release: 30 augustus 2012 (JP), 15 maart 2013 (EU)
dev: Compile Heart
Hyperdimension Neptunia 3.
The game takes place in an alternate world in the year 1989. The regions of Lowee, Leanbox, Lastation, and Planptune exist in this world as well. However, the countries' cultures differ from those in Gamindustri. For example, Lowee's towns and cities are said to be modeled after a Japanese style of architecture.
The player resumes the role of Neptune, as she is caught in a space/time rift, and is sent to another world in the year 1989. The Country of Lowee prepares for war with rumors that the country of Leanbox is planning to invade their borders by sea.