Kamen Rider Cronus (仮面ライダークロノス, Kamen Raidā Kuronosu) is the ultimate reward in the game Kamen Rider Chronicle. Its power is awarded to the Ride-Player who manages to clear all main Bugster bosses in the game, claiming all of the Gashatrophies as proof of their victory, in order for the player to defeat the final boss, Gamedeus. To use its power requires the ultimate Bugster antibody which is resistant against all strains of the Bugster virus.