Some concept art of the Tentacle shows it to be a cluster of three Tentacles attached to a bulbous base, which matches that encountered in the game.ДЄlthough Tentacles usually come in groups or clusters of three, single Tentacles are also encountered, and the number of Tentacles present may reflect the size or stage of development of the base, or else a more spread-out being, with Tentacles in various locales. The Tentacle's body encountered at the bottom of the chasm is somewhat squid shaped, with three stumps that appear to have been severed. Indeed in Half-Life, after the first Tentacle encounter, the player travels through the chasm the creature had occupied. Typically several Tentacles use the same pit, suggesting that they may be appendages of a larger organism. Despite this, however, they are incredibly resilient to regular weapons. Tentacles usually emanate from pits, into which they can retract when injured or in danger. This 'eye' appears to be a sensory organ, although the creature only reacts to sound and surface vibrations. The Gonome sprints, with his arms outstretched.The three Tentacles in the chapter Blast Pit.ДЄ large, green, segmented stalk supports a 'head', which ends in a sharply pointed, blade-like appendage and features what looks like an eye.

Unlike their standard zombie counterparts, Gonome's have 'visible' eye sockets and a 'visible' mouth.

The Hunter from Left 4 Dead, also published by Valve, uses a very slightly modified Gonome attack sound for one of his melee attacks.

It was reused for the scientist model under the name 'sohappy' in the original model, and 'hambone' in the Steam version, for a scientist seen dancing through a security camera at the start of Blue Shift.

The Gonome model has an unseen dancing animation named 'veryhappy' in the original model, while it is 'sohappy' in the Steam version.

As it is known that the Combine were experimenting on Headcrabs to create the Fast Headcrab and Poison Headcrab, it is possible that the Standard Headcrabs in Half-Life 2 have also been modified to prevent further mutations in the host body.

In Half-Life 2 no Gonomes are seen in Ravenholm, despite the fact that the Humans there were transformed into Zombies a fairly long time prior to the beginning of the game's events, evident by the fact that Father Grigori had clearly been setting up traps and living alone for a long time.

It could be assumed that Gonomes are critically mutated scientists since they're only depicted with plain white scientist pants as seen in the standard-definition models. It should also be noted that the Soldier zombies and Security Guard zombies were also created by Gearbox. Various new designs were made by Gearbox in plans for the Zombie models. In many ways, the Gonome's behavior is similar to that of a Bullsquid.ДЄccording to Black Mesa scientists, as Headcrabs can take over the host's nervous system, one of them asks Adrian Shephard ' Can you imagine what the next stage of mutation looks like?'Д«eing an expansion, Opposing Force briefly demonstrates the continued mutations of a Zombie. They can sprint if they spot a distant target.

Should the enemy get closer, they will resort to manually attacking with their claws.

If they observe any threat, they will first use their ranged attack. Gonomes generally stay with groups of lesser Zombies and Headcrabs. While the host body appears to grow dramatically, the Headcrab controlling the host appears to wither or deflate the outlines of the host skull's eye sockets and nose are visible through the Headcrab's skin. The Gonome also obtains the ability to spew organic projectiles from their maw. The host experiences a growth in overall body mass, and the gash in the chest cavity develops into a functional, vertical maw. While the precise reasons for the secondary mutation remains unknown, it appears that if a Standard Headcrab and their host survive for an unspecified period of time or are subjected to certain conditions, the Zombie will develop into a Gonome.

Half life 2 ichthyosaur