According to Valve, the latest downloadable add-on pack for Left 4 Dead and Left for Dead 2 codenamed The Sacrifice will be officially available for download on both Xbox 360 and PC by 5th October 2010. The Sacrifice download contents (DLC) is the prequel to the previous April released called The Passing.

The Sacrifice will push the player to construct strong decisions where the survivor will be killed at the end and acquires the place of previous survivors from Left 4 Dead.

The Sacrifice DLC for Left 4 Dead is a different download then Sacrifice for Left 4 Dead 2, where L4D2 game players will receiver the L$D survivors and “No Mercy” campaign. You can play both the campaigns under Campaign vs Survival and Scavenge modes and both of them will feature the L4D2 Special Infected, items and weapons.