Elfen Lied or Hellsing Ultimate from the ones I've seen. There is another series I heard about called Shigurui, though, and its gore are supposed to be vomit-inducing.
Elfen Lied or Hellsing Ultimate from the ones I've seen. There is another series I heard about called Shigurui, though, and its gore are supposed to be vomit-inducing.