Air Duel (c) 1990 Irem.
A vertically scrolling shoot-em up game.

>>> TECHNICAL DETAILS
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Irem M-72 system hardware
Main CPU : V30 (@ 8 Mhz)
Sound CPU : Z80 (@ 3.579545 Mhz)
Sound Chips : YM2151 (@ 3.579545 Mhz), DAC (@ 3.579545 Mhz)
Screen orientation : Vertical
Video resolution : 256 x 384 pixels
Screen refresh : 55.00 Hz
Palette colors : 512
Players : 2
Control : 8-way joystick
Buttons : 2
=> [A] Gun, [B] Guided bomb

>>> TRIVIA
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Released in June 1990.
Severals musics from this game was recycled for others games from the same musicians :
The mission 1 music was recycled and remixed in 'Gun Force II' (Stage 2 part 1).
The mission 2 music contains a synth solo (after 32 seconds) which was performed with a sax in 'Metal Slug 2 - Super Vehicle-001/II' (mission 3).
The mission 3 music was recycled and remixed with electric guitar in 'Metal Slug 3' (mission 1, underwater way).
The mission 3 music was also recycled and remixed in 'Gun Force II' (Stage 2 part 2).
The mission 4 music was recycled and remixed in 'Gun Force II' (stage 1).

>>> GAME SERIES
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1. Air Duel (1990)
2. Air Assault (1993)

>>> OTHER GAME RESOURCES
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Game's rom.