12Riven: The Psi-Climinal of Integral

Lore & Background

The story of 12Riven takes place on May 20, 2012. High school student Renmaru Miyabidō races to the abandoned Integral building after receiving a message that his old friend Myū will die there at noon. Police detective Narumi Mishima also heads to the same location, having received a request to save a girl named Myū and prevent the 'Second Eclipse Plan,' marked with the unprecedented severity level 'XXX Lv6.' Renmaru finds Myū injured on the building's rooftop, but her attacker uses an unknown force to throw him back and threatens him with a gun. Narumi arrives just as the attacker counts down to one, pointing her gun at him.

Reader's Guide

12Riven is significant as a late entry in the Infinity series, known for its sophisticated narrative and branching storylines. The game features two player characters—Renmaru Miyabidō and Narumi Mishima—and a single 'true ending' among multiple branches. Its development was marked by KID's bankruptcy in 2006, which halted production until CyberFront acquired the intellectual properties and resumed work. The game's music, composed by Takeshi Abo, was noted by RPGFan as among his most sophisticated. The PlayStation 2 version debuted as the thirteenth best-selling game in Japan in its first week, while the PSP version sold 4,745 copies by the end of 2009. A planned Android and iOS port was announced in 2012 but never released due to CyberFront's dissolution in 2013.

Did You Know?

• The game was originally scheduled for December 6, 2007, but was delayed twice, finally releasing on March 13, 2008.
• The PC version was released both as a standalone product and as part of the Infinity Plus pack, which included three other Infinity series games.
• The game's opening theme 'Third Bridge' and ending theme 'Process' were performed by Kaori and released as a CD single on April 23, 2008, debuting at 144th on Oricon.
• A port for Android and iOS was announced by Cyberfront in 2012 but was not released because Cyberfront was dissolved in 2013.

A Game Rescued from Bankruptcy

The development history of 12Riven is inseparable from the corporate collapse that nearly erased it from existence. The title was originally being produced by KID, the studio celebrated for the Memories Off franchise and the Infinity series encompassing Never 7, Ever 17, and Remember 11, alongside SDR Project. However, when KID filed for bankruptcy in November 2006, all active projects were thrown into limbo. 12Riven and another title, Memories Off 5: Encore, both faced the very real possibility of never reaching players. The situation was resolved in 2007 when CyberFront acquired KID's intellectual properties and stepped in to resume production. Even after this rescue, the release schedule proved unstable: the game was initially slated for December 6, 2007, pushed to February 14, 2008, and finally landed on March 13, 2008 for the PlayStation 2. The PSP port followed on April 16, 2009, while PC players received both a standalone version and a bundled Infinity Plus package on April 4, 2008.

A Branching Narrative of Desperation

12Riven operates as a classic visual novel where the player advances primarily through reading the unfolding story, punctuated by decision points that send the narrative down divergent branches toward multiple endings, with only a single true ending hidden among them. The story is anchored on a single day—May 20, 2012—and follows two protagonists converging on the same abandoned structure called Integral. High school student Renmaru Miyabidō is racing his bicycle toward the building after receiving a cryptic cellphone message warning that his old friend Myū will die at its top floor by noon. Simultaneously, police detective Narumi Mishima is speeding on her motorcycle toward the same destination, responding to a request from a coworker to prevent the execution of the Second Eclipse Plan. The message carried an XXX Lv6 severity marking, a classification that had never been used before, as even a large-scale terrorist threat would only warrant a level 5. When Renmaru arrives, he discovers Myū injured and an armed attacker who seems immune to his attacks, thrown back by an unknown force. Just as the attacker counts down to force Renmaru to flee, Narumi appears and aims her weapon at the threat.

A Refined Sonic Identity

The musical landscape of 12Riven was crafted by composer Takeshi Abo, whose work across the Infinity series had grown increasingly complex and atmospheric with each entry. For this installment, the opening theme Third Bridge and the ending theme Process were both performed by vocalist Kaori, with Chomaru Shikura handling composition and lyric writing while Kōji Ueno managed the arrangements. These two tracks were packaged on a CD single released on April 23, 2008, which debuted at 144th place on the Oricon chart. The special edition of the game also included the full original soundtrack as a bonus element. When the title was ported to the PlayStation Portable, the vocal themes were re-recorded with Yui Sakakibara, who sang a new opening track titled Toki no Nai Sekai and a new ending track called Distance. Critic Neal Chandran of RPGFan observed that the Infinity series' atmosphere, story, and themes had grown progressively more sophisticated and dark with each installment, and he felt the music tracked that evolution. He described 12Riven's score as among the most refined compositions Abo had ever produced, noting that while nothing ventured outside the composer's established range, the overall result was highly refined.

Commercial Performance and Platform Legacy

12Riven found a solid audience in Japan upon its PlayStation 2 launch, claiming the thirteenth position among all best-selling video games in the country during its first week and ranking as the third-best-selling PS2 title specifically. The PlayStation Portable version, released over a year later in April 2009, saw more modest figures, closing out 2009 at the 908th position on Japan's annual sales chart with 4,745 copies moved. The PC release on April 4, 2008 came in two flavors: a standalone purchase and inclusion in the Infinity Plus bundle, which also packaged PC versions of Never 7, Ever 17, and Remember 11 alongside 12Riven. The game's platform journey did not end there. In 2012, CyberFront announced a port for Android and iOS devices, but that project never materialized because CyberFront itself was dissolved in 2013. The title's cast includes voice performances by Ai Nonaka as Myū, Masaya Matsukaze as Mei Kiridera, Rina Satō as Maina, Junichi Suwabe as Ōtemachi, Ai Shimizu as Chisato Inose, and Naozumi Takahashi as Omega Inose, lending the narrative a layered vocal presence.