MOD made by Joe W-A, after he was able to raise the funds for the $3000 plane ticket in less than 48 hours.

We just had a great showing at the Tokyo Game Show. One of Left 4 Dead 2’s level designers, Kim Swift made the trip. You can check out her multi-language interview here.

Next public showing will be at the London Game Show where we will be showing the as of yet unannounced new game mode. We really should announce that soon… We can give you one hint, the game is 4 v 4. So get your team together and join us in London on October 29th or 30th.

Crash Course DLC is here! Find out what happens to Bill, Zoey, Louis, and Francis after their rooftop helicopter rescue in the No Mercy campaign. To celebrate the release of our second DLC for Left 4 Dead, we are offering Left 4 Dead for 50% off until Oct 2nd.

Next Stop: Penny Arcade Expo

We will be unveiling Dark Carnival at the Penny Arcade Expo in Seattle September 4-6.

Dark Carnival is the third of five campaigns we have revealed. It is the second campaign of the game and picks up after you have escaped from Savannah.

First Stop: Comic Con

During the San Diego Comic Con gamers had an opportunity to visit us in our Left 4 Dead 2 room and try out two L4D2 levels from the "Swamp Fever" campaign. The response was overwhelming, with lines going out the door well before we opened. Throughout the four days that the demo was made available, there was never an empty seat.

We're pretty excited about this next Left 4 Dead update, and we hope you will be as well. Since the Left 4 Dead Authoring Tools Beta was released several weeks ago, mod authors have been cooking with gas, so to speak. The ranks of dedicated community members working hard to create new content have been swelling, and a very hungry horde awaits...