If you can remember as far back as somewhat over a year ago you will remember that Valve did the same thing with the original Left 4 Dead. The results were apparently pleasing as they plan on using the same marketing strategy for the sequel. Valve’s VP Doug Lombardi said in an interview that pre-ordering Left 4 Dead 2 will provide users with advanced access to the demo of the game. You can look forward to downloading the demo a few weeks prior to the games release which is scheduled for November 17. If you’re a fan of the game then there is no reason why you’re not going to get the sequel so you might as well just pre-order your copy and get a chance to play the demo before everyone else.