Forbidden Siren 2[a] is a 2006 survival horror stealth game developed and published by Sony Computer Entertainment for the PlayStation 2.

[1] The game tells the story of several characters who become trapped on Yamijima Island, off the coast of mainland Japan.

Twenty-nine years later, in 2005, a journalist is visiting the island to conduct research for an article when the ferry he and a small group of other passengers are on capsizes.

The game is played from the perspective of these characters, and out of chronological order, as the protagonists attempt to survive the island's monsters and discover its mystery.

Like its predecessor, Forbidden Siren 2 is divided into numerous scenarios, organized chronologically in a table called the "Link Navigator".

The game's defining feature is "sightjacking," to see and hear from the perspectives of nearby shibito, yamibito, humans, and other creatures.

The process is similar to tuning into a radio frequency, with the left analog stick serving as the dial.

Via sightjacking, the player can discover a shibito's position, patrol route, locations and items of interest.

The catalog has been expanded to include additional media types such as audio, video, and other interactive supplements.

Before Kanae can complete her mission, Tsuneo Ohta, the head of a group of fishermen, determines she must be killed.

Local authorities can't explain how Yamijima's undersea power cable was severed, or how the entire population of the island disappeared.

She finds living as a human so comfortable that she forgets her original purpose and settles into a normal life.

[4] Meanwhile, Yuri Kishida, an innocent young girl, is kidnapped by Mother and hidden in a warehouse in Sanzu Harbor.

[5][6] Mother creates another avatar using Yuri's identity, and sends her to visit Ryuko, killing her for failing in her mission.

Yuri then heads to Sanzu Harbor to watch the departure of the protagonists for Yamijima Island, as Mother knows that the person who will release her is among them.

[7] At the harbor a grown Shu, Mamoru Itsuki, Soji Abe, Akiko Kiyota and Ikuko Kifune board a small boat heading for Yamijima Island.

A large mass passes the boat unseen, the waves turn red, and a tsunami capsizes the vessel, splitting the passengers up.

Also present is Ichiko Yagura, a young schoolgirl, who awakens on board the Bright Win, a ferry that has run aground.

As the group talk, a red tsunami appears and an earthquake rocks the island as a siren rings out.

Back in the Underworld, Mother, now free from her prison, gives birth to hundreds of yamirei - albino slug-like creatures.

As they are about to be killed, a group of shiryos (the spirits that animate the dead into shibito) pour down into the abyss and fight the yamirei, giving Ikuko and Mamoru the opportunity to escape.

Shu contacts Akiko from beyond the grave and asks her to save his father, Ryuhei, who has transformed into a kou-yamibito, a grotesque human/yamirei creature much stronger and more deadly than a normal yamibito.

In the vision, Kanae flees, covered in Ryuhei's blood, but as she passes a mirror she sees Akiko's face.

Mamoru believes their current reality is fake, a copy of the real world where time has folded back on itself.

He believes the pylon reaches the point where two worlds intersect, and that is where Mother will pass from the fake reality into the real one.

Akiko exerts control over her body, and kills herself by plunging the Annunaki Remains into her stomach, injuring Mother, and allowing Mamoru and Ikuko to destroy her.

Unable to tell if what he is seeing is reality or an illusion, he screams and opens fire on the yamibito, gunning down many as they flee.

[10] Eurogamer's Kristan Reed said that the game improved on many of the problems of the predecessor (especially the difficulty level and trial-and-error nature of the gameplay), but simultaneously fell somewhat short of the original.

[12] VideoGamer.com's Chris Pickering (a fan of Siren) also said that the game removed many of the problems inherent to the original but fell short in many respects.

Siren was directed by Yukihiko Tsutsumi and stars actors Yui Ichikawa, Leo Morimoto, Naoki Tanaka, Hiroshi Abe, Naomi Nishida, Suzuki Matsuo, Kyûsaku Shimada, Mai Takahashi, and Jun Nishiyama.