Gallag (c) 1982.

>>> TECHNICAL DETAILS
---------------------
Main CPU : (4x) Z80 (@ 3.072 Mhz)
Sound Chips : Namco 3-channel WSG, discrete circuitry (for the ship explosion sound)
Screen orientation : Vertical
Video resolution : 224 x 288 pixels
Screen refresh : 60.61 Hz
Palette colors : 96
Players : 2
Control : 2-way joystick
Buttons : 1

>>> TRIVIA
----------
This version looks and plays exactly like the original Galaga except that it says GALLAG on the title screen and 1982 where the Namco copyright would normally be.
Original release :
Namco's Galaga (September 1981)
Licensed releases :
Midway's Galaga [Upright model] (December 1981)
Midway's Galaga [Mini-Myte model] (December 1981)
Midway's Galaga [Cocktail Table model] (December 1981)
Unofficial releases :
Gallag
Uchida's GATsBEe (hack)

>>> OTHER GAME RESOURCES
---------------------
Game's rom.