Hyperdimension Neptunia Re;Birth2: Sisters Generation is the remake of the game for the PlayStation Vita developed by Felistella, which features a new selection of playable characters. Akin to the earlier remake game for the PS Vita, Hyperdimension Neptunia Re;Birth 1, this game also utilises the battle system from Hyperdimension Neptunia Victory in addition to a "remake system" which unlocks special modifications to the game. The remake features an improved framerate compared to the performance of the original mk2 PS3 game, in addition to reworked voice acting, music and visuals. In addition to most of the original mk2 cast, the game also features the characters representing game developer companies from Hyperdimension Neptunia Victory, in addition to Cave, 5pb, Red, and the four Oracles of each continent; both Gust and Nisa have been removed from the game, however. The opening theme song is "Kirihirake! Roleplay Star Girl" (きりひらけ！ロープレ☆スターガール) by Nao, and the ending song is "Never give up" by Ayane. Unlike the original, the ESRB rated the game with Teen.
Source: Wikipedia, "[en.wikipedia.org/wiki/Hyperdimension_Neptunia_Mk2 Hyperdimension Neptunia Mk2]", available under the CC-BY-SA License.