This series premiered in 2009 after the finale of Kiva and was billed as the 10th anniversary of the Heisei Rider Series, lasting for only 31 episodes. Tsukasa Kadoya is a photographer with no memory of his past and whose photos never turn out quite right. When dimensional portals open up, trapping his only friend Natsumi Hikari with the various monsters other Kamen Riders have faced, she finds the Decadriver which Tsukasa instinctively uses to transform into Kamen Rider Decade, a being Natsumi has seen in her nightmares. While the world seems to collapse around him, everything freezes and he is approached by Wataru Kurenai who tells him that the multiverse is collapsing, and this world will be destroyed unless he travels to the worlds of the other Kamen Riders and fix them in order to prevent the destruction of every world. However, the mysterious Narutaki disseminates rumors throughout the other realities that Tsukasa will be the destroyer of all worlds, causing the Kamen Riders to turn on him.

The story revolves around the nine previous universes of the Heisei Kamen Riders merging into one, something that would destroy all the worlds. To prevent this, Tsukasa Kadoya transforms into Kamen Rider Decade and is told that to protect his own world he must travel with Natsumi and her grandfather to the other Kamen Riders' Worlds called A.R. Worlds (Another Rider's World or Alternate Reality World) and eliminate or help the anomaly in that world. Along the way, confronting the mysterious Narutaki and the thief Daiki Kaito, they are joined by Yusuke Onodera of the World of Kuuga and Kivala of the World of Kiva.

To fit with the printing motif of the series, the main Kamen Riders of the series follow the CMYK color model: Decade is magenta, Diend is cyan, and Kuuga (Rising Ultimate Form) is black and yellow. In the Cho-Den-O Trilogy film Episode Yellow: Treasure de End Pirates, Diend is the primary character, emphasizing the yellow accents on his Diendriver and the enhanced Kamen Ride Diend card. 

  Rider War

The Rider Army (ライダー軍 Raidā Gun ), first revealed in Natsumi Hikari's dream, composed of many Kamen Riders, all of whom were seemingly defeated by Kamen Rider Decade. However, Kamen Rider Kuuga survived the initial battle, assuming Ultimate Form to confront Decade once again with the two seemingly destroying each other in the ensuing battle. As Narutaki explains to Natsumi, the dream is a predestined event in which Decade will destroy all the worlds.

Cast   : Masahiro Inoue as Tsukasa Kadoya (Kamen Rider Decade)

             Kimito Totani as Daiki Kaito  (Kamen Rider Diend)

             Ryouta Murai as Yusuke Onodera (Kamen Rider Kuuga)

             Kanna Mori as Natsumi Hikari

             Renji Ishibashi as Eijiro Hikari

             Tatsuhito Okuda as Narutaki

Genre   : Tokusatsu                                                         Created By : Shotarou Ishinomori

Distributor : Toei Company                                            Episode : 1 ~ 31

Period   : 25-Jan-2009 ~ 30-Aug-2009                          Subtitle   : English

Language : Japanese                                                       File Format : mp4

This DVD is a copy version, downloaded from Japanese website and with subtitle (English).