 On his way to the outer limits of Castle Rock fortress , Ryu encounters Foster , who was the head of the CIA 's Special Auxiliary Unit in the first Ninja Gaiden game , via a video image . After saying that nobody has ever made it through the fortress ' defenses alive , Ryu inquires about Irene , to which Foster replies : " I don 't know what you 're talking about . " Ryu vows to push on , Upon reaching the foundation of Castle Rock fortress , Ryu encounters his " original " , or a person designed to look like Ryu , and finds out that it was he who killed Irene . They both thrust themselves at each other , and afterwards look @-@ alike tells Ryu that he has gained all of his powers . The look @-@ alike flees , saying that Foster ordered him not to eliminate Ryu quite yet . 
