Kamen Rider is a two player beat 'em up based on the Japanese TV show of the same name. You play as a normal human until you transform into the titular Kamen Rider, then defeat bosses with the famed Rider Kick. Its gameplay is fairly standard but lacks throws.
Kamen Rider is a long-running super popular TV show in Japan.
For another game where you transform into a more powerful fighter, check out Metamorphic Force in the arcade.
Kamen Rider could not be a more mediocre Final Fight knock-off. The only thing that's remarkable about the combat is that you can transform into Kamen Rider, but your attacks are largely the same in that form (i.e. boring.) Nothing about this game is particularly horrible or excellent, except for the awesome "Rider Kick" animation when you beat bosses.