[You must be registered and logged in to see this image.]
Left 4 Dead 2 will be free-to-play this weekend, starting tomorrow, October 25. New players can start pre-loading the game now on Steam, and current players will be the recipients of a new achievemen called Good Guy Nick. The free-to-play weened ends October 29 at 10.00am PDT/1.00pm EDT. Thanks, Game Informer.
~ Source