The Percussor (c) 1981 Orca.

>>> TECHNICAL DETAILS
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Main CPU : Z80 (@ 4 Mhz), Z80 (@ 1.78975 Mhz)
Sound Chips : AY8910 (@ 1.78975 Mhz)
Screen orientation : Vertical
Video resolution : 224 x 256 pixels
Screen refresh : 60.00 Hz
Palette colors : 49
Players : 2
Control : 8-way joystick
Buttons : 2

>>> OTHER GAME RESOURCES
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Game's rom.