[[quoteright:256:[[VideoGame/RocketKnightAdventures http://static.tvtropes.org/pmwiki/pub/images/eternalengine1-RocketKnightAdventures.png]]]]
[[caption-width-right:256:Stop interfering with progress!]]

->''"[[FridgeLogic what does this factory make?]] nobody knows!"''
-->-- ''VideoGame/CatPlanet!''

A vast factory complex or machine that can fill up a building, a city or even a whole planet. Its purpose [[SmokeAndFireFactory may not be readily apparent]], probably due to the sheer ''size'' of the thing. Pumping pistons act as elevators or [[SmashingHallwayTrapsOfDoom crushers]], conveyor belts cover half the floors, and you can expect something to try to [[EverythingTryingToKillYou squash you flat]] sooner or later. Needless to say, [[MalevolentArchitecture this would not be a fun place to work]]. The Eternal Engine may be the insides of the ForgottenSuperweapon, or PollutedWasteland for a technologically inclined BigBad. In either case, you usually run into it as one of the final stages.

Enemies are usually {{Mooks}}, MechaMooks, even more Mooks, sentry guns, and, probably more than any other level save LethalLavaLand, [[NoOSHACompliance the environment itself]]. Expect conveyor belts to end over BottomlessPits, pipes leaking superheated steam, if not fire, exposed electrical conduits, and huge vats and/or nasty spills of [[TechnicolorScience fluorescent green chemicals]] and toxic waste. Also expect a [[SmashingHallwayTrapsOfDoom hall of giant alternating pistons]]. Expect hectic, intense and sometimes [[ElectronicMusic electronic]] music to match the level theme.

Not surprisingly, Eternal Engine often fills in for, or [[HailfirePeaks is combined with]], LethalLavaLand. In which case, either the machine runs on Geothermal power, or it may have vast bodies and such of molten metal rather than lava. Expect ConvectionSchmonvection to play out in full force either way.

Named after a stage in ''VideoGame/SonicAdventure2'' (which was actually in a giant space station if you want to get technical, but it sounds cooler, so be quiet).

See also NoOSHACompliance, NightmarishFactory. Also see WombLevel, the living version. You may have been looking for PerpetualMotionMachine.

----
!!Examples:

[[foldercontrol]]

[[folder: Anime and Manga ]]

* The Steam Castle from ''{{Steamboy}}''. Not only is it ridiculously complicated on the inside, with giant pistons and wheels, but also incredibly dangerous on the outside as it [[spoiler:freezes whatever it flies over]].
* ''{{Blame}}'' takes place in a world where there is no non-artificial environment at all. It is revealed that the world is essentially one massive dyson sphere.

[[/folder]]

[[folder: Comic Books ]]

* After {{Superman}} comes back to life during Reign of the Supermen, he joins Steel and Superboy in assaulting Engine City, a gigantic engine built over the ruins of Coast City by Mongul and the Cyborg Superman.
* During the JLA's "World War Three" story arc, Superman invades the eternal engine an intergalactic threat named Maggedon has sent to Earth.
* War World, former base of [[GreenLantern the Sinestro Corps.]]

[[/folder]]

[[folder: Film ]]

* Perhaps the UrExample is the one below the city in Film/{{Metropolis}}.
* The ancient underground Krell machinery, which was roughly 40 miles long on one side, in the sci-fi classic ''ForbiddenPlanet''.
** 40 miles long, in the shape of a ''cube'', and full of fusion reactors. The amount of energy output is enough to power all of a (long dead) civilization's needs, or [[spoiler: blow the planet to smithereens if set to overload because [[YouAreNotReady humankind is not ready]].]]
* The droid factory in ''Franchise/StarWars Episode II: Film/AttackOfTheClones'' is a textbook LethalLavaLand example, using molten metal as the lava.
** And Mustafar in ''Episode III: Film/RevengeOfTheSith'', where the eternal engine is set in a LethalLavaLand.
* In the 1997 version of ''Film/{{The Borrowers|1997}}'', a milk-bottling factory is this from the Borrowers' perspective.
* V'Ger in ''Film/StarTrekTheMotionPicture'' is a machine so vast it could (as Uhura and [=McCoy=] say "hold a crew of tens of thousands...Or a crew of 1,000 that are ten miles tall," and the 'Enterprise' spends a large portion of the film inside it. When viewing V-Ger's holographic memory, Spock sees a "machine planet' which he speculates may be V'Ger's homeworld.
* ''Ember'' in ''CityOfEmber'' is not ''all'' engine, but between the generator and the pipeworks a ''lot'' of it is made up of constantly running machinery.

