King Neptune's Adventure is an NES title with the aquatic theme suggested by the title. The game likely involves the player going on an underwater adventure, possibly encountering various marine creatures and environments. The genre is unclear from the name alone, though it is reasonable to expect the gameplay to be either a platforming adventure or a puzzle game.  Information about developers and publishers is limited based solely on this title.

King Neptune's Adventure (USA) (Unl)

Kind Gal's (Japan) (Unl)