The twelfth installment in the Kamen Rider Series, it was a joint collaboration between Ishimori Productions and Toei, and it was shown on TV Asahi from February 3, 2002 to January 19, 2003.

They form contracts with monsters from the mysterious Mirror World (ミラーワールド, Mirā Wārudo), a parallel dimension opposite to our own in which only the Kamen Riders can exist.

The Riders draw on their monsters' strength in exchange for feeding them the life force of the creatures they destroy.

During his investigations of these incidents, Shinji Kido – an intern at the online news service ORE Journal – discovers one of the Advent Card decks at an apartment where every reflective surface has been covered by a newspaper.

He is about to be killed by a powerful dragon named Dragreder when he is saved by a Kamen Rider Knight: Ren Akiyama.

Shinji Kido's life, working as an employee at ORE Journal, takes a sharp turn after being pulled into the Mirror World by a Mispider.

Luckily, he was saved by a Kamen Rider, Ryuki (Koichi Sakakibara, portrayed by Keiichi Wada).

However, Sakakibara could no longer go on due to the severity of his injuries and passed his Card Deck to Shinji, allowing him to become the next Ryuki and defeat the monster.

Kamen Rider Ryuki the Movie: Episode Final (劇場版 仮面ライダー龍騎 EPISODE FINAL, Gekijōban Kamen Raidā Ryūki Episōdo Fainaru) is a film released on August 17, 2002, doubled-billed with Ninpu Sentai Hurricaneger: Shushutto the Movie.

Amidst the impending chaos of the fight between the Riders, Shinji discovers an unbelievable truth about the relationship between Yui Kanzaki and the Mirror World, as well as discovering the existence of his Mirror World doppelganger, Kamen Rider Ryuga.

The storyline 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.

[10] Kamen Rider Geats × Revice: Movie Battle Royale (仮面ライダーギーツ×リバイス MOVIEバトルロワイヤル, Kamen Raidā Gītsu Ribaisu Mūbī Batoru Rowaiyaru) 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.

A video game based on the series, developed by Digifloyd and published by Bandai, was released in Japan in 2002 for the PlayStation.

Four of the Contract Monsters (Volcancer, Metalgelas, Destwilder, and Gigazelle), the two Zebraskulls (Iron and Bronze), and Megazelle are also playable.