[[/folder]]

[[folder: Literature ]]

* In Creator/AndreNorton's ''Uncharted Stars'', the [[spoiler:[[{{Precursors}} Forerunner]] factory world to which the star map bowl led, which was the source of the zero stones]].
* ''Literature/TheDeathGateCycle'' featured a floating island-machine, the Kicksey-Winsey. This machine is so vast and complex that in the centuries after its designers had abandoned it, the enslaved dwarves left to run it have turned their acts of maintenance and assembly into a religion; they no longer understand why the machine does anything, but have managed to keep it operational.
* The young Jedi Knight series and some other Expanded Universe books include the rocky planet Mechis III. The entire planet is covered with droid factory complexes and during the reign of the Empire it was even owned by a single company, Arakyd Industries. Less than 100 biological employees live on the planet, the rest of the population is millions of droid workers. And yes, Mechis III has plenty of volcanic activity, so it has elements of LethalLavaLand as well.
* In Creator/RogerZelazny's ''Jack of Shadows'', there is a Machine at the Heart of the World (the purpose of which is to stop the Earth from rotating).
* In TimothyZahn's ''Spinneret'' humans stumble, by sheer chance, on a huge alien machine hidden inside a mountain, which has been [[RagnarokProofing dormant but active]] for millennia. It turns out to be a gigantic extruder, which absorbs any metal in and on the planet itself to make super-sticky string, originally destined [[spoiler:to shield a whole solar system from detection]]. It houses enormous amounts of machinery, not to mention an artificial environment for the original workers and at least one fully working spaceship.
* In Creator/AnneMcCaffrey's ''The Ship Who Won,'' the "magic" discovered on an alien world is powered by [[spoiler:an enormous weather-control system inside the planet, which the mages are abusing to cast "spells"]].

[[/folder]]

[[folder: Live Action TV ]]

* In ''[[Series/BabylonFive Babylon 5]]'', the Great Machine of Epsilon III was an {{homage}} to ''ForbiddenPlanet''. It is seen in the episodes "A Voice in the Wilderness", "The Long, Twilight Struggle", "Voices of Authority" and "War Without End".
** Homage in the sense of a 1990's remake complete with giant vertical shaft with elevator globes.
* The ''Series/DoctorWho'' 16th season story ''[[Recap/DoctorWhoS16E2ThePiratePlanet The Pirate Planet]]'', which was also Creator/DouglasAdams' debut as a writer for the series, features a [[spoiler:planet]] that exploitatively harvests raw materials. The Doctor must undertake some very risky maneuvers in order to shut it down.

[[/folder]]

[[folder: Tabletop Games ]]

