{{Article|hl1|good}}
{{Enemy Infobox
| image= FilePit Worm model.jpg|250px
| name= Pit Worm
| affiliation=Race X
| type= Wildlife
| health=
| weapons=*Front claws
*Energy beam from eye
| entity= monster_pitworm_up
| designer=*Brian Martelhttp//bluesnews.com/cgi-bin/finger.pl?id=305&time=19990907022620 .plan file of Brian Martel on Blue's News (September 7, 1999)
*Stephen Bahlhttp//web.archive.org/web/20020809101006/http//www.gearboxsoftware.com/stephenb.html Stephen Bahl's Profile on the official Gearbox Software website (archived)http//www.valvetime.net/threads/marc-laidlaw-vault.114535/page-5 Stephen Bahl as quoted on ''Marc Laidlaw Vault'' on the ValveTime.net Forums
}}
{{Quote|X-Ray Zulu, are you there? We need backup in the waste sector! Some sort of worm creature! Tower and Inney are down and I've lost contact with the rest of the squad! We need backup now! Now, dammit, now!|HECU Marine|Half-Life Opposing Force|FileOf4a3 rd01.ogg}}
The '''Pit Worm''' is a Race X creature found in the Waste Processing Area 3 of Black Mesa Research Facility|Black Mesa during ''Half-Life Opposing Force|Opposing Force''’s eighth chapter, ''Pit Worm's Nest'', as the game's first boss.
==Overview==
The Pit Worm's caterpillar-like segmented body supports a head dominated by a single large eye with two vertical eyelids, and a twelve teeth mouth under it. It is found in the Waste Processing Area 3's Toxic Disposal Basin, a large room partially flooded with water, where the creature came from the ground (like an earthworm, hence its name). Its body is likely longer than seen, although it is unknown how much.
==Behavior and skills==
The Pit Worm's eye is its primary weapon, capable of firing a searing energy beam at nearby enemies. If enemies get too close, the worm also has large claws to strike out with. If it is shot in the eye, it will recoil, shielding it with its claws for a few seconds before striking aggressively at the player. The Pit Worm makes bird-like vocalizations. Like the Gene Worm, only one individual of that species is ever seen in-game.
If one manages to run into one of the many passages leading into other rooms, the Pit Worm will screech angrily and swipe viciously at the entrance of the passage taken.
==Appearances==
In ''Opposing Force'''s seventh chapter, ''Vicarious Reality'', Shephard picks up a radio transmission from a group of HECU Marines fighting the Pit Worm. In the next chapter, ''Pit Worm's Nest'', Shephard reaches the Waste Processing Area 3 and finds all the soldiers dead (although many were likely killed by Pit Drones infesting the area), and the Pit Worm standing in the Toxic Disposal Basin. As traditional weapons only upset the creature without killing it, Shephard must use toxic waste to defeat it. To do so, he must activate the steam vent (located near the creature), the main pressure valve (also located near the creature, and to be accessed thanks to the hand-held Barnacle and Spore Launcher spores on the wall, since the ladder to access the valve is broken) and the primary pump gearbox (located in Waste Station 02, another area, and by using an emergency override button) to unlock the toxic waste arrival, then release the toxic waste with the waste flush button, flooding the room with toxic waste and killing the creature. After that, Shephard merely has to activate the bridge previously blocked by the Pit Worm, and cross the Toxic Disposal Basin room to proceed further, in sewers leading to ruined hangars in Sector G.
==Behind the scenes==
*The Pit Worm obstacle is similar - albeit less challenging - to the Tentacle puzzle in the ''Half-Life'' chapter ''Blast Pit'', in that the player cannot simply use his weapons to defeat the creature, but must use the surrounding environment.
*The valve and the gearbox to be activated are obvious references to Valve Corporation|Valve Software and Gearbox Software, left there as Easter eggs. The reference to WikipediaSteam (software)|Steam is likely a coincidence, as it did not exist back then.
*Another Easter egg are the nearby garbage compactors, especially the flooded one, which are directly designed after the Death Star's wcstarwarsGarbage Compactor 3263827|garbage compactor seen in the film ''wcstarwarsStar Wars Episode IV A New Hope|Star Wars Episode IV A New Hope''.
*The Pit Worm's screams appear to be based on WikipediaVulture|vulture sounds, while its other idle sound resembles certain http//youtu.be/J6NuhlibHsM?t=30s vocalizations produced by red foxes.
==Gallery==
FilePit worm rising.jpg|The Pit Worm in the Toxic Disposal Basin.
FileSteam vent.jpg|The steam vent lever.
FilePressure valve.jpg|The pressure valve.
FileSteam pit worm.jpg|The steam is released.
FilePit worm laser.jpg|The Pit Worm firing its eye laser.
FilePit worm base.jpg|Bottom of the basin, showing that the Pit Worm came from the ground.
FilePit Worm's Nest4.jpg|The Pit Worm standing lower in the basin.
FilePit Worm's Nest2.jpg|Near the primary pump gearbox.
FileGearbox emergency override.jpg|The primary pump gearbox emergency override button.
FileValve and Gearbox.jpg|The gearbox and the valve shown to be activated.
FilePit worm what is this.jpg|The toxic waste starts spreading in the water, the Pit Worm wondering what is happening.
FilePit worm damn it hurts.jpg|The Pit Worm starts being hurt by the toxic waste.
FilePit worm I'm melting what a world1.jpg|The Pit Worm sinks into the toxic waste.
FilePit worm I'm melting what a world2.jpg|Ditto.
FilePit worm I'm melting what a world3.jpg|Ditto.
FilePit worm gibs.jpg|The Pit Worm is no more.
FilePit worm bridge.jpg|Shephard summons the moving bridge to leave the area.
==List of appearances==
*http//www.youtube.com/watch?v=zHVwIK9zHa0 ''Half-Life Opposing Force'' TV Spot {{1st}} {{Nc}}
*''Half-Life Opposing Force''
==References==
{{Reflist}}
{{Race X}}
{{Creatures}}
CategoryRace X creatures
CategoryCreaturesCategoryEnemiesCategoryHalf-Life Opposing ForceCategoryBosses
