
Kamen Rider: Climax Heroes is a 3D crossover combat game that brings together heroes from 10 distinct Kamen Rider television series, ranging from Kuuga to Decade. The narrative takes place within the Decade universe, where the realities of the other nine Rider worlds are merging into one, and the Riders must unite to prevent total annihilation of their worlds. The gameplay resembles that of other 3D fighting titles like Tekken, with the key feature being the "Form Change" system, which lets each Rider transform during battle—even mid-combo. The primary story experience is known as "Decade Mode," where players complete a series of missions using various characters to advance the plot. The game also offers traditional Versus, Survival, and Training modes, and includes an easy-to-use control scheme designed for younger gamers.
In Decade Mode, players accompany Tsukasa Kadoya as he travels through the nine Heisei Kamen Rider universes as Kamen Rider Decade, battling other Riders and striving to stop the worlds from being destroyed. Unlike regular gameplay, Decade Mode allows customization of Decade's Form Changes and Special Attacks using KamenRide Cards and Final FormRide Cards obtained throughout the game. The missions in this mode are split into three difficulty levels, with the simplest challenges found in Level 1 and the most difficult in Level 3. Players must advance through Level 1 to unlock access to Levels 2 and 3.