Aired in 2009 after the finale of Kiva and was billed as the 10th anniversary of the Heisei Rider Series, lasting for only 31 episodes.

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. The 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.