Nine universes of the previous Kamen Riders from the Heisei era are merging into one, something that would destroy all the worlds. To prevent this, Tsukasa Kadoya transforms into Kamen Rider Decade and is told that to protect his own world he must travel to all of the other Kamen Riders' worlds (Another Rider's worlds) and eliminate the anomalies in those worlds. Along the way, confronting the mysterious Narutaki and the thief Daiki Kaito, they are joined by Yusuke Onodera of the World of Kuuga and Kivala of the World of Kiva.
E1: Rider War▶ PLAY
E2: The World of Kuuga▶ PLAY
E3: Transcendence▶ PLAY
E4: Second Movement ♬ Kiva the Prince▶ PLAY
E5: Qualifications of the Biting King▶ PLAY
E6: Battle Trial: Ryuki World▶ PLAY
E7: The True Culprit's Super Trick▶ PLAY
E8: Welcome to Blade Cafeteria▶ PLAY
E9: Blade Blade▶ PLAY
E10: Phantom Thief of Faiz Academy▶ PLAY
E11: 555 Faces, 1 Treasure▶ PLAY
E12: Reunion: Project Agito▶ PLAY
E13: Awaken: The Soul Tornado▶ PLAY
E14: Super Den-O Beginning▶ PLAY
E15: Here Comes Super Momotaros!▶ PLAY
E16: Warning: Kabuto is Out of Control▶ PLAY
E17: The Path of Grandmother's Flavor▶ PLAY
E18: Missing Hibiki▶ PLAY
E19: Journey's End▶ PLAY
E20: The Dark Riders of Nega World▶ PLAY
E21: Going Through the Complete Rider Album▶ PLAY
E22: Diend is Wanted▶ PLAY
E23: End of Diend▶ PLAY
E24: The Samurai Squadron Appears▶ PLAY
E25: Corrupt Rider, Go Forth!▶ PLAY
E26: RX! Great-Shocker Invasion▶ PLAY
E27: BLACK×BLACK RX▶ PLAY
E28: Amazon, Friend▶ PLAY
E29: The Strong Naked Strongman▶ PLAY
E30: Rider War: Prologue▶ PLAY
E31: The Destroyer of Worlds▶ PLAY