- Not to be confused with Hyperdimension Neptunia.
The Hyper Dimension (超次元, Chō Jigen) is a dimension of the Hyperdimension Neptunia series and appears in every title of the main series since Hyperdimension Neptunia mk2.
Hyperdimension Neptunia mk2
Gamindustri is one large continent with the exception of Leanbox, which is a landmass south and separated from the main landmass by a body of water.
Gamindustri's nations, Planeptune, Lastation, Lowee, and Leanbox are still ruled by its respective CPUs: Neptune, Noire, Blanc, and Vert. However, the goddesses now have younger siblings known as CPU Candidates. Nepgear, the younger sister of Neptune, Uni, the younger sister of Noire, and Rom and Ram, the younger twin sisters of Blanc, stand as CPU Candidates of their respective nations. The only one without a younger sibling is Vert, meaning that Leanbox doesn't have its own CPUs.
Each nation has its own Oracle, acting as the head advisor for the nation's CPU. With the exception of Histoire, who now serves as the Oracle of Planeptune, Kei Jinguji, the Oracle of Lastation, Mina Nishizawa, the Oracle of Lowee, and Chika Hakozaki, the Oracle of Leanbox, make their first appearance in this dimension and Hyperdimension Neptunia mk2.
Celestia appears to be non-existent, and the CPUs live in their land's Basilicom. Both CPUs and CPU Candidates in this world influence Gamindustri's shares in this world by the bettering of their own nations or performing quests given out from The Guild. The Guild serves as the quest giver in Hyperdimension Neptunia mk2, but its origins and history is left unknown or is the same as Hyperdimension Neptunia's Guild.
The Arfoire in this dimension is no longer the same Arfoire from the Super Dimension. She is instead known as the Deity of Sin whose prime objective is to simply destroy the world and its goddesses. A group known as The Arfoire Syndicate of International Crime worships her and attempt to spread her influence around the world in an attempt to steal shares from the CPUs.
At the center of Gamindustri lies a region called the Gamindustri Graveyard. This grim place is where those time has passed rest for eternity, including forgotten goddesses and makers.
Hyperdimension Neptunia Victory
The Hyper Dimension in Hyperdimension Neptunia Victory and its remake retains the same origins and history from Hyperdimension Neptunia mk2. It makes a brief appearance before Neptune is sucked into the Ultra Dimension, and its set story timeline is years after the events in Hyperdimension Neptunia mk2. The year is revealed to be 2012 during the timeline.
The time span between the Hyper Dimension and Ultra Dimension is different. One year in the Ultra Dimension is equivalent to one day in the Hyper Dimension. However, by the end of the game, both worlds have the same flow of time due to the portal staying open.
Megadimension Neptunia VII
The Hyper Dimension reprises yet again, set 3 years after the events of Victory. It is one of the dimensions featured in Megadimension Neptunia VII, along with the Zero Dimension and the Heart Dimension.