Tentacle

{{Article|hl1}}
{{Cleanup}}
{{Enemy Infobox
| image= FileTentacle.jpg|250px
| name= Tentacle
| affiliation= Xen
| type=
| health=N/A
| weapons=Beak (100 per Strike)
| entity= monster_tentacle
| designer=*Chuck Jones
*Doug Wood (script sequence)http//web.archive.org/web/19990220144204/http//www.sierrastudios.com/games/half-life/archives.html Half-Life News
}}
{{Quote|Hey! Hey, over here! Eat lead, you outer space octopus!|Security guard|Half-Life}}

'''Hypersuctor sensitiva''',http//web.archive.org/web/19990222010052/http//ogr.com/specials/monsters/tentacle.shtml Half-Life Monster of the Week Feature on OGR.com commonly known as the '''Tentacle''', is a large alien creature which responds violently to sound and vibrations. It is first seen in a rocket propulsion test chamber, but is also seen through the Half-Life (series)|series on Xen and in other areas of the Black Mesa Research Facility.

==Overview==
FileTentacle pit.jpg|The three Tentacles in the chapter ''Blast Pit''.|thumb|200px|left

A large, green, segmented stalk supports a "head", which ends in a sharply pointed, blade-like appendage and features what looks like an eye. This "eye" appears to be a sensory organ, although the creature only reacts to sound and surface vibrations. Tentacles usually emanate from pits, into which they can retract when injured or in danger. 

Typically several Tentacles use the same pit, suggesting that they may be appendages of a larger organism. Indeed in ''Half-Life'', after the first Tentacle encounter, the player travels through the chasm the creature had occupied. The Tentacle's body encountered at the bottom of the chasm is somewhat squid shaped, with three stumps that appear to have been severed. Some concept art of the Tentacle, shows it to be cluster of three Tentacles attached to a bulbous base, which matches that encountered in the game. 

Although 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. Reasons that could support this assumption are how the Scientist pulled from the control room, when first encountered in the silo, is pulled down into the pit and possibly eaten by the base. Another characteristic could be how it relies on hearing, as the base could be too large to fit through, and relies on keen hearing to pull prey down.

==Appearances==
Throughout the Half-Life universe|''Half-Life'' series, only ten Tentacles have been encountered, of which eight are found in ''Half-Life'' while the other two are found in the expansion game ''Half-Life Opposing Force|Opposing Force''.

===Half-Life===
In ''Half-Life'', the first encounter is in the chapter ''Half-Life storyline Pit|Blast Pit'' where the player encounters three tentacles in a Rocket Propulsion Silo of Sector D Administration|Sector D. These tentacles act as a sort of mini-boss. As Gordon's weapons do no damage, he has to risk himself through the Tentacle-filled Silo. As the tentacles rely on sound and vibration to locate their prey, Gordon can toss grenades to distract them temporarily. Gordon moves through the silo and reaches other areas that branch off the silo, so that he can switch on the Oxygen, Fuel and Power for the Rocket Engine. After that, he again must risk through the same Silo back to the Control Room and Activate the Rocket Engine's test fire. The intense heat of the engine kills the Tentacles and the player progresses further.

A Tentacle is later encountered in the chapter ''Half-Life storyline Tension|Surface Tension''. It is found living in a small sandy area in the canyon, emerged from a burrow under the sand. Health, ammo and other supplies closely surround its base, and Gordon must sneak up to a dangerous proximity of the Tentacle if the player chooses to retrieve them.

Later, a Tentacle is found in the chapter ''Interloper'', after the first teleportation in that chapter. In this appearance, the player can observe the tentacle in its natural habitat on Xen. It is found outside a cave where the player teleports in. In an area not far from there, three more Tentacles are present, with a circular rocky bridge formation surrounding them. This is Gordon's last encounter with the Tentacles and the player has to distract and sneak past them in order to progress.

===Half-Life Opposing Force===
In ''Half-Life Opposing Force'', only two Tentacles are encountered. It is in the chapter ''Half-Life Opposing Force storyline Reality|Vicarious Reality'' where the player finds them in an Unconstructed Observation Area. The player has to distract them to pass through.

==Behavior and skills==
In terms of behavior, Tentacles aggressively target prey in the immediate vicinity of their pits.  While searching for prey, they gently tap the surrounding area, but when even the quietest noise or vibration is detected, the Tentacles will furiously and repeatedly strike at the location where noise or vibration was detected.  When a Tentacle comes in contact with prey, it will attempt to pull it into the pit, presumably where it is consumed and digested. In the game, this behavior is witnessed firsthand by the player when a scientist is grabbed and taken, screaming, into the pit at the base of the Tentacles.

In the game, the Tentacles cannot be destroyed with the player's arsenal but shooting the stalk a few times will temporarily drive the creature into its burrow (except in Half-Life Source|Source version. Great care must be taken when moving near them, forcing the player either to silently crouch past the burrow or cause a distraction with explosives (preferably hand grenades, as this does not reveal the player's location with sound), allowing the player to sprint out of range. It is a good idea to use this tactic, as tentacles can kill the player with one or two strikes.

