Hell Knight

The Hell Knight is a monster introduced in Doom II. It is a weaker cousin of the Baron of Hell, with tan rather than pink skin, and different sounds when alerted or slain. Although it is much easier to kill, its attacks are just as potent as a baron's.

Being functionally equivalent to the Baron of Hell except for having only half as much health, the weaker Hell Knight serves better as a medium-strength monster, falling more quickly to small arms fire such as from the shotgun or chaingun, or offering some resistance without slowing the action down, against heavier weapons.

The Doom II manual describes the Hell Knight as follows: "Tough as a dump truck and nearly as big, these Goliaths are the worst things on two legs since Tyrannosaurus rex". In the manual for the original Doom, this was the description used for the Baron of Hell. The Official DOOM FAQ uses "Slightly easier to kill than our friend the Baron, but appear in larger numbers. " instead. The manual for the early versions of the PlayStation port refers to them as "Knights of Hell".

Doom RPG
In Doom RPG, the baron of hell and the hell knight both belong to the "baron" monster class. There are three variations, identified by color: As in the original, the hell knight is not as powerful as the baron, though both are more powerful than the new "ogre" variation. This class of monster is especially weak against attacks from shotguns.
 * Ogre (green torso, red hands, brown legs)
 * Hell knight (brown torso, brown hands, pink legs)
 * Baron (pink torso, orange hands, brown legs)

Trivia
Due to the Hell knight reusing code from the Baron of hell, Hell Knights and Barons cannot be injured by each other and thus cannot infight normally.