The Imp in Doom 3 is humanoid in shape, has grey skin with bony scales on its arms and 10 small eyes, Compared to its original version, and like many of the game's other demons, they have a more "alien-like" appearance. Unlike the "serpentine hisses" produced by their classic counterparts, this new version emits a high-pitched screech. These monsters are tall and aggressive, and stand at approximately the same height as a normal human.