Hyperdimension Neptunia Wiki

Superdimension Neptune VS Sega Hard Girls (超次元大戦 ネプテューヌVSセガハードガールズ 夢の合体スペシャル, Cho Jigen Taisen Neptune VS Sega Hard Girls: Yume no Gattai Special, lit. Super Dimension War Neptune VS Sega Hard Girls: Dream Combination Special) is a crossover game between the Hyperdimension Neptunia and Sega Hard Girls franchises developed by Felistella for the Playstation Vita. IF and new character Hatsumi Sega are the co-protagonists of this game.

Sega Hard Girls is a similar franchise that also turns Sega consoles into moe characters. It is a Japanese multimedia project which was adapted as a light novel and into the anime Hi☆sCoool! SeHa Girls.


"A grand library that administers all of the world’s history.

They say that the history books in this library have the power to actually rewrite the history of the world.

After a long journey, IF steps foot into the grand library with a certain objective in mind.

However, at the same time, something happens in the library that has been making the history books disappear left and right.

The books’ disappearance means the actual loss of history. As history disappears before her own eyes… so does the world.

In order to correct these wrongs, IF begins her adventure on a journey that goes beyond space-time."


Main Article: Superdimension Neptune VS Sega Hard Girls/Gameplay

The player is able to explore dungeons including being able to crawl through spaces.


The adventure takes place across four different eras: the classical-themed Mega Drive Era, the medieval-themed Sega Saturn Era, the industrial-themed Game Gear Era, and finally the modern Dreamcast Era. The Grand Library serves as the game's hub and serves many functions such as travelling between eras, shops, quests, and class changing.


Superdimension Neptune

Voiced by: Kana Ueda (Japanese), Kate Higgins (English)
One of the co-protagonists. In a world that is seeing an era of extinction, she’s an adventurer who journeys around the world with her bike to find something fun and for a brighter tomorrow. She’s a serious, cool, and steady character, one who keeps the group together, but she can be a bit of a “chūnibyō” (one with some delusional thoughts of having special powers that no other person has, or act like know-it-all adults and look down on others.)
Neptune (Nepbike)
Voiced by: Rie Tanaka (Japanese), Melissa Fahn (English)
The Main Character of the Hyperdimension Neptunia Series. When history was erasing, Neptune saved IF and Segami at the cost of her own life, but she ended up possessing IF's bike.
Voiced by: Rie Tanaka (Japanese), Melissa Fahn (English)
The other Neptune from a parallel timeline. When IF and Segami went back to her era again, Neptune is saved by them instead and joins their party afterwards along with Sega Saturn.
Voiced by: Yui Horie (Japanese), Christine Marie Cabanos (English)
Neptune's younger sister.
Voiced by: Kana Hanazawa (Japanese), Cherami Leigh (English)
Neptune's predecessor.
Uzume Tennouboshi
Voiced by: Mariko Honda (Japanese), Erica Lindbeck (English)
Neptune's successor.
Voiced by: Mika Kanai (Japanese), Stephanie Sheh (English)

Sega Hard Girls

Hatsumi Sega
Voiced by: Emi Nitta (Japanese), Cassandra Lee Morris (English)
One of the co-protagonists. An unknown young girl with amnesia. She goes by “Segami” or “Segamin.” She doesn’t remember anything other than her name, but she seems to show an unordinary tenacity for changing the history of the war between the Goddesses and the Sega Hardware Girls. She has a leader-like charismatic personality, and she doesn’t listen to others at times, but she occasionally comes up with ideas from out of nowhere that even baffle her own friends.
Voiced by: Mao Ichimichi (Japanese), Mela Lee (English)
A girl with an honest personality and a strong sense of justice. She values the connections people have with one another and can become friends with anyone. People poke fun at her a lot, and her expressions are always changing. She wears her heart on her sleeve for everyone to see. Not incredibly self-aware, her ditzy personality has become such a part of her persona, that people often feel sympathy towards her.
Sega Saturn
Voiced by: Minami Takahashi (Japanese), Lauren Landa (English)
Constantly sarcastic and aloof, but if someone is trying to be funny, she can't help but chime in. She is a girl trying to act tough. When she gets complimented, she's embarrassed to the point of anger. When push comes to shove, she gets rather weak, as well.
Mega Drive
Voiced by: Shiori Izawa (Japanese), Faye Mata (English)
She's an intellectual who is respected because of her deep knowledge and aptitude for accurate analyzation. She gets too argumentative at times and fails. She hates to lose and, often times, she is taunted and encouraged by others to make weird inventions. She's firm and stoic, but deep down she aspires to be more girly.
Game Gear
Voiced by: Minami Tanaka (Japanese)
She's an introvert who tires quite easily. Not much for words, she often moves at her own steady, slower pace. She enjoys talking negatively and is bad at making friends. She doesn't feel entirely comfortable around too much liveliness, but she doesn't hate it. She likes to watch from afar.


The Mini Soundtrack CD was offered as a pre-order bonus for the Japanese release, while the Limited Edition of the English release included the Official Soundtrack.



Superdimension Neptune VS Sega Hard Girls Gameplay


  • This is the first game in the franchise not to have a CPU or CPU Candidate as the lead role.
  • Many, if not all, of the Sega Hard Girls, who aren't part of the main cast make an appearance as Chirper Characters with many of them having interactions with IF herself as well as running some of the menu options in the library.
  • The plot seems to slightly resemble that of Dragon Ball Xenoverse, as a character has to go through history and stop it from being changed.
  • All characters in this game are based on Sega consoles, with each having their counterpart, i.e., Game Gear and Nepgear, with the exception of IF and Histoire. Segami herself represents Sega as a whole.
  • Similar like DLC Characters and certain unlockable characters, all playable characters, aside from IF and Segami, are playable even if they have not joined the party in the story yet.
    • This is explained in-game as clones built by Histoire using the data IF and Segami got by meeting with the CPU or Sega Hard Girl. Although, it is explained as their only function is for combat and will not be able to converse normally aside from battle quotes. The clones disappear once the real ones join the party and their stats and levels will carry over.
  • The characters do not share the same backstories with each other. In this game, IF meets every CPU and Histoire for the first time, and the CPUs from Planeptune live in different eras instead of different dimensions. The SeHa Girls also live in different eras instead of the same era as in the Hi☆sCoool! SeHa Girls anime.
  • The prologue video of this game shows a duel between Purple Heart and Dreamcast, despite not being their respective counterparts. This is likely because both of them are the protagonists of their respective franchises of origin.
  • This game won the Hardcore Gamer "Best of E3 2016" award on the PS Vita category.
  • The localized terms CPU and HDD are never mentioned outside the tutorials and character profiles.
  • The European version of the game has Dreamcast wearing a blue outfit instead of her regular orange one, since Dreamcast has a blue logo in the PAL territories.
  • The existence of a PC version was accidentally leaked when ESRB rated the game and listed "Windows PC" in the list of platforms for the game.
  • This game is the final game in the entire series to be released on the PlayStation Vita.

External links


Superdimension Neptune VS Sega Hard Girls