I found this story on http://www.destructoid.com/
Those who have played Left 4 Dead 2's "Dark Carnival" campaign will likely know of The Midnight Riders. They are a fictional rock band that Ellis seems to be rather fond of, and the campaign's finale involves the Survivors fighting on a stage set up for a Riders concert. It's an incredible moment, and we've just discovered a brand new Web site all about the band!
Here is the teaser site