Dark Carnival

Dark Carnival is the second campaign of Left 4 Dead 2, that takes place in a Whispering Oaks carnival. It starts off on a highway with the Survivors heading towards a Ferris wheel in the distance, passing through a motel complex, and eventually reaching Whispering Oaks carnival. This campaign brings unique situations to Left 4 Dead 2. One situation described by the writer was that how weird it would be when the merry-go-round starts while you're fighting an Infected horde. It is the third campaign to be announced by Valve.

Trivia

 * From screenshots revealed by Valve, it appears that the Dark Carnival campaign will take place at night, thus putting to rest the rumors about Swamp Fever being the only campaign to be set at night.
 * Dark Carnival is host to a new Uncommon Common Infected, the Clown Infected. His function is very similar to the cut SI the Screamer.
 * Dark Carnival's poster is the first poster to feature an infected, as well as the first to be in landscape position, as opposed to every other campaign poster yet.
 * Ellis' clothes have yet again changed colors in the poster.
 * The infamous Gnome from Half Life 2: Episode 2 makes an appearance in the poster, just in between Ellis' legs.
 * The tagline in this campaign obviously refers to the height they do on people to make sure they could ride on the attraction safely. This tagline is also about to be made by fans, due to "You must be this tall... To die" tagline suggestion appearing several times at the official forums before it was officially unveiled.
 * There is a sign next to Ellis that says "Welcome Friends".
 * On the poster, Nick appears to be wielding an AK-47.
 * One of the safe rooms appears to be in the "Tunnel of Love" (as seen in some PAX videos).
 * In the dialogue before the campagin, it reveals that it was Ellis's idea to go on to the highway, and Coach used to go to Whispering Oaks as a kid.
 * The campaign may also be a reference to horror films involving clowns and carnivals in a really creepy enviornment, which would make sense, because the background looks creepy in the poster, the camaign is in a carnival, and has clowns in it.