* ''TabletopGame/DungeonsAndDragons''' Clockwork Nirvana of Mechanus, which is an ''entire plane of existence''. Naturally, [[ClockworkCreature Clockwork Creatures]] live there.
** On a much smaller scale, the ''TabletopGame/{{Planescape}}'' campaign also has The Foundry, a ''huge'' factory in the Lower Ward of Sigil that was the headquarters of the Godsmen. Unlike most examples of this Trope, it had a known and useful purpose (it made all metal goods needed in the city except weapons, such tools, nails, pots, pans, and utensils) but it could still be used in any adventure that called for an Eternal Engine.
* Autochthonia from ''TabletopGame/{{Exalted}}'' is an entire ''pocket dimension'' of this. [[GeniusLoci It's also a god]]. And it's winding down...
** There's also the lower levels of the Imperial Manse, a superweapon capable of annihilating small countries with a shot. It was built by Autochthon (the aforementioned god, although he's technically a Primordial, which is a step up), who can't be harmed by machines, so he didn't really think to put up much in the way of [[NoOSHACompliance safety]] around the giant gears, pistons, plasma jets etc.
*** On the other hand: do you really want someone who ISN'T exceptionally careful, logical and prudent to get to the controls of the most powerful weapon currently in creation?
* Many of the Imperium's typical [[AltumVidetur "manufactora"]] in ''TabletopGame/{{Warhammer 40000}}''. Calling one a "small city" is a severe understatement for some of the bigger ones. Then you have the Forge Worlds, which are ''entire planets'' covered with factories and industrial facilities.
** Necron tomb complexes often carry this theme, though Necron technology bears little resemblance to human tech, or anybody else's for that matter. Case in point being the [[PlanetSpaceship World Engine]].
* Mirrodin from ''TabletopGame/MagicTheGathering'' is an entire plane made out of metal in which most of its inhabitants have metal as a part of their bodies. Unfortunately, this made the plane a prime candidate to be a new base for operations for the {{cyborg}} [[TheCorruption Pyhrexians]] , [[VillainWorld leading them to remake the world into New Phyrexia]].

[[/folder]]

[[folder: Video Games ]]

