1981, Bally Midway. American game, unofficially a sequel to Galaxians, which Midway had distributed in North America. Along with Phoenix (Taito, 1980) and Astro Blaster (1981), GORF was one of the first games to have distinct themed stages. What really set it apart was the bass-heavy sound effects and the early use of voice synthesis, representing the Gorfian robots who mock and taunt the player (“Prepare yourself for annihilation, Space Captain”).