Dark Carnival

Dark Carnival is the second campaign of Left 4 Dead 2, that takes place at 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

 * Dark Carnival is host to a new Uncommon Common Infected, the Clown Infected. His function is very similar to the cut SI the Screamer.
 * There also appear to be Infected with T-shirts that read "STAFF", implying they were working at Whispering Oaks when the Infection struck.
 * 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 may have been influenced by suggestions made on the official forums.
 * One of the safe rooms appears to be in the "Tunnel of Love" (as seen in some PAX videos).
 * In the dialogue before the campaign, it reveals that it was Ellis' idea to go on to the highway, and Coach used to go to Whispering Oaks as a kid.
 * The concept of a carnival in L4D was wanted much, and people thought it would end up being a DLC.
 * This is the first campaign in which the new laser sights upgrade is seen.