Hyperdimension Neptunia mk2 is the sequel to Hyperdimension Neptunia, announced on April 12, 2011, for the PlayStation 3.
It was released on August 18, 2011 in Japan, and will be released in 2012 in the United States. The sequel contains brand new main characters, as well as returning characters, and the gameplay has been updated so as to remove the random encounter feature. New maps and a brand new world feature as well, and the cutscenes have been upgraded from the old 2D visual novel style cutscenes. The story focuses on the younger sisters of Neptune, Noire (Black Heart), and Blanc (White Heart) on a quest to save the goddesses after they are defeated and captured by Arfoire. The time period for the game is known as 20XX, which possibly not coincidentally, is the same time period name given to the Megaman series. The game is due to be released as a special edition with a Purple Heart figurine, a Purple Sister figurine, a soundtrack, and an art book. It is being co-produced by Idea Factory and Compile Heart, with assistance from Nippon Ichi Software, Gust Corporation, 5pb., and the recently founded company Comcept by Keiji Inafune. It is to be published in North America and Europe by NIS America in February 2012.