kivi95 on 19 September 2012
Ninja Gaiden Sigma Plus 2 releasing for PSvita in early 2013.
http://www.thesixthaxis.com/2012/09/19/ninja-gaiden-sigma-plus-2-announced-for-ps-vita/
http://gamrconnect.vgchartz.com/thread.php?id=130023&page=1# Official Playstation Vita Thread! Come in and join!!!