Gamindustri is the world where the majority of Hyperdimension Neptunia, Hyperdimension Neptunia mk2 and Hyperdimension Neptunia Victory take place. It is also referred to in the series as "The World Below" meaning the world beneath that of Celestia, where the four CPUs or goddesses reside. Gamindustri is composed of four landmasses: Planeptune, Lastation, Lowee, and Leanbox. Each of these landmasses are ruled by a separate goddess. The people who live on these landmasses worship a certain goddess, who in return gives the people of that landmass their divine protection.
- It is assumed that in Hyperdimension Neptunia Mk2, Gamindustri has an estimated population of 493,824 (based on the number of votes in Neptune's chirper events).
- In Hyperdimension Neptunia, the four landmasses are floating and one can only go to each land by Terraportation. However, in Hyperdimension Neptunia mk2 the landmasses have been drastically changed as Gamindustri is a large continent containing Planeptune, Lastation and Lowee and Leanbox being separated below.