The Sacrifice (comic)

On the 14th of September 2010, Valve released the first part to a four part The Sacrifice digital comic. (This comic can be found here. http://www.l4d.com/comic/)

Part one was released on the 14th of September.

Part two is to be released on the 21st of September

Part three is to be released on the 28th of September

Finally part four is to be released on the 8th of October