Invinco (c) 1979 Sega.
Another game in spired by 'Space Invaders', this one includes some innovation on the aliens : One row blinks in and out of view, another row's aliens roll so as to make themselves harder or easier to hit, and a 3rd row of aliens each take (at least) 3 hits to kill. A 4th row has aliens that turn into bombs, blowing up everything around them to make your job somewhat easier.

>>> TECHNICAL DETAILS
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Game ID : 310-318
Main CPU : Z80 (@ 1.93356 Mhz)
Sound Chips : Samples
Screen orientation : Vertical
Video resolution : 224 x 256 pixels
Screen refresh : 60.00 Hz
Palette colors : 64
Players : 2
Control : 2-way joystick
Buttons : 1

>>> TRIVIA
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Released during November 1979.
- SCORING -
Bottom Blue aliens : 100 points
White aliens : 200 points
Yellow aliens : 300 points
Light Blue Aliens : 400 ponts
Top Blue Aliens : 800 points
UFOs : 1,000 - 2,000 points

>>> TRICKS AND TIPS
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Time your shots when aiming at certain targets. The white aliens turn invisible on you, so try to hit them when they're visible on the screen. Also, there's a period of time that the top aliens are invulnerable to your shots while they change to another form; wait a second or so before shooting them again so you don't waste shots and time.

>>> OTHER GAME RESOURCES
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Game's rom.