Hatsune Miku
A series of rhythm games starting from "" were produced by Sega under license using Hatsune Miku and other Crypton Vocaloids, as well as "fan-made" Vocaloids like Akita Neru. TinierMe also made attire that looks like Miku's for their services, allowing users to make their avatar resemble her. The series has sold 6million copies. "" was developed for the Nintendo 3DS. Miku's appearance in this game is based on the Nendoroid series of figures. Hatsune Miku is also briefly referenced in the game "Recettear", where a young man stargazing sees "The Green-Onion Girl" constellation. Also, in 2013, Saki Fujita voices Fei-Yen HD, a character based on one of Hatsune Miku's modules, in "Super Robot Wars UX"; this appearance does not use Miku's vocal library.
Hatsune Miku
It was mentioned that a 7th "Append" voicebank, a falsetto voice, had been recorded; however, since the developers didn't think it would be useful on its own, no plans were made for an independent release. During the Kagamine Append development, a "darkish Whisper/Sweet" append was being considered. Miku's English vocal was also due for a Vocaloid 2 release, but it was not released in the engine due to low quality.