Voorhees, Gerald A.; Call, Joshua; Whitlock, Katie (2015). Guns, Grenades, and Grunts: First-Person Shooter Games (անգլերեն). Bloomsbury. ISBN9781441191441. «Some of the earliest video games, such as the mainframe game Spacewar! (1962) and commercial games based on it like Galaxy Game (1971) and Computer Space (1971) also involved shooting . . . [T]hese games featured shooting from a third-person perspective.»