Andreas Asimakis writes, "When I look back on my years as a young gamer, the thought that I was playing a game that could have been considered violent never entered my innocent, pre-adolescent mind. Whether I was squashing Goombas, stabbing Octoroks or blasting Metools, it was all good times to me. But as gaming moved out of its simple sprite-based world, so too did its violence become much more apparent. Fallen enemies that would rapidly blink and vanish from the screen, now bled; their tortured screams providing the sadistic soundtrack of what was once a series of computerized bleeps. I was no longer putting pixels to rest, I was ending the lives of characters with a voice. While many of my childhood games would transition into an M-Rated catalog, none had become more unapologetically violent than Ninja Gaiden."