The Sacrifice DLC coming to both L4D and L4D 2

[WaitingForNehalem]

http://www.pcgamer.com/2010/08/21/interview-valve-on-their-new-left-4-dead-dlc/

 

[Bill Brasky]

So L4D2 is actually getting TWO campaigns? It sounds like it'll get The Sacrifice and No Mercy, which was originally going to be just L4D. But since No Mercy was so popular they decided to port it to L4D2. I love Valve.