Left 4 Dead 2's

Valve's recently delayed L4D1/L4D2 crossover is now coming sometime in the next few days.

Although Left 4 Dead 2's "The Passing" DLC missed its original late-March release, it looks like it didn't miss it by much. On the official L4D2 blog, Valve has announced the downloadable expansion will be releasing sometime next week.

The Passing -- which will run you 560 Microsoft Points, or $7 -- will add a new chapter to the Left 4 Dead story, with the main hook being a crossover between the survivors in the original game and the survivors in the sequel (and for a little more detail on this crossover, check out the spoiler-ish info here). The Passing also adds some new weapons and infected to the mix as well, including "specialty weapons" like an M60 heavy machine gun. Although Valve didn't give a specific date for when it'll be released, they did say they'd have more details on the L4D2 blog next week.

And in related Left 4 Dead 2 news, Valve also announced that two songs from the game's fictional band "Midnight Riders" have been released on the Rock Band Network, including "Midnight Ride" and "One Bad Man." You can check the song details here. http://www.rockband.com/music/artists/Midnight_Riders