This is the button configuration of original Arcade machines of GRADIUS IV. This is also the same as the previous chapters.
Button A, the Power Up button, is used to activate a highlighted item in the Power Up Gauge(the bar that appear in the lowermost of the screen).
Button B, the Shot button, is for the shoot of main weapons(normal shot, Double, Tail Gun, Laser, Ripple Laser etc.). This button requires rapid fire in most cases, except when equipped with Laser or Armor Piercing.
Button C, the Missile button, is used for the shoot of all kinds of Missile. This button can be pressed and hold down(do not require rapid fire) in most situation, except when equipped with Flying Torpedo.
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