A Dungeon is a recurring location where the player can explore and run around with their character of their choice. They made their first appearance in the original Hyperdimension Neptunia and have been present in every title of the main series and remakes.
While traveling inside dungeons, the player will be granted the opportunity to explore areas with any character in their party. The player will be able to encounter and fight enemies for a variety of things (i.e. EXP, Credits, Items) while also being able to pick up treasure or materials lying around.
Proceeding through dungeons is often important for progressing the story due to many story events taking place within them.