The Sacrifice

The Sacrifice is an upcoming three-map DLC for both Left 4 Dead and Left 4 Dead 2. According to an interview it might be released on October 5th. It will be free on the PC and Mac (to be launched with the Mac version of Left 4 Dead 2 at the same time ), and cost 560 Microsoft points for the Xbox 360.

It will be the sixth and so far last campaign for Left 4 Dead. Whether or not there will be another later DLC is unknown. Although it was hinted that there will be more, in a Valve interview it was said that the Left 4 Dead story was: "Far from over!"
 * When downloaded for Left 4 Dead, you will gain a new campaign, called The Sacrifice, which is played as the original Survivors, and end with a member of the team sacrificing themselves.
 * When downloaded for Left 4 Dead 2, you will gain The Sacrifice, along with No Mercy from the original Left 4 Dead being playable. In addition, players will take control as the original Survivors, but retain all the new weapons and items from Left 4 Dead 2, such as the M60, Chainsaw and Defibrillator , along with the Special Infected from Left 4 Dead 2.