Galaxian Part X (c) 1979.

>>> TECHNICAL DETAILS
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Main CPU : Z80 (@ 3.072 Mhz)
Sound Chips : Tone generator and discrete circuits
Screen orientation : Vertical
Video resolution : 224 x 256 pixels
Screen refresh : 60.61 Hz
Palette colors : 98
Players : 2
Control : 2-way joystick
Buttons : 1

>>> TRIVIA
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Considered as a hack of 'Galaxian', this game seems more like a hack of 'Moon Alien' by Nichibutsu, but with the graphics changed to look more like 'Galaxian'. This explains why the shots move with the ship and why the fuel gauge is there. Galaxian also didn't use a 'title screen' formed with graphics, it went straight through to 'We are the Galaxians'. Also, the rate of fire is much faster and the alien's movements are more random.
Original releases :
Namco's Galaxian (October 1979)
Licensed releases :
Midway's Galaxian [Upright model] (December 1979)
Midway's Galaxian [Cocktail Table model] (December 1979)
Nichibutsu's Moon Alien [Upright model]
Nichibutsu's Moon Alien [Cocktail Table model]
Unofficial releases :
CGI's Galaxian Part 4
Galaxian Part X
Galaxian Turbo
Space Invaders Galactica
Zaccaria's Super Galaxians
Subelectro's Swarm
PETACO's Zero Time
- SCORING -
Light Blue Ship in formation : 30 points
Light Blue Ship attacking : 60 points
Purple Ship in formation : 40 points
Purple Ship attacking : 80 points
Red Ship in formation : 50 points
Red Ship attacking : 100 points
Flagship in formation : 60 points
Flagship attacking with no escorts : 150 points
Flagship attacking with 1 escort : 200 points
Flagship attacking with 2 escorts, flagship killed before BOTH escorts : 300 points
Flagship attacking with 2 escorts, flagship killed AFTER both escorts : 800 points

>>> OTHER GAME RESOURCES
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Game's rom.