The Queen is a red and black spider-like creature included in the SDK. It is fully animated, but does not make an appearance in the initial release campaign, Jacob's Rest. It has five health bars and can lock players into place while dealing damage to them with tentacles that come out of the ground. It can also enter a "crouched" position to fire a volley of 3 acid shots. It is a boss-type enemy that would have appeared in the unused SynTek Labs map.
- A marine can escape from her tentacles by using their melee attack.
- Some parts of her body are curiously similar to the Alien Queen from the movie Aliens.
- The Queen was intentionally supposed to be known as the "Behemoth", with a large sac (as labelled in the alpha concept) giving off a more obvious Alien Queen look.