Nautilus (Final Fantasy XIII)

Nautilus is an amusement park and the capital of entertainment located in Cocoon in Final Fantasy XIII. It houses tame Cocoon Chocobos of a much smaller build than their Pulse variety. It is known as the "city of dreams".

Story
Sazh and Vanille arrive in Nautilus after leaving the Sunleth Waterscape. They see an advertisement for the Pompa Sancta Parade, which is followed by breaking news from Palumpolum, showing taped footage of Lightning, Hope, Snow, and Fang attacking PSICOM troops. Vanille recognizes Fang, but when Sazh asks her what is wrong, she says nothing. They attend the Pompa Sancta Parade, which tells the story of the War of Transgression between Pulse and Cocoon. The two make a visit to Nautilus Park where Sazh announces that he is going to turn himself into PSICOM in the hope of seeing Dajh once again. Vanille tries to persuade him not to and is about to admit that she was responsible for Dajh becoming a l'Cie when they are pounded by bullets from PSICOM troops.

The two escape into the clock tower where they destroy a robot before Sazh comes face to face with his son Dajh who suddenly turns into his crystal. The villainous Jihl Nabaat appears and tells Sazh that his son's Focus was to find Pulse l'Cie and then reveals that Vanille and Fang were responsible for his son turning into a l'Cie. Vanille runs away but Jihl encourages Sazh to pursue and kill her. He follows her to the Fiendlord's Keep where Vanille is hallucinating and seeing images of Sazh shooting her.

Sazh arrives and aims his gun at Vanille but his Eidolon Brynhildr appears and the two attack it, defeating the powerful summon. After the battle, Sazh once again turns his gun on Vanille but is unable to do it because he acknowledges that it will not do anything to help his son. Vanille takes full responsibility for what she has done wrong. Despite this, Sazh turns the gun on himself and it appears as though he has committed suicide at the end of the chapter, with Jihl carrying him away in a coffin and Vanille behind him in Purge attire.

However, in a flashback on the Palamecia it is revealed that Sazh was unable to end his own life. Jihl arrived with PSICOM troops and captured both Vanille and Sazh promising to erect a crystal to Dajh in Eden. The two were taken aboard the Palamecia and placed in confinement.

Zones

 * Nautilus Station
 * Park Square
 * Nautilus Concourse
 * Festival Road
 * Chocobo Corral
 * The Mall
 * The Clock Tower
 * The Fiendlord's Keep

Enemy Formations

 * Corps Gunner
 * Orion
 * Zwerg Metrodroid
 * Midlight Reaper (Boss)
 * Assault Gunner (Boss)
 * Brynhildr (Boss)

Music
The theme "Nautilus" is played here.

Trivia

 * The park's name most likely comes from the Final Fantasy III airship of the same name.
 * There is a boy NPC within the first section of Nautilus who chases after some other children. If you are close to him he will eventually utter "Run, run, or you'll be well done!" an obvious quote from Kefka Palazzo in Final Fantasy VI.