"Star Castle is a 1980 vector arcade game by Cinematronics. The game involves obliterating a series of defenses circumferencing a stationary turret in the center of the screen. The game was designed by Tim Skelly and programmed by Scott Boden. Tim Skelly also created a number of other Cinematronics titles, including Starhawk, Armor Attack and Rip-Off. As with many other titles by the company, Star Castle was ported to the Vectrex video game console in 1983." Source: Wikipedia, "Star_Castle," available under the CC-BY-SA License.