I'm not surprised that a Snake versus Batman argument causes some disagreement. As Snake is the Grand Daddy Sensei of all Black Ops guys. However I could so see Batman sensing the Spy as he is obsessive on how a person sounds when he walks or minor details like that. He always finds the invisible or shape changed enemy in Justice League. Hope poor Robin isn't laying in the ditch with a knife wound in the back though, or it will really get ugly. Snake is from solid snake Altair is from Assassins Creed The Spy is from Team Fortress
Snake is from solid snake
Altair is from Assassins Creed
The Spy is from Team Fortress