The Dragon Ninja returns with enough suffixes even Capcom would blush.
Like a photocopy of a photocopy, Ninja Gaiden Sigma 2 Plus reproduces the content of its original source but degrades the quality. The source is Ninja Gaiden II: Team Ninja's hack-and-slash action adventure game released for Xbox 360 in 2008. A port would be released for PlayStation 3 in 2009 (hence the Sigma) and again for PlayStation Vita in 2013 (hence the Plus). What we’re left with is that third clone from Multiplicity.