Ixion (c) 1983 Sega.
Collect all the letters to spell the word IXION. Shoot enemies and avoid being shot yourself.

>>> TECHNICAL DETAILS
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Main CPU : Z80 (@ 3.04125 Mhz), I8035 (@ 400 Khz)
Sound Chips : Custom (@ 400 Khz)
Screen orientation : Vertical
Video resolution : 224 x 256 pixels
Screen refresh : 60.00 Hz
Palette colors : 256
Players : 2
Control : Dial
Buttons : 1

>>> TRIVIA
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Released in January 1983.

>>> GAME PORTS TO OTHER SYSTEMS
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* Consoles :
Atari 2600 (1984) : Unreleased prototype

>>> OTHER GAME RESOURCES
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Game's rom.