The Vampire Piggy Hunter is the metafictional main character in the Game Slave, and Game Slave 2 handheld gaming aystems. Gaz is consistently seen playing it, and apparently she is not the only one. As seen in the episode Game Slave 2, there was a large crowd of people who were addicted to this game and its franchise.
The Vampire Piggy Hunter's enemies include the whole race of Vampire Pigs, and judging by the mention of a "zombie hog" boss at one point in the game, it appears that all his enemies are pig-related.
The Vampire Piggy Hunter has only one eye, no nose, and wears a cloak and a wide-brimmed hat. Whenever he attacks, flames appear from nowhere and surround him. He has a sword that shoots purple-white lasers and can block fireballs with it. He also seems to bear a vague resemblance to an Irken, though this may simply be on account of stylization.