Timeline/Alternate

''The events in these timelines take place on parallel worlds. The World of Den-O (Episode 14,15 in Decade and Cho Den-O & Decade Neo Genaration: The Onigashima Warship), The World of the Rider War (Movie Wars), Diend (Cho Den-O: Episode Yellow), and Shinkenger/Super Sentai (Super Hero Taisen) have connections with the main timeline.''

Icon-kuuga.png World of Kuuga

 * To be added

Icon-kiva.png World of Kiva

 * To be added

Icon-ryuuki.png World of Ryuki

 * To be added

Icon-blade.png World of Blade

 * To be added

Icon-faiz.png World of Faiz

 * To be added

Icon-agito.png World of Agito

 * To be added

Icon-kabuto.png World of Kabuto

 * To be added

Icon-hibiki.png World of Hibiki

 * To be added

Icon-decade.png World of Negatives

 * To be added

Icon-decade.png World of Diend

 * To be added

Icon-supersentai.png World of Shinkenger

 * 2009: In this world, the heroic Samurai Sentai Shinkenger fights the monstrous.
 * Arriving in the World of Shinkenger, Daiki Kaito introduces himself to Shinken Gold, Genta Umemori, as a Kamen Rider while claiming his as a treasure.
 * The Hikari Studio arrives in the World of Shinkenger where Tsukasa Kadoya - Kamen Rider Decade - adopts the role of a while Shinken Gold continues his pursuit of Kaito, which ends with Kaito losing his Diendriver to the Ayakashi Chinomanako who uses it to become this world's first Kamen Rider, observed by Narutaki as an abominable disturbance.
 * Tsukasa continues his act as a Kuroko as the Shinkengers face an influx of Nanashi brought about by the strange new entity. Natsumi Hikari witnesses the Shinkengers' battle against the . After being warned by Narutaki that the world will be destroyed by "Decade", Takeru confronts Tsukasa Kadoya.
 * Inspired by Hikoma's relationship with Takeru, Tsukasa joins the Shinkengers and Kuuga in destroying the Ayakashi Rakider before returning to the Hikari Studio which he now accepts as home as it leaves for the next world while Daiki Kaito is forced to return the Ika Origami to Genta in exchange for his recovered Diendriver.

Icon-rx.png World of Black RX

 * To be added

Icon-black.png World of Black

 * c. 2009: In this world, Kohtaro Minami continues his fight against Golgom as Kamen Rider Black well into middle age, whereas his prime counterpart saw the cult fall at the age of 20.
 * Apollo Geist recruits Golgom into Dai-Shocker.
 * Originally from the World of Black RX, Joe the Haze somehow ends up in this world and aids Kohtaro in his fight.
 * As Black, Kohtaro meets Decade who had followed Apollo Geist from the World of Black RX. He attempts to attack Decade, but is held off by a Kamen Rider Femme summoned by Diend.
 * On the following day, Kohtaro reconsiders his view of Decade after witnessing his heroic actions, revealing the situation of his world to him. Soon after, Kohtaro is summoned via Rider Card to the world of Black RX, where he briefly fights alongside his counterpart against Dai-Shocker, destroying the Rhinoceros Mutant and forcing Guy to fall back to another world.

Icon-amazon.png World of Amazon

 * To be added

Icon-x.png World of X-Rider

 * Apollo Geist of GOD is slain in battle by X-Rider. He is later, however, revived to serve in Dai-Shocker.

Icon-krorig.png World of Kamen Rider

 * To be added

Icon-stronger.png World of Stronger

 * To be added

Icon-kr.png World of the Rider War

 * To be added

Icon-decade.png World of Decade

 * To be added

Icon-decade.png World of TeleviKun

 * To be added

Icon-decade.png World of Net

 * To be added

Icon-g.png World of G

 * To be added

Icon-wizard.png World Within the Magic Stone

 * Many years ago: The evil wizard Amadum is exiled to this parallel world where humans mature into monsters, becoming its ruler.
 * c. 2000s: Haruto and Koyomi are born.
 * c. 2013: Seeking to free himself and unleash his monstrous army upon the prime world, Amadum pursues the Rider Rings held by Haruto, who uses them to summon the prime Haruto Soma and Kosuke Nitoh as well as the first 13 Heisei Riders to save him and Koyomi from the fate of becoming monsters. Lastly, he briefly brings forth a new Kamen Rider named Gaim.
 * Standing with Tsukasa Kadoya, Haruto and the Heisei Riders oppose Amadum's attempt to complete the Cross of Fire, wiping out his army of monsters. Though Amadum seizes the heroic Riders' powers derived from evil, he is ultimately defeated when Gaim returns, with all fifteen Heisei Riders providing their Rider Kicks to destroy him. As the Riders return to their homeworlds, the prime Haruto leaves his Infinity Ring to his counterpart.

World of the Sengoku Period

 * c. 2013: In an alternate Sengoku World, 14 factions with their own Bujin Riders fights in a war to dominate Japan. The ruthless and powerful Bujin Gaim, who sided with nobody but Kaijins, appears and begins to slaughter every one of his fellow Bujin Riders, including Ieyasu's Bujin Wizard.