Valve has announced that “The Sacrifice” – the new downloadable content for Left 4 Dead and Left 4 Dead 2 is now available on XBox Live. Â “The Sacrifice” is the prequel to “The Passing,” and takes place from the Left 4 Dead survivors’ perspective as they make their way south. Â In addition to advancing the story, “The Sacrifice” introduces a new style finale featuring “Sacrificial Gameplay” where players get to decide who will give their life so the others may live. It should also be noted that “The Sacrifice” downloadable content for Left 4 Dead 1 is a separate download than “The Sacrifice” for Left 4 Dead 2. Â In “The Sacrifice” for Left 4 Dead 1 gamers receive the complete Sacrifice campaign with maps playable in Campaign, Versus, and Survival. Â In “The Sacrifice” for Left 4 Dead 2, owners receive “The Sacrifice” campaign playable with the Left 4 Dead survivors. Â In addition, those with Left 4 Dead 2 receive Left 4 Dead’s “No Mercy” campaign. Â Both campaigns are playable in Campaign, Versus, Survival and Scavenge modes and both will feature the Left 4 Dead 2 Special Infected, items and weapons. Take a look at the trailer below and tell us what you think.