* [[TropeNamer Of course]], damn near ''every Franchise/SonicTheHedgehog'' game has at least one of these, sometimes more than one: [[VideoGame/SonicTheHedgehog Scrap Brain Zone]], [[VideoGame/SonicTheHedgehog2 Metropolis Zone, Chemical Plant Zone]], [[VideoGame/SonicAdventure2 Eternal]] [[TropeNamer Engine]], and [[VideoGame/SonicAdventure Final Egg]]ójust to name a handful. {{Justified|Trope}} by Robotnik's MadScientist nature.
** One of the most overboard was from [[VideoGame/SonicAdventure2 the same game]] as the TropeNamer: Cannon's Core, the {{Magitek}} innards of a space station built using modern robotics and ancient mysticism. The deeper the characters went, the more the mystic elements began to eclipse the mechanical ones.
*** Aside from the TropeNamer and [[MarathonLevel Cannon's Core]], ''[[VideoGame/SonicAdventure2 Adventure 2]]'' also has [[GravityScrew Crazy Gadget]] and [[BlackoutBasement Lost Colony]].
** Sometimes the designers like to [[HailfirePeaks mix it up a bit]]. Chemical Plant Zone, for instance, heads UnderTheSea. And then there's ''VideoGame/SonicTheHedgehogChaos'''s Mecha GreenHillZone...
** [[VideoGame/SonicRushSeries Machine Labyrinth]] stirs it a bit with a {{Steampunk}} theme.
** [[VideoGame/SonicStorybookSeries Evil Foundry]] is the LethalLavaLand kind.
** ''VideoGame/SonicUnleashed'' goes overboard with Eggmanland, an Eternal Engine '''continent'''. With CircusOfFear elements.
** From the ''VideoGame/SonicAdvanceTrilogy'', we have Secret Base Zone, Cosmic Angel Zone, Hot Crater, Ocean Base (once again combining this with UnderTheSea),...
** Gene Gadget and Panic Puppet Zones from ''VideoGame/Sonic3DBlast''.
** Techno Base in ''Sonic Advance 2'' is an Eternal Engine set in {{Cyberspace}}.
** Aquatic Base from VideoGame/SonicTheHedgehog2006, combining it with UnderTheSea.
** Mad Gear Zone from ''VideoGame/SonicTheHedgehog4: Episode I''.
*** Oil Desert Zone and Death Egg mk.II Zone from 'Episode II''. Oil Desert Zone combines this with ShiftingSandLand and DownInTheDumps (Act 3 only).
** Planet Wisp from ''VideoGame/SonicColors'' has some, especially Planet Wisp -- the Eternal Engine is still under construction, but much of the [[GreenHillZone natural beauty]] has [[GreenAesop already been spoiled]].
*** Asteroid Coaster is a straighter example from the same game. Mixed with BigBoosHaunt and ThemePark of course, but it's where Eggman converts the wisps to the Negawisps. [[LevelAte Sweet Mountain]] has very slight elements of this.
** The Labyrinth of the Factory from ''VideoGame/SonicLabyrinth''.
** The aforementioned Chemical Plant and Planet Wisp both reappear in ''VideoGame/SonicGenerations''.
** ''[[VideoGame/SonicTheHedgehogCD Sonic CD]]'' [[HailfirePeaks combines]] most levels' current setting trope with this in {{bad future}}s. Wacky Workbench is this in the Present and Past as well as the Bad Future, but becomes ToyTime in the Good Future. Metallic Madness is this full-time.
** Silver Castle Zone in ''VideoGame/SonicBlast''
** Atomic Destroyer in ''VideoGame/SonicTheHedgehogTripleTrouble''
** Secret Plant and Gigantic Angel in ''SonicPocketAdventure''
** Reactive Factory from ''VideoGame/SonicR''
* The ''Franchise/FinalFantasy'' series, despite not being a platformer series, like this trope a lot, with quite a few of its games being set in a {{Steampunk}} environment. Deserving special attention is Nibelhelm's Mako Reactor in ''VideoGame/FinalFantasyVII'' for having lots of plot-important [[TechnicolorScience fluorescent green chemicals]].
** There's also ''VideoGame/FinalFantasyVI'''s Magitek Research Facility in [[TheEmpire Vector]]. [[InconvenientlyPlacedConveyorBelt Conveyer belts]], a trash dump, and big glass tubes of chemicals with [[spoiler:Espers inside, being drained of their magical energy courtesy of [[ReluctantMadScientist not-so-mad scientist]] Cid]]. All set to the track 'Devil's Lab', which can only be described as industrial rock with piston percussion, growling electric bass and organ, and strings.
** Even as far back as ''VideoGame/FinalFantasyIV'', we have a rather interesting case, namely when the party enters [[spoiler:the Giant of Babil.]]
* ''VideoGame/CommanderKeen'': The second installment is set entirely within the Vorticon Mothership, while the fifth installment is set entirely within the titular Armageddon Machine. Both settings feature most of the classic hazards, as well as evil machines (cannons in the second game, generators in the fifth) that have to be disabled so the titular character succeeds on his mission.
