''Galaga'' is a fixed shooter arcade game and the sequel to ''{{Galaxian}}''. It was released by Namco in 1981; the US version was released the same year under license to Midway.

The objective of ''Galaga'' is to score as many points as possible by destroying insect-like enemies. The player controls a fighter spaceship that can move left and right along the bottom of the playfield. Enemies fly in groups into a formation near the top of the screen, then begin flying down toward the player, firing bombs at and attempting to collide with the fighter. Occasionally, a "boss Galaga" attempts to capture the player's fighter using a {{tractor beam}}. If successful, the fighter joins the formation and must be freed by the player (using another ship and costing him/her a life), enabling him/her to control two ships simultaneously and doubling the players' firepower. Galaga '88 even allowed the player to do the same with a third ship. The game is over when the player's last ship is destroyed or captured.

''Galaga'' introduces a number of new features over its predecessor, ''{{Galaxian}}''. Among these are a realistic explosion sound that occurs when the player loses a life, a count of the player's "hit/miss ratio" at the end of the game, and a bonus "Challenging Stage" that occurs every four levels, in which a series of enemies fly onto and out of the screen in set patterns without firing at the player.

Galaga is one of the few classic arcade games to still be profitable. It was released in a combination arcade game with ''Ms. Pac-Man'' and ''{{Pac-Man}}'' in 2001.

The series has also been given a downloadable title in the same vein as Pac-Man Championship Edition: {{VideoGame/Galaga Legions}} on Xbox Live Arcade in 2008, with a Deluxe version released as part of the Namco Generations line on Xbox Live Arcade and Playstation Network in 2011.

If you want to ruin your productivity for the day, [[http://www.galagagame.net/galaga.php the game is playable here]]. [[http://www.shiftylook.com/comics/galaga And now there's a webcomic based on it written by]] [[Webcomic/DinosaurComics Ryan North]], as part of ''Website/ShiftyLook''.
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!!''Galaga'' has examples of:
* AttractMode
* BonusStage: The Challenging Stages that show up every few stages.
* BugWar
* ChainReactionDestruction: The final boss in ''Galaga '88'' is chain-explosive.
* DifficultButAwesome: Dual ships (and triple ships [[UrbanLegendOfZelda in '88 only]]) have wider shots that are easier to land on targets and minimize OneBulletAtATime, but it also effectively doubles your hitbox making it harder to dodge.
* DifficultyByAcceleration
%% * EasterEgg
* EndGameResultsScreen: At the end of the game, the screen displays the number of shots you fired, the number of shots that hit targets, and your hit-miss ratio.
* EndlessGame: Until ''Galaga '88'', there is no ending.
%% * TheEighties
* FasterThanLightTravel: Used in ''Galaga '88'' to move between stages. You can also move to other dimensions after the Challenging Stage by collection two blue crystals.
* FlawlessVictory: Destroy all 40 enemies durnig a Challenging Stage and the game will play a celebratory jingle, followed by giving you a 10,000-point bonus.
* [[spoiler:HappilyEverAfter]]: The GoldenEnding to ''88''.
* HostageSpiritLink: Subverted. If you hit a captured fighter, nothing happens other than a point bonus, because you already got punished by losing one life.
* KillScreen: After stage 255, except on the highest difficulty level.
%% * MultipleEndings: In ''Galaga '88''.
%% * NintendoHard: ''Gaplus'' and ''Galaga '88''.
* NonstandardGameOver: Getting your last ship captured instead of shot down.
%% * OlderThanTheNES
* ShootEmUp
* TractorBeam: With a side of EverythingsBetterWithSpinning. You can shoot while you're spinning, possibly hitting an enemy (including the boss capturing you, in which case you're released).
* UpdatedRerelease: The game has been given two Arrangement versions with updated graphics, music, and slightly altered gameplay: one in Arcades in 1996, and another on PSP in 2006.
* UrbanLegendOfZelda: The triple ship legend. However, it was finally made possible in ''Galaga '88''.
%% * WordPureeTitle
* YetAnotherStupidDeath: Before you get your ship captured so you can get the double ship (or triple in ''[='=]88''), '''check your life counter.''' If you have no lives left, [[GameOver you are NOT getting your upgraded ship]].
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