Liberation © 1984 Data East.
A vertically scrolling shoot'em up game.
Main CPU : DECO (@ 2 Mhz)
Sound CPU : MOS Technology M6502 (@ 1.5 Mhz)
Sound Chips : (2x) General Instrument AY8910 (@ 1.5 Mhz)
Players : 2
Control : 8-way joystick
Buttons : 2
Released in December 1984 in Japan.
This game is known in US as Dual Assault.
A bootleg of this game was produced under the same name in 1985 by Life System Seoul.