Star Force

Star Force (released in North America by Video Ware in the arcades as Mega Force) is a vertical shoot 'em up arcade video game made in 1984 by Tehkan (now known as Tecmo). In Japan, it is considered to be a monumental work among shooting games. There have also been caravan tournaments for the game in Japan. Source: Wikipedia, "Star Force", available under the CC-BY-SA License.