The Compati Hero Series is a video game series published exclusively in Japan by Banpresto and Namco Bandai Games (formerly Bandai) that began in 1990, that serves as crossover between Ultraman, Kamen Rider (also known as Masked Rider) and Gundam. It was the first video game series to involve a crossover between animated giant robots and live action tokusatsu heroes from different established franchises. The series makes this possible by using caricaturized versions of the characters (officially referred as "SD" or "Super Deformed" characters), which allowed the different heroes and villains to co-exist and interact with each other without the need to reconcile their contrasting styles and settings.