This page lists various references/cameos of Neptunia characters or settings in other games.
- Nisa appears a DLC character in Disgaea 4 and Disgaea D2.
- Neptune, Noire, Blanc, Vert, and Nepgear are DLC costumes in both Mugen Souls and Mugen Souls Z.
- The creators of the Naruto Storm series, CyberConnect 2, has stated that if given enough fan feedback they will add a single character from the Hyperdimension Neptunia franchise, regardless of which game their from into their newest entry, Naruto Storm Revolution. They stated that fans need to state which character they want and the one with the most requests will be added (that is if enough fans say anything at all of course).
- Akiba's Trip: Undead & Undressed has DLC content of Purple Heart, in the form of a male's T-shirt featuring Purple Heart in it and a Dakimakura (a hugging pillow) of her as an equippable weapon.
- Neptune, Noire, Vert, Blanc and Uzume from Hyperdimension Neptunia Victory II will make a cameo appearance in the upcoming RPG Destroyer Trillion and will become available as free downloadable content.