|The contents of this article have been cut.|
The subject matter of this article contains in-development information that was cut from the final version of an official and/or canonical source and appears in no other canonical source. It may also contain incomplete information since not all cut material is publicly known.
Twice the height of an average person, it was to have a massive brain filling its entire body, with four eyestalks spaced evenly around it. An early version was to walk on three chitinous legs with a clicking sound; a later version, called Sactildiae Nefariousium, traded the rear leg for a thick, worm-like "tail". Its psionic attacks and psionic defenses would have made it immune to missile weapons.
It was to be found at least on Xen, in some caves. Additionally, as stated by Marc Laidlaw, the Kingpin appeared in several concept art pieces of the Topside Motorpool area. It was to break free from a squad of soldiers tormenting it, and destroy them with the player's help.
 In modding
 List of appearances
- Half-Life (First appearance) (Game files only) (Non-canonical appearance)
- Half-Life 2: Raising the Bar (Non-canonical appearance)