{{Article|hl1|safe}}
{{Location Infobox
|image=FileWaste Processing Area 3 HL1.jpg|250px
|name=Waste Processing Area 3
|constructed=
|destroyed=200-, during the Black Mesa Incident
|location=Black Mesa Research Facility
|builder=
|era=Black Mesa Incident
|affiliation=Black Mesa
|maps=*c2a5g (HL - ''Surface Tension'')
*of4a4, of4a5 (Op4 - ''Pit Worm's Nest'')
|designer=
|hidei=
|hideu=
|hideg=
}}
{{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 '''Waste Processing Area 3''' is a Black Mesa Research Facility location featured in ''Half-Life'' and its expansion ''Half-Life Opposing Force|Opposing Force''.
==Appearances==
===''Half-Life''===
In ''Half-Life'', the player has to go through the area to enter the Lambda Bunker in the chapter ''Surface Tension''. After being chased by a Gargantua in a parking area, the player finds a Tactical Map and must use it to call in air strikes to destroy the entrance to the bunker in order to progress. The device was originally placed here by a HECU Marine named Cooper, now dead.
===''Half-Life Opposing Force''===
In ''Opposing Force'', a lower section of the facility is visited in the chapter ''Pit Worm's Nest''. The player has to active a bridge in order to progress, but there is a large alien creature Pit Worm blocking its path. The player must flood the room with toxic waste to defeat the creature. The area is accessed through an air duct in the Biodome Complex.
==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 two garbage compactors featured in ''Opposing Force'' 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 valve and the gearbox to be activated are obvious references to Valve Corporation|Valve Software and Gearbox Software, left there as Easter eggs.
==Gallery==
===''Half-Life''===
FileWaste Processing Area 3 HL1.jpg|The area.
FileC2a5g map01.jpg|The Tactical Map.
===''Half-Life Opposing Force''===
FileOf4a4 waste01.jpg|A trash compactor.
FileOf4a4 waste02.jpg
FileDead HECU pit worm.jpg|Dead HECU Marines.
FileOf4a5000000.jpg|One of the two ''Star Wars'' garbage compactors.
FileSteam vent.jpg|The steam vent lever.
FilePressure valve.jpg|The pressure valve.
FileSteam pit worm.jpg|The steam is released.
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 I'm melting what a world1.jpg|The Pit Worm sinks into the toxic waste.
FilePit worm bridge.jpg|Shephard summons the moving bridge to leave the area.
==List of appearances==
*''Half-Life'' {{1st}}
*''Half-Life Opposing Force''
{{succession
|title=''Half-Life'' story arc journey
|before=Topside Motorpool
|after=Sector F
}}
{{succession
|title=''Half-Life Opposing Force'' story arc journey
|before=Sector E
|after=Sector G
}}
{{Locations}}
{{Black Mesa}}
CategoryBlack Mesa Research Facility locations
CategoryLocationsCategoryHalf-LifeCategoryHalf-Life Opposing Force