In Forbidden Siren 2, the sightjack system was altered to allow automatic sightjacking to the closest enemy without having to tune into its frequency. However, the player is unable to move while sightjacking and is vulnerable to attack. Via sightjacking, the player can discover a shibito's position, patrol route, locations and items of interest. Once a signal is found, it can be assigned to one of the controller's four face buttons to switch between signals.
The clarity of each target depends on the distance from the player, and the direction of the dial depends on the target's orientation to the player. The process is similar to tuning into a radio frequency, with the left analog stick serving as the dial. The game's defining feature is "sightjacking," to see and hear from the perspectives of nearby shibito, yamibito, humans, and other creatures.
Objectives are interconnected via a butterfly effect, and a character's actions in one scenario can trigger a secondary objective in another. "corpse people") and the yamibito ( 闇人, yamibito, lit. In order to complete a scenario, the player must accomplish a primary mission objective that usually involves reaching an exit point, finding an item, or subduing certain enemies (called shibito ( 屍人, shibito, lit. Like its predecessor, Forbidden Siren 2 is divided into numerous scenarios, organized chronologically in a table called the "Link Navigator". 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. Shortly after this, a group of soldiers crash land on the island.
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. In 1976, during a blackout, the entire population of the island disappeared without a trace or explanation. The game tells the story of several characters who become trapped on Yamijima Island, off the coast of mainland Japan. A film inspired by the game but featuring a different plot and characters, Siren, was released that same year. It is a sequel to 2003's Siren ( Forbidden Siren). Forbidden Siren 2 is a survival horror stealth game developed by Japan Studio's Project Siren team, and published by Sony Computer Entertainment for the PlayStation 2 in 2006.