Galaga was released in September 1981 in Japan.
Although Galaga was a superior game, it didn't sell the large numbers that "Galaxian
" did. One of the first games with a bonus stage.
The game 'rolls over' at 999,990 points. The 1P score counter is six digits, but the 2P counter is seven digits. Therefore, most good players start a 2-player game and play exclusively on the 2P side so their score won't 'roll over' at 999,990. After the 1,000,000 mark, new Fighters are no longer awarded.
What happens after finishing Stage 255 depends upon the skill level set in the DIP switches:
On the easy skill, the game resets.
On the medium skill, the game flips to "Stage 0" which plays as a strange cross between the 2nd Challenging Stage and a regular level where the enemies shoot. The game will advance to Stage 1 after completion, and the game will get easy again.
On the hard skill setting, the words "Stage 0" stay on the screen forever. No more enemies ever appear. The player can continue to move the ship and fire, but there is no way to advance to the next level, or to die. To play again, the machine must be reset.
On the hardest skill, the game flips to "Stage 0" which plays like Stage 1 (no extra enemies when flying onto the screen), but it is still as difficult as Stage 255. The game will advance to Stage 1 after completion, and the game will get easy again.
If you have more than seven extra Fighters, the marker for the screen will only show 7 1/2 (!) Fighters remaining. Additional extra Fighters will still be credited, even though they won't show on the screen.
In Japan, the Bees are referred to as 'Zako' and the Butterflies are referred to as 'Goei'.
Stephen Krogman holds the official record for this game with 15,999,990 points.
A Galaga unit appears in the 1983 movie 'WarGames', the 1983 movie 'Spring Break' (being played by one of the main characters), the 1984 movie 'The Karate Kid,' the 1987 movie 'Planes, Trains and Automobiles', and the sitcom 'Two and a Half Men', Season 5, Episode 2 (People Who Love Peepholes), and was shown in 2012 movie 'The Avengers' (a agent soldier was surprised playing in the Helicarrier computer).