After three years in development, the fan-made Back to School campaign for Left 4 Dead 2 is finally available for download. You can head on over to the dev team's ModDB page to pick it up for yourself now, but you should probably watch the kinda completely awesome trailer they've released for their work first. Check it below.
According to the download page, the campaign is described as follows:
"Back to School is a full featured Left 4 Dead and Left 4 Dead 2 campaign. The storyline is not interfere with none of this games and offer completly new setting of Borden city, struggling to survive in an epidemic apocalypse alongside with original 4 heroes. They are getting a chance to save themselves, since USA marines are coming in town and not falling back this time. But during the battle apogee something goes terribly wrong and local school - the most safe place in city - turns out to be a death trap."
Sounds like my high school years. In any event, here's the trailer: