As we enter year five of waiting for the next mainline Neptunia game (that isn’t a remake), the spin-offs continue to release like clockwork. For the latest entry, Neptunia x Senran Kagura: Ninja Wars, Idea Factory once again tapped the shoulder of Tamsoft to collaborate with Compile Heart on another Neptunia spin-off. Tamsoft has already developed three other spin-off Neptunia titles: Hyperdimension Neptunia Action Unleashed, Blanc + Neptune vs Zombies, and Cyberdimension Neptunia: 4 Goddesses Online. However, this time it would be for a crossover with another series developed by Tamsoft.
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Tamsoft is primarily known for their big-breasted-ninja action game series: Senran Kagura. Neptunia has represented Senran Kagura in the past in the form of cameos from the Senran Kagura protagonist Asuka, and a Neptunia character, MarvelousAQL – who shares many traits of Asuka as well as her Japanese voice actor. This crossover seems like a natural fit, given the history of Compile Heart and Tamsoft on the Neptunia series already, and I wanted to see how they would pull it off.
In Gamninjustri, there are multiple countries that train ninjas in different fighting styles. The two biggest countries are Heartland which practices the Compa Style, and Marveland whose ninjas are practitioners of the Honeypa Style. The two nations are rivals, and their ninjas are often fighting one another. During one such encounter their fight is interrupted by the Steeme Legion, an unknown school led by the belligerent Yoh Gamer. Alongside her manager Tetsuko, Yoh Gamer announces that she is starting a great war to determine whose ninja school is the best in the land.