IGN: "Final Fantasy IV plays much like many traditional RPGs of the time. Gamers will control a party of up to five characters. By visiting a variety of locales, from castles and dungeons to towns and cities, you'll be able to progress through the primary story of Final Fantasy IV, while occasionally branching off to complete some random side quests and other peripheral tasks. Many locations are associated to an overarching world map that players will often travel over.
And combat in the game is triggered by random encounters. Once a random encounter has trapped your party, you'll have to fight through enemies using Final Fantasy IV's turn-based-but-not-quite system known as Active Time Battle. This system puts an impetus on actively paying attention to each fight, as opposed to a more straight forward turn-based affair ala the Dragon Quest series."