* Grunty Industries, Nutty Acres and Logbox 360 from the ''{{Banjo-Kazooie}}'' series.
* ''VideoGame/{{BioShock|1}}'' features Hephaestus, described by the soundtrack as "the Engine City." It's an enormous power plant that funnels geothermal energy (and what looks like magma) through colossal engines to power all of the underwater city of Rapture. However, it's not especially "eternal," as, like all the rest of Rapture, it's in the process of falling apart, and one of the missions involves strapping an EMP bomb onto one of the engines.
* The Clock Tower in any ''Franchise/{{Castlevania}}'' game.
** ''Videogame/CastlevaniaBloodlines'' has a relatively modern factory level. Not too surprising, since the game takes place across Europe during UsefulNotes/WorldWarOne.
* The third quarter of the original ''Videogame/CrashBandicoot1996'' consists mostly of this (levels such as Heavy Machinery, Cortex Power and Generator Room), with Crash roaming through Cortex's enormous power plant which, on the surface, doesn't seem to serve much of a purpose other than to dump tons and tons of radioactive sludge into the nearby oceans.
** The late-game stages of ''Videogame/CrashBandicoot2CortexStrikesBack'' and ''Videogame/CrashBandicoot3Warped'' also indulged quite a bit on this.
* The Gremlin Village and the It's a Small World ride in ''DisneyEpicMickey'' are filled with gears, steam-leaking pipes, and generic steampunk elements. Both cases are justified, since the Gremlins are all mechanics and most, if not all of the rides in the Cartoon Wasteland probably use outdated technology. (Except for {{Tomorrowland}}, of course.)
* ''VideoGame/DonkeyKong'' examples:
** Frantic Factory of ''VideoGame/DonkeyKong64''.
** And the factory levels in ''VideoGame/DonkeyKongCountry 1'' and ''3''.
** A handful of levels in both ''DK: King of Swing'' and ''DK: Jungle Climber''.
** World 7 in ''VideoGame/DonkeyKongCountryReturns''.
* ''VideoGame/EccoTheDolphin'' features Welcome to the Machine, a giant alien meat grinder and the ScrappyLevel to end all {{Scrappy Level}}s. It makes a ''slightly'' less insane return in the sequel ''Tides of Time''.
** ''Defender of the Future'' has about a quarter of the game be one of these due to the Man's Nightmare levels, which has you following the process of mining rocks for crystals to the end result down the factory line, over the span of multiple, multiple levels. Not half as annoying as it sounds because the place is designed so well.
* The Dwemer ruins in ''VideoGame/TheElderScrollsIIIMorrowind'' are powered by geothermal energy and manned by complicated enchanted automations who mindlessly perform security and minor repairs on these forgotten cities. The Dwemer were also about to experiment with the power of a [[PoweredByAForsakenChild dead God]] when they were cast out of reality by it.
* The ''Residue Processing'' stage in ''VideoGame/{{Half-Life|1}}'' certainly qualifies here.
** The final Citadel level of ''VideoGame/{{Half-Life 2}}''.
* ''VideoGame/IndianaJonesAndTheInfernalMachine'' has a kind of ancient-stones version on several levels.
* ''VideoGame/Kirby64TheCrystalShards'' features one as the fourth level in the game's resident SlippySlideyIceWorld, complete with giant machines trying to crush you, robots, rooms full of molten lava, and inexplicable giant animals floating in tanks of water.
** It's also [[EarthAllAlong implied to be Earth.]]
** The giant animals might be bizarre toys, if the Christmas theme of the earlier levels is any indication. Earth apparently fell into a nuclear winter... during winter.
*** See also the Egg Engine world in ''VideoGame/KirbysReturnToDreamland'', which looks positively [[SonicTheHedgehog robotnikian]].
* The Great Bay Temple from ''TheLegendOfZeldaMajorasMask'' combines this with DownTheDrain.
** ''[[VideoGame/TheLegendOfZeldaSkywardSword Skyward Sword]]''' combines this with ShiftingSandLand and TomorrowLand with the Lanaryu Mining Facility.
* ''VideoGame/SuperMarioRPG'' had Smithy Factory from the original game as one of these types of areas, and it was also an OminousFloatingCastle. The X-Naut Fortress in ''[\VideoGame/PaperMarioTheThousandYearDoor'' also has aspects of this.
