PERSONA 3: FES features not one but two complete games.
Persona 3 in its entirety is present but enhanced with new quests, difficulty levels, and Personas. The main story follows an untitled boy who takes on the Shadows during a moment of time known as the Dark Hour. The Dark Hour comes but once a day, so during the other times your character must endure the daily ritual of a high school student, including down time where social interaction with fellow characters is not only encouraged, but rewarded with stronger attacks. The additional story takes place after the first is completed, but can be played at any time. In this adventure you assume the role of a character from the first who gains the ability to wield multiple Personas. This time around however, the game is almost purely a dungeon exploration game and much less emphasis is put on character interactions.
Even though the game features a party-based combat system, you only have control over the main character in each game, and the artificial intelligence takes over for the other party members. Different styles of play can be set for the party to offer support or all-out attacks. Enemy encounters are not random -- you can see each potential battle on the map before engaging the enemy, giving your character a strategic advantage and the opportunity to strike first. As with most RPGs, fighting increases your level, which leads to better weaponry and Personas to control.