Senator Steven Armstrong is the main antagonist of the 2013 video game Metal Gear Rising: Revengeance and its Jetstream Sam DLC.
He is an ambitious Colorado senator who plans to get elected as the next U.S. President so he can convert the country into a social Darwinist regime that he believes would allow every citizen to fight their own wars and for what they truly believe in, and one of the two archenemies and the evil counterpart of Raiden.
He is voiced by the late Unshō Ishizuka in Japanese and Alastair Duncan in English.