Category:A.R. Worlds

Originally, Darren only knew that their destinations were nine A.R. Worlds to finish their journey. As the story progressed, they realized that their journey doesn't end at the ninth world, but further more towards new worlds, until DCD connects these worlds' stories through him. The A.R. worlds are alternate realities in DCD's point of view.

Nine Worlds

 * World of Kuuga (native world of Yusuke Onodera)
 * World of Vampire King (native world of King Scott and Kiva-la)
 * World of Dragon Knight (native world of Shinji Tatsumi)
 * World of Spade Warrior (native world of Kazuma Kendate)
 * World of Phi (native world of Takumi Ogami)
 * World of Agito (native world of Shouichi Ashikawa)
 * World of Electric King (in the main universe- where the Taros are, and the originating home of the Kamen Riders, neighbors with World of Shinkenger)
 * World of Beetleborg (native world of Souji)
 * World of Echo Demon (native world of Master Asumu)

New Worlds

 * World of Negatives (native world of the Dark Riders)
 * World of Diend (native world of Daiki Kaito)
 * World of Shinkenger (in the main universe- where the Shinkengers and Super Sentai are, neighbors with World of Den-O)
 * World of Black RX (native world of an alternate (RX) Kotaro Minami)
 * World of Black (native world of an alternate (Black) Kotaro Minami)
 * World of Amazon (native world of an alternate Daisuke Yamamoto)
 * World of X-Rider (origin of Dai-Shocker's Apollo Geist)
 * World of Stronger (S.I.C. Hero Saga Kamen Rider Decade: World of Stronger)
 * World of the Rider War (the point of connection where the A.R. Worlds would merge, excluding World of Den-O and World of Shinkenger for being in a same world in the main universe)

Other

 * World of G (native world of Goro)
 * Natsumi Hikari's homeworld
 * World of DCD (native world of Tsukasa Kadoya, despite having 'no story of his own')
 * World of Televi-Kun (Special Adventure DVD)
 * World of Net (Net Movies)
 * World of alternate Kamen Rider Skull
 * World within the Magic Stone (referred to by Decade as the 'World of Wizard')
 * World of the Sengoku Period (native world of Bujin Riders)

Worlds with no relation to Decade

 * Magic Land - An alternate world in the Kamen Rider Wizard universe.
 * World of Soccer (or unofficially known as 'World of Gaim' created by Lapis where the alternate Gaim Riders compete in a Soccer tournament as opposed to Dancing, as well as freed from Inves invasions.)

Novel
In the novel re-imagination of the Kamen Rider Decade TV series, Kamen Rider Decade: The World of Tsukasa Kadoya ~The Garden Inside the Lens~, the Nine Worlds are not alternate realities, but in fact the original worlds. The Hikari Studio group has already traveled to 6 different worlds when the novel begins, leaving only Den-O, Kuuga and Kabuto’s world unexplored.