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.
MikuMikuDance
The software was released as freeware. The models of the Vocaloid mascot series provided with the software are subject to the PiaPro Character License, and are not allowed to be used without permission for commercial reasons. Although the software is distributed freely, models released independently of the software may not be — original produced models, motion data, and landscapes may be subject to their creator's own rules. The program does not standardly include all of the Vocaloid characters, but it includes Hatsune Miku, Kagamine Rin, Kagamine Len, Kaito, Meiko, and Megurine Luka; and although Yowane Haku and Akita Neru are not official Vocaloids, they became so popular that Crypton officially licensed and added them to .