WARNING:This series contains scenes of mild violence and bloodshed. Viewer discretion is advised!
Rider Time: Kamen Rider Decade VS Zi-O -Decade Mansion's Death Game- (RIDER TIME 仮面ライダーディケイド VS ジオウ -ディケイド館のデス・ゲーム-,Raida Taimu: Kamen Raidā Dikeido Tai Ji-Ō -Dikeido-Kan no Desu Gēmu-) a three-episode TTFC-exclusive miniseries serving as the third installment of the Kamen Rider Zi-O Spin-off series. In the special, Tsukasa, Sougo, and several of their allies are forced to play a deadly game behind closed doors while uncovering the secrets behind the appearance of an Another Ryuki.
Various people with different backgrounds, including an unusual Sougo Tokiwa, are waking up finding themselves stranded in a house on an isolated island and forced to participate in a death game by a mysterious masked clown. After each round, a loser is killed by a monster emerging from mirrors. As the body count gradually increases, a strange passerby suddenly appears.
After a trailer that contained a Tsukasa Kadoya subliminal message premiered on October 31st, it was announced at the end of An episode of Kamen Rider Blades (a Kamen Rider Saber spin-off episode on TELASA), that a new collaboration between TELASA and Toei Tokusatsu Fan Club will be new episodes for Kamen Rider Zi-O's spin-off, Rider Time. They both premiered on February 9, 2021, but this one will air on TTFC while the other on TELASA.