is a sequel to the original Ryuki TV series, which features the shocking return of the Mirror World's Rider War. Takamasa Suga, Satoshi Matsuda, Hassei Takano, Satoshi Ichijo, Tomohisa Yuge, Takashi Hagino, and Tsuyoshi Koyama reprise their respective roles, in addition to guest featuring the main actors from the current series airing Kamen Rider Zi-O, So Okuno and Gaku Oshida. It also re-introduces Kamen Rider Abyss from Kamen Rider Decade to the main universe. The theme song is "Go! Now! ~Alive A life neo~" performed by Rica Matsumoto. Kamen Rider Outsiders is a web-exclusive crossver series of Toei Tokusatsu Fan Club between Ex-Aid, Zero-One, 555, Ryuki, Decade, and Saber released on October 16, 2022, which is a direct sequel to the web-exclusive Kamen Rider Genms series. Movie Battle Royale is a crossover film released on December 23, 2022, which mainly stars the casts of Kamen Rider Revice and Geats, while four Riders (Ryuki, Knight and Ouja, including Ryuga) from Ryuki act as supporting casts to commemorate the series' 20th anniversary. Takamasa Suga, Satoshi Matsuda, and Takashi Hagino reprised their respective roles. The film was written by Yuya Takahashi and Hanta Kinoshita and directed by Takayuki Shibasaki. Production The Kamen Rider Ryuki trademark was registered by Toei on November 1, 2001. S.I.C. Hero Saga Ryuki had two separate S.I.C. Hero Saga side stories published in Monthly Hobby Japan magazine. The first was titled and featured original characters and his Mirror Monster the . The second S.I.C. Hero Saga story is an alternate telling that features Ouja Survive from Advent Calendar and also introduces . Advent Calendar ran from August to December 2004 and World of If ran from June to August 2005. Advent Calendar chapter titles World of If chapter titles Novel , written by Toshiki Inoue, is part of a series of spin-off novel adaptions of the Heisei Era Kamen Riders. The novel was released on August 30, 2013. Video game A video game based on the series, developed by Digifloyd and published by Bandai, was released in Japan in 2002 for the PlayStation. It is a basic fighting game where all thirteen Riders are playable with all the forms seen in the show, movie, and specials (except for the Alternatives and Ouja's Blank Form, seen in the Episode Final movie). Four of the Contract Monsters (Volcancer, Metalgelas, Destwilder, and Gigazelle), the two Zebraskulls (Iron and Bronze), and Megazelle are