Rad Spencer (Japanese: ラッド・スペンサー, Hepburn: Raddo Supensā), also known as Nathan Spencer in certain games, is a fictional character created by Capcom and the protagonist of the Bionic Commando series. Nathan Spencer is a prototype bionics-enhanced soldier who is mainly noted by video game reviewers due to his "Bionic Arm" (one of the earliest grappling hooks in video games) and (for most of his early video games) his inability to jump. Outside the Bionic Commando series, the character appeared in the Marvel vs. Capcom series. Nathan's design changed since his introduction, receiving both praise and criticism.