Valve announced some new details today for the Left 4 Dead 2 demo which is set to be unleashed on Xbox Live later this month. The demo will feature part of the campaign from "The Parish" which is set in the New Orleans French Quarter. The demo will feature the all new melee weapons as well as boss infected zombies.

If you pre-order the game you'll get early access to the demo starting on October 27th. The demo for everyone else won't see release for all Xbox Live members until November 10th with the game releasing on November 17th. Xbox Live Gold members will be able to access the public demo on November 3rd.

            With the AI Director 2.0, L4D's dynamic gameplay is taken to the next level by giving the Director the ability to procedurally change weather effects, world objects, and pathways in addition to tailoring the enemy population, effects, and sounds to match the players' performance. The result is a unique game session custom fitted to provide a satisfying and uniquely challenging experience each time the game is played.

Left 4 Dead 2 is releasing exclulsively for the Xbox 360 and PC.