With the November 17 release of Left 4 Dead 2 fast approaching and backed by a $25 million ad campaign, developer Valve has produced a few television commercials. (video)15622(/video) Shackvideo users can use the HD Stream. The above spot features many of the same scenes glimpsed in the intro movie for the two-stage demo, which is now available on PC and xbox 360 . As for the other commercial, it focuses on the baseball bat weapon that will only be available to pre-order customers and those that play alongside them: (video)15536(/video)