Vortigaunts are a semi-humanoid race with one head, two legs, two arms and a smaller third arm growing out of the torso. They have mottled, greenish-brown skin, a large red eye with several smaller eyes around it, breathing tubes on either side of the mouth and two-digit hands. Vortigaunt enslaved by the Nihilanth or Combine have metallic shackles on their arms, a collar around their necks and plates covering the crotch area. Free Vortigaunt have no apparel at all.