The Ninja Gaiden: Master Collection due out in June includes 2007's Ninja Gaiden Sigma, 2009's Ninja Gaiden Sigma 2 and 2012's Ninja Gaiden 3: Razor's Edge – but it does not include Ninja Gaiden Black and Ninja Gaiden 2. Why?
According to Team Ninja, some of the code for those games was irretrievable.
In an interview with Famitsu (thanks, Siliconera), Team Ninja brand manager Fumihiko Yasuda explained:
