The art design is slightly different, too -- the New Orleans levels which we played through seemed a lot more colorful than most of the campaigns in the original. Like Diablo III's change in artistic direction, this may polarize people, but we see it as a good thing. We suspect it may be something unique to the New Orleans level, if the single Swamp Fever screeny is anything to go by.

The campaign plays just like a Left 4 Dead campaign. Bounce from safe room to safe room, avoiding zombies in-between. Valve has changed up the last level of the campaign though -- and this will be true of all campaigns in the game -- by using the last level as a mega-finale. While in Left 4 Dead the last level would usually end with an epic climax, requiring you to defend an area until help arrives, Left 4 Dead 2 will involve "gauntlet" style levels.

In New Orleans' case, the last level has you crossing a massive bridge in order to reach a rescue helicopter on the other side. To your left and right are 100-foot drops to the ocean and behind you are the burning remains of New Orleans that you've been so desperately trying to escape. As you cross the bridge, making your way through the maze of broken cars and trucks, you'll need to fight through wave after wave of zombies. Don't stop moving -- the approaching zombies are never-ending.

Also, watch out for that Charger. He'll knock you into the sea if you so much as look at him funny -- and let's face it, an arm as big as his is going to draw looks. The Charger is a welcome inclusion to Left 4 Dead 2. People are so familiar with the special infected that one or two new enemies will get players anxious again.

Ultimately, that's one of the most important things Left 4 Dead 2 can do -- remove people from their safety zones. After playing the original for a few months, you begin to see the seams and puppet strings. Like watching your favorite horror movie over and over again, the scares don't scare anymore. If L4D2 can do that again -- have us peeking round every corner and jumping at every noise -- then maybe it will be worth the $60 price tag. We'll see if that's the case when the game launches this November.