|This article is about a/an rider form used by several identities in the Kamen Rider Series.|
Generation 1 may refer to any of the following characters.
G1 is the earliest model of the Tokyo Metropolitan Police's G-Series program, which was designed to fight the unidentified lifeforms. The G1 model is an armored exosuit that is designed to emulate Unidentified Lifeform #4, even resembling him in appearance. At some point, the prototype was considered a failure and put in storage, but the research data on its development laid the groundwork for future models of G-Series weapons.