Houndeye

"Did you see that thing, with the... the missing leg?"

- Security guard

The Houndeye is a tripedal creature appearing in the Black Mesa Research Facility during the Black Mesa Incident.

Overview
Possessing only three legs and a thorax, the Houndeye is a faint yellow-green in color, with electric blue tiger-like stripes adorning is spine. In place of a head there is a large, black, multifaced insect-like eye protected by eyelids. Houndeyes apparently communicate through a series of high-pitched sounds somewhat similar to the barking of dogs, on which its behavior and movement are also partially based, hence its name. Like most of the creatures found on Xen, Houndeyes are studied in Black Mesa's Sector E.

Behavior and skills
The Houndeye is an excellent example of a social animal in terms of pack hunting. While a shy and timid creature by itself, groups of three or more display resonant behavior, emitting destructive harmonic sonic attacks in shock waves, capable of injuring those they attack, appearing as violet, sometimes white circles around the creature. The eyelids are seen moving only when they are excited.

Although they are not seen displaying this trait often, Houndeyes appear to be carnivorous creatures, as one is seen eating a dead security guard in Half-Life: Blue Shift. The Houndeye's mouth is located on the underside of its belly, close to the eye, filled with what appears to be fang-like incisors.

Behind the scenes
The Houndeye was originally nicknamed "Roundeye".


 * It is one of the few creatures from the series that went virtually unchanged from the first sketch.


 * According to Ted Backman, designer of the Houndeye, its anatomy was inspired by a huge three-legged tabby cat named Tripod that lived in his neighborhood as a child.


 * The Houndeye was originally to use digestive fluid and its claws as attacks, while it only use its sonic attacks in the final version.


 * The Houndeye sonic attacks were originally to stun the player to allow the other members of the pack to attack with their claws, while sonic attacks only take a few health points in the final version.


 * Houndeyes were originally to be lead by a pack leader that would have stood on is rear leg to look around. The animation, "leaderlook", is still present in the model and can be seen in pre-release screenshots for Half-Life.


 * Its eye was originally to feature prismatic coloring, possibly cut for difficulties in implementation at the time of Half-Life's release. However it was apparently made for the cut Half-Life 2 model.


 * A proposed color was a green grey color, eventually replaced by a yellow.


 * The markings were designed to break up its silhouette.

Half-Life 2

 * The Houndeye was originally to appear in Half-Life 2. It was to be much thinner.


 * Like the Bullsquid, also cut from Half-Life 2, it was to appear in the Canals. A couple of Houndeyes can be found in the WC mappack map " ", last edited December 2002.


 * Houndeyes were also to be seen in a slideshow revealing the events between Half-Life and Half-Life 2 to be shown to Gordon at Eli's lab. In one of the images, Houndeyes were to be seen roaming in packs in suburban areas.


 * The Houndeye model featured in the playable Half-Life 2 Beta files is broken and cannot be viewed nor used. Only the image preview gives insight of his appearance.

List of appearances

 * Half-Life: Day One
 * Half-Life
 * Half-Life: Uplink
 * Half-Life: Opposing Force
 * Half-Life: Blue Shift
 * Half-Life: Decay
 * Half-Life 2: Raising the Bar