Disclaimers
Left 4 Dead and Left 4 Dead 2 were made by Valve. All rights to the game therefore belongs to Valve and we are, in no way, affiliated with Valve whatsoever. This group was created for pure entertainment and to take the game a step further and create a story coherent and related to the original game's plot.
If you're interested in knowing more about Valve, just take a look at the official Steam website.