Metal Arcade: Jason Bakker writes:
Ninja Gaiden Sigma 2 Plus is the most content-complete version of the game, for what it's worth.
Team Ninja's Ninja Gaiden Sigma 2 Plus is a bit of an amalgamation of ports. First came Ninja Gaiden II (Xbox 360) in 2008. Then, something that then-series producer Tomonobu Itagaki claimed would never happen, happened. The game was ported to PlayStation 3 in the form of Ninja Gaiden Sigma 2, which apparently made Itagaki want to commit seppuku, and he left the company. I purchased and played through Ninja Gaiden Sigma 2 when it released in 2009 on PS3, and it really felt like a more complete version of the game, despite a questionable decision to remove all the gore. Now we have a port of that port, Ninja Gaiden Sigma 2 Plus - exclusive to PlayStation Vita - taking what was essentially an enhanced director's cut of NG2 and re-integrating the dismemberment and blood.