Forbidden Siren 2 (PlayStation 2)
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Annihilation mini-game
Successfully complete all missions, including secondary objectives to unlock the Annihilation mini-game.
Kunitoris mini-game
Obtain File #79 in Mamoru Itsuki's stage on the Bright Wing (15:00) to unlock the Kunitoris mini-game.
Play as a Shibito
Successfully complete all missions, including secondary objectives on the Hard difficulty setting to unlock a bonus stage where you play as a Shibito.