It should also be noted that in Blast pit, using the ladders creates noise and the tentacles can detect such sounds.

==Behind the scenes==
*Chuck Jones designed the Tentacle and the Silo D scene where the creature grabs the scientist and hauls him screaming from Silo D-01's control room. According to John Guthrie, no one at Valve was prepared for anything like this scene. When they saw the effect it had on gamers in sneak previews, they knew they had made the right decision to put animated sequences directly into the game rather than setting them apart in cut scenes.''Half-Life 2 Raising the Bar''

==Trivia==
*The code of the Tentacle's base is called "cycler," which is used to spawn props in GoldSrc.

*The tentacles of the Gene Worm are similar to the Xen Tentacle.

*It is unknown whether the tentacles are all singleminded organisms bound to the base or if they are simply appendages controlled by the base. It remains one of the game's most questioned mysteries.

*The Tentacles will reappear if the player uses the "noclip" cheat and goes back to the silo in the chapter ''Blast Pit,'' as if they were not killed. However, this may not happen in the Steam version.

*The Tentacles in the chapter ''Blast Pit'' are scripted to die. If the player uses cheats to spawn another Tentacle, the spawned one will not die. The only way to remove the Tentacle is to point the crosshair at the Tentacle and use the cheat "impulse 203."

*The Tentacles are unaffected with the console command "Ai_Disable" which only disable nearby NPCs.

*The "base" of the Tentacles is only seen once in Half-Life. This often ignites debates on if the base has to rely on water to survive.

*According to a Scientist, the Tentacles encountered during ''Blast Pit'' were growing out of the ground.

*It remains unknown how Tentacles have arrived to Earth.

==Audio==
FileTentacle 1.ogg|noicon Tentacle moan
FileTentacle 2.ogg|noicon Ditto
FileTentacle 3.ogg|noicon Death
==Gallery==
*{{YouTube|-GeQfqyRT-g|Pre-release Tentacle model}}
*{{YouTube|jr4QpHdn8DE|Pre-release Tentacle animation}}

FileTentacle concept.jpg|Concept art of the early tentacle.
FileTentacle silo concept.jpg|Concept art for the ''Half-Life'' chapter ''Blast Pit''.
FileGordon tentacles.jpg|Gordon Freeman wielding his crowbar in front of the Blast Pit Tentacles, while two security guards fall to their deaths in the background. 
FileTentacle render.jpg|Old high-res model render.
FileBigtent.jpg|The early Barney in the Tentacle pit.
FileBigtent2.jpg|Ditto, another version.
FileBigtent3.jpg|
FileBigtent4.jpg|
FileBigtent5.jpg|
FileBigtent6.jpg|
FileC1a4b_-1.png|Tentacle grabing scientist
FileC1a4i0001.jpg|Tentacle taking away a scientist in Silo D.
FileBarney Tentacles pwnd.jpg|Security guard about to get killed by the Tentacles in Silo D.
FileC1a4i0018Resized.png|Tentacle attacking Gordon.
FileC1a4g0001.jpg|The base of Silo D's Tentacle, underwater.
FileTentacle Xen1.jpg|The first Tentacle seen on Xen.
FileOverhaul_tentacle.jpg|Gordon attacking the Tentacle with the Hivehand
FileTentacle Xen2.jpg|Tentacles on Xen.
FileTentacle base model.jpg|Base model.


==List of appearances==
*''Half-Life'' {{1st}}
*''Half-Life Opposing Force''

==References==
{{Reflist}}
{{Xen}}
{{Creatures}}
CategoryXen creatures
CategoryBosses
CategoryHalf-Life
CategoryHalf-Life Opposing Force
CategoryEnemies
CategoryChuck Jones designs
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{{wikiaUser talkAngela}}

==Welcome==
I'm glad to see you stopped by, we're finally starting to get noticed! Several IPs have come by and helped out, but most work here is being done by me, although i do have a fair amount of support from my team (RR, Geoffron, Davereject). I'm hopeing i can get some users to register with Wikia for this wiki specifically by the end of June. I could really use some active members. However, this wiki is finally out of the rocks, but we still have yet to get it going. Please keep me up to date if you come across any problems or find anything wrong. Thanks for your support.
-- UserDonut THX 1138|'''Donut THX 1138''' ImageDonutsig.PNG|35px User talkDonut THX 1138 |Comm

Also, i just saw on your page that you speak German, as do i. I'm American, but my mom's/stepdad's family is from Germany, biological dad's family is from England (i'm an odd combo). Anyways, i thought that was interesting, where/when did you learn (if you don't mind me asking), collage? high school? out of school? I always find it interesting where and how people learn other languages.
-- UserDonut THX 1138|'''Donut THX 1138''' ImageDonutsig.PNG|35px User talkDonut THX 1138 |Comm

My ex-boyfriend was German so I lived in Berlin for nine months. I also learnt it a bit at school. UserAngela|Angela User talkAngela|talk 0222, 1 June 2007 (UTC)

==Welcome, again==
I Angela! Our wiki is getting better and better, hope you like it. ;-) UserKlow|Klow 2235, 18 May 2009 (UTC)