12Riven: The ΨCliminal of Integral

On May 20th, 2012, high school student Renmaru Miyabido receives an ominous message on his phone warning him that his friend Myu Takae will die atop the abandoned Integral building at noon. Meanwhile, police detective Narumi Mishima receives another message, apparently from her old classmate Makoto Yukizumi, which asks her to save Myu's life. According to the message, Myu's death will result in the success of the 'Second Eclipse Plan' - a plot by unknown conspirators that would bring about the destruction of time. Rushing to Integral, Renmaru and Narumi soon find themselves in a race against time to save Myu - and possibly the world.

12Riven: The Ψ Climinal of Integral is a science fiction visual novel and the fourth instalment of the Infinity series. The story is told from the perspective of both Renmaru and Narumi and the player assumes the role of both characters at different points in the game. The gameplay consists of reading text overlaid on illustrated backgrounds and making decisions which affect the outcome of the story. There are multiple achievable endings, but only one 'true ending'.

The PSP port which came a year after the PS2 and Windows versions features new CG event scenes, newly recorded voice-acting and a renewed soundtrack. Some of the older CG events were redrawn due to complaints about their quality in the original PS2 release.