You're out to stop some cyborgs from world domination (I assume) across seven levels of bullet-riddled mayhem. The player mans one of three well-equipped helicopters (Apache, Hokum, and Comanche) and takes to the skies.
Zero Gunner II is one of the first serious attempts at genre innovation in some time. It, for all intents and purposes, functions like any other shooter, only you can rotate the helicopter 360 degrees to shoot from any direction. This is a significant step for the dying shooter genre, as the player is no longer limited to shooting from a pre-determined vantage point. Other than this, Zero Gunner II is not much different from Mars Matrix or Giga Wing 2... which is a good thing, mind you.