Every time Valve releases some new content, there is quite an excitement among the fans of Left 4 Dead and Left 4 Dead 2. Well, at least among the PC community that is allowed to get it for free. On Xbox 360, it will cost you 560 Microsoft Points if you want to find out what happened to the survivors of the first episode. Entitled Sacrifice, something that should definitely be meaningful to those who hate paying for extra content, it will be available to download next Wednesday. Until then, you can at least enjoy the very effective 1080p trailer.