Old meets new in the latetest downloadable campaign.

December 14, 2009 - Valve has unveiled the first of many expansion packs for Left 4 Dead 2. 

Titled "The Passing," this new downloadable add-on will see the original Left 4 Dead survivors, Francis, Bill, Zoey, and Louis, crossing paths with the current L4D2 cast. 

This new campaign takes place after the Dead Center mission in Left 4 Dead 2, and packs plenty of new singleplayer, mutliplayer, and co-op features. 

"The Passing" includes new arenas for Survival, Versus and Scavenge mode, as well as introducing a new "co-operative challenge mode of play." Also included is a new "uncommon common" zombie class, melee weapon, and firearm. 

"The Passing will become the most important campaign in the Left 4 Dead story, as all the Survivors are being called together in one campaign," said Doug Lombardi, VP of marketing at Valve. "It will also be a huge offering of new gameplay content, with something new for every game mode plus a new uncommon common and weaponry." 

No price or release details were given, but Valve said it's targeting an "early spring" launch. Will we be able to take control of the old survivors? Valve wasn't clear. Perhaps this is what the new co-op challenge mode will be.

From IGN.com: http://pc.ign.com/articles/105/1054953p1.html