A FREAK Chip is a device implanted into humans, turning them into artificial vampires. It then gives them powers similar to a vampire and in some cases, even more powerful skills than those that would be expected.
The Freak Chip was created by Millennium's Doctor and after years of hiding in Rio de Janeiro, Brazil they finally got the chips to work. The chips empower the user to become vampires, in that they will never be fatigued as they have high stamina. In some cases it can revert the aging process and give the user special talents or heighten talents they already have. The chip has been used to create the last battalion that stormed London and fought the last of the Iscariot Organization. It was also used at full power on Walter C. Dornez, reverting him back to a younger age and giving him the power to battle Alucard at a nearly equivalent level.