Originally known as Oboro Muramasa in Japan, Muramasa: The Demon Blade is a 2-D side-scroller Hack 'n Slash, Role-Playing game for the Nintendo Wii. It was released on the 9th of September 2009 in the US and the 27th of November 2009 in Europe.
Set in the Genroku Era in Japan, the game follows the story of two different protagonists - Kisuke, a fugitive ninja who has lost his memory, and Momohime, a princess who has been possessed by a dark spirit.
Muramasa: The Demon Blade was later ported to the PlayStation Vita under the name Muramasa Rebirth. It was released on March 28, 2013 in Japan, June 25, 2013 in North America, and October 16, 2013 in Europe. In addition to a completely re-translated script, four new playable characters are planned to be released as downloadable content, each of whom have their own unique fighting style and short story.