Icon-decade.png This article is about a/an alternate reality/A.R. World (another rider's world) in Kamen Rider Decade.

The backdrop for the World of the Rider War.

A new backdrop of the World of the Rider War presented in Movie War 2010.

The World of the Rider War (ライダー大戦の世界 Raidā Taisen no Sekai) is an iteration of the reality where the Rider War takes place and the confluence of the Nine Worlds. The backdrop used to enter this world depicts all nine of the Heisei Riders, the DenLiner, Dragredder, Castle Doran, and Ryokuōzaru rushing at Decade, mirroring the very first opening scene of the series, Kamen Rider Decade.




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