for a direct hit on the exhaust port target. If the player is successful, the Death Star explodes and the player is awarded a bonus shield, to a maximum of six (can be set internally for a maximum of eight). Should the player fail to hit the exhaust port, a shield is lost and the player must attempt the trench again. If the player manages to destroy the Death Star without firing at anything but the exhaust port, a bonus is awarded for "using the Force." The game then resets to the first phase. Each successive wave greatly increases the difficulty; TIE Fighters shoot more often, artillery bunkers and laser towers appear in the second phase, and obstacles appear in the trench during the third. Unlike the movie, where the units shoot beams similar to lasers, the enemy units in this game shoot projectiles resembling fireballs, which give the player a chance of destroying the shots. Development Development on the game started in 1981 under the title "Warp Speed" and was initially headed up by Ed Rotberg (who also worked on the vector-based Battlezone). Rotberg left Atari in October 1981, after which Atari signed a licensing agreement with Lucasfilm and finished the game. Ports Star Wars was converted first by Parker Brothers (with development by Imagic) in 1983 and 1984 to the Atari 2600, Atari 5200, the Atari 8-bit family, ColecoVision, and Commodore 64. The ColecoVision version was programmed by Wendell Brown. The same game was converted again, in 1987 and 1988, for the Amiga, Atari ST, Amstrad CPC, ZX Spectrum, Acorn Electron and BBC Micro; the game was also converted again for the Atari 8-bits and the Commodore 64. All conversions were developed by UK-based Vektor Grafix (the Atari 8-bit version by Zeppelin Games being an exception) and were published in Europe by Domark. That same year Broderbund acquired the rights to develop Star Wars games from Lucasfilm. Broderbund published the Macintosh, Commodore 64, and MS-DOS versions of the arcade game in North America in 1988, in addition to republishing the Atari ST and Amiga versions in 1989. The Amiga and Atari ST allow mouse control and include digitized sound effects. The Macintosh version contains sampled speech from the films, but has no in-game music other than a monophonic theme during the "attract" mode. Star Wars also appears in the GameCube game Star Wars Rogue Squadron III: Rebel Strike