, 1h38
Genres Science fiction, Action, Adventure
Themes Sports films, Martial arts films, Superhero films
Actors Masahiro Inoue, Gaku Sano, Tomohisa Yuge, Renn Kiriyama, Kento Handa, Shunya Shiraishi
Roles Masato Kusaka / Kamen Rider Kaixa
Rating61%
The film opens with Zawame City ravaged by a fight between the Heisei Riders and the Shōwa Riders, before going back in time to the week before, when workers from the Yggdrasill Corporation are dragged by an unknown force to underground. Upon hearing rumors about it, Kouta Kazuraba investigates the area with his friend Mai Takatsukasa, just to fall into a hole as well and find themselves in an underground, alternate version of the city. The two find a boy called Shu, who has the power to revert things and is certain that he has something important to do, but he does not remember what it is. Kouta and Mai then bring the boy to the surface and Takeshi Hongo appears demanding them to hand him over, when soldiers from the Underground Badan Empire appear to kidnap him as well and Takeshi transforms into Kamen Rider 1 to allow Kouta, Mai, and Shu to escape. Badan then launches an attack on the surface, and Armored Riders Baron, Ryugen, and Zangetsu Shin appear to fight back alongside Kouta, who transforms into Armored Rider Gaim as well to protect his friends. However, Gaim is attacked by Kamen Rider Fifteen, who is also seeking the boy and also possesses a Lockseed that allows him to transform into the Rider Arms of the 15 Heisei Riders, and when Kamen Riders 1, 2, and V3 appear to fight him, Shu uses his powers to escape with Gaim and Mai.

, 1h21
Directed by Ryuta Tasaki
Genres Science fiction, Action, Adventure
Themes Sports films, Martial arts films, Superhero films, Political films, Dystopian films
Actors Kento Handa, Yuria Haga, Kohei Murakami, Mokomichi Hayami, Mei Kurokawa, Mirai Shida
Rating72%
In alternate moment of the series timeline, set in the near future, Smart Brain has accomplished its goal of world domination — with 90% of Earth's population being Orphnochs while the human race had diminished to near-extinction. Takumi Inui, the user of the Faiz Gear, was regarded as mankind's savior until he was presumed killed during an attack by Smart Brain's Riotroopers. Since then, his friend Mari Sonoda has formed a human resistance group that have staged attacks on Smart Brain's headquarters in an attempt to steal the top-secret "Emperor Belts," but to no avail. The Orphnochs Yuji Kiba, Naoya Kaido and Yuka Osada wish to see both Orphnochs and humans co-exist in peace, but they are not taken kindly by the humans while Smart Brain chief Kyoji Murakami (who is now reduced to a head in a water tank) reminds them that humans no longer have a place on Earth. Murakami then discloses the existence of the Emperor Belts by introducing the Orphnoch Leo, who changes into the powerful Kamen Rider Psyga.