World of the Rider War

thumb|The backdrop for the World of the Rider War.
 was the confluence of the Nine Worlds into one reality, where the Rider War occurred. Before Tsukasa traversed the worlds, the backdrop detected all nine of the Heisei Riders, the DenLiner, Dragredder, Castle Doran, and Ryokuōzaru rushing at Decade. When Tsukasa returned, the backdrop changed to depict the collision of the worlds. 
==History==
Due to the existence of Decade being the sole catalyst of the convergence of the A.R. Worlds, the nine previous Heisei Riders fought against Decade in an one-versus-all battle for their survival. After Tsukasa lost his memories, he traversed through the worlds starting with the World of Kuuga.
After returning from the World of Televi-Kun, Tsukasa revisited this world upon accepting his title as the Destroyer of Worlds and ascending to Violent Emotion. However having developed an heroic nature through befriending the A.R. World Riders when he had amnesia, he willingly allowed Natsumi Hikari to kill him and end the merge, allowing the worlds to once again separate.
==Gallery==
T17.jpg|Tsukasa's capture photo in the World of the Rider War
T18.jpg|Tsukasa's capture photo in the World of the Rider War
==Notes==
*The backdrop mirrors the very first opening scene of the series. 
==Appearances==
* Kamen Rider Decade
**Episode 30: Rider War: Prologue
**Episode 31: The Destroyer of Worlds
**Kamen Rider Decade: The Last Story
==Navigation==
Category:Kamen Rider Decade
Category:A.R. Worlds