HAL 21 (c) 1985 SNK.
A vertically scrolling shoot 'em up from SNK.

>>> TECHNICAL DETAILS
---------------------
Main CPU : (2x) Z80 (@ 4 Mhz)
Sound CPU : Z80 (@ 4 Mhz)
Sound Chips : (2x) AY8910 (@ 1.5 Mhz)
Screen orientation : Vertical
Video resolution : 216 x 288 pixels
Screen refresh : 60.00 Hz
Palette Colors : 1024
Players : 2
Control : 8-way joystick
Buttons : 2

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