if he can't remember anything, not even his name, then how does he know someone asked him a question once?
Because writers are stupid and haven't realized video games were better when their stories were a small paragraph before the title splash screen.
"In the year 20XX, a man with supernatural powers has lost his identity. In his quest to find it, he gains a thirst for ruthlessly murdering innocent people. His fate, and the fate of thousands lie in your hands."
PROTOTYPE