** ''VideoGame/SuperMarioGalaxy'' had Battlerock Galaxy and Dreadnought Galaxy, particularly in the 2-D sections.
*** ''VideoGame/SuperMarioGalaxy2'' has Chompworks Galaxy.
** ''VideoGame/SuperMario64'' has Tick-Tock Clock.
*** Also Rainbow Ride, which has all the right platforms, just not the theme.
*** The Bowser levels are also a few thematic elements away from being Eternal Engines.
** Earlier in ''VideoGame/PaperMarioTheThousandYearDoor'', there is a train station that seems to be abandoned and has elements of this.
*** Some parts of the [[spoiler: Palace of Shadow]] as well.
* Luigi's Engine Room of the first ''VideoGame/MarioParty'' was this until someone became the Super Star. Turned out that the engine was powering a flying machine of some kind.
* The Old Clockworks of ''VideoGame/LuigisMansionDarkMoon'' is like this, except that it's (mostly) shut down.
* In ''VideoGame/MarioKart'', Toad's Factory, a race course from ''Mario Kart Wii'', features some elements of this trope, being a factory with crushing machines, conveyor belts, a steam room, and bulldozers that move back and forth periodically across a mud path at the end of the course.
* Metal Man's level in ''VideoGame/MegaMan2''.
** ...and Spark Man's level from ''VideoGame/MegaMan3'', and Dust Man's level from ''4'', and Mercury's level from ''V'' for the Game Boy, and Junk Man's level from ''7'', and Grenade Man's level from ''VideoGame/MegaMan8'', and Plug Man's level from ''9''...it'd probably be easier to list the games that ''don't'' have one. As with the Sonic series, [[JustifiedTrope justified]] by Wily's MadScientist nature.
** ''VideoGame/MegaManX'' has Flame Mammoth's factory. With inconveniently placed conveyor belts that crush rubbish for no particular reason. ''VideoGame/MegaManX6'' also had Metal Shark Player's stage as one of these.
*** It's a recycling facility.
** ''VideoGame/MegaManZero'' usually fit 2 or sometimes even 3 into each game.
** And in ''[[MegaManZX ZX]]'', the entire world itself is basically cybernetic to an extent.
* Happens frequently in the ''VideoGame/MetroidPrime'' series, to varying degrees. Magmoor Caverns in the first falls into the "combined with Lethal Lava Land" variety, and the Phazon Mines have their fair share of machinery obstacles. ''Prime 2'' features the technologically-themed [[TempleOfDoom Sanctuary]] Fortress, and ''Prime 3'' has the {{Steampunk}}-inspired region [[FloatingContinent Sky Town]] on the planet Elysia, complete with enemies with names like "Tinbots", "Steambots", and "Steam Lords", and the Pirate Homeworld.
** ''Metroid Prime Hunters'' has Samus morph ball into a boiler and dodge its eternal workings while trying to find [[ScrappyLevel something]].
** The entire setting of ''VideoGmae/{{Metroid}} Fusion'' is a Biologic Space Laboratories research station, a huge space station that simulates a variety of natural environments, thus most of the levels [[HailfirePeaks have a few Eternal Engine aspects to them]].
*** Same with ''VideoGame/MetroidOtherM''.
* The [=EvilToyCo.=] Factory in ''[[VideoGame/NicktoonsUnite Nicktoons: Attack of the Toybots]]'' is an gigantic factory churning out legions and legions of evil LivingToys. You effectively spend ''nearly all of the game'' in it.
* Sekto's Dam in ''VideoGame/OddworldStrangersWrath'' is basically what you would get if you mixed a dam, bottling plant, and [[NoOshaCompliance DEATH]]. It's one of the few areas with BottomlessPits in the game.
** In a bit of FridgeLogic, Sekto keeps two large reactor type objects that he apparently uses as weapons right next to his desk, which like most equipment in an Eternal Engine, ''[[ExplosiveInstrumentation will explode]] if you shoot it enough''. Apparently he either really wants to be a LoadBearingBoss, or he doesn't care about his own safety.
** Not to mention the entirety of Rupture Farms, which half of the first game takes place in.
* The behind-the-scenes sections of ''VideoGame/{{Portal}}'''s Aperture Science Enrichment Center, excepting the (scarce by comparison) office areas.
** The sequel takes this up to eleven, where apparently the entire facility's operations is to churn out products for testing against other products. While there are facilities to manufacture products (indeed Wheatley apparently was able to design and mass produce his own robots) there seems to be no way of shipping them, only to continue sending them back into tests. [=GLