''Bite the dust, Space Cadet!''

''Gorf'' is an arcade game released in 1981 by {{Midway|Games}}, whose name was advertised as an acronym for "Galactic Orbiting Robot Force" . It is a multiple-mission fixed shooter with five distinct modes of play, essentially making it five games in one: an innovation at the time, as other video games had a level to clear, only to have a different level that looked the same but was a bit harder. It is well-known for its use of synthesized speech, a new feature at the time.

''Gorf's'' objective is to simply destroy all enemies. The player controls a spaceship that can move slowly left, right, up and down. (Its vertical movement is limited to the lower one-third of the screen.) The ship can fire a single shot (called a "quark laser" in this game), which travels slowly up the screen. Unlike similar games, where the player cannot fire again until their existing shot has disappeared, the player can "re-fire" their laser at any time, causing their existing shot to disappear immediately (if it hasn't already).

Gameplay is broken up into five distinct "missions", each one essentially a minigame in its own right. Successfully completing all five missions will increase the player's rank and loop back to the first mission. The game continues until the player loses all of their lives. The player can advance through the ranks of Space Cadet, Space Captain, Space Colonel, Space General, Space Warrior, and Space Avenger, with a higher difficulty level at each rank. Along the way, a robotic, synthesized voice heckles and threatens the player, often calling the player by their current rank (for example, "Some galactic defender you are, Space Cadet!"). Some versions of Gorf also display the player's current rank via a series of lit panels in the cabinet.

Vague collision detection was a feature of the game intended to shorten the playing time - enemy shots that did not appear to actually impact on the ship object would still destroy it if they passed in close proximity.

''Gorf'' is well-known for introducing or popularizing two new features (for its time) to the video game market. Its most notable feature is its robotic voice, powered by the Votrax speech synthesis chip. Most games, even today, that feature human and robot speech use digitized voice samples rather than a speech synthesizer. Also, ''Gorf'' is one of the first games to allow the player to buy additional lives before starting the game. Most games offer a predetermined number of lives (usually three) and allow the player to earn additional lives throughout the game. ''Gorf'', which was usually set to offer two lives per coin, allows the player to insert extra coins to buy up to seven starting lives.

''Gorf'' was originally intended to be a tie-in with ''Film/StarTrekTheMotionPicture'', but when the game designers read the film's script, they realized that the concept would not work as a video game and changed its title. Even so, the player's ship bears a passing resemblance to the Starship Enterprise flipped upside-down.
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!!''Gorf'' has examples of:

* AttackItsWeakPoint: The flagship on Mission 5.
* BossBattle
* BribingYourWayToVictory: Insert more coins for [[OneUp extra lives]].
* TheEighties
* FinalBoss: Widely credited with [[TropeMaker creating]] the concept.
* {{Galaxian}}: The third level is actually called "Galaxians". Appears only in the arcade original, as the home versions remove it due to either space limitations or licensing issues.
* GameplayRoulette: Each stage plays out somewhat differently.
* HaveANiceDeath: When you (inevitably) lost, the game would taunt you, calling you a "Spaaaaace Cadet"
* HitboxDissonance: The player's hitbox is larger than it appears to be.
* LagCancel: Firing while a shot is still on the screen will erase that shot and fire a new one.
* RoboSpeak
* ShootEmUp
* SpaceInvaders: The first level, referred to as "Astro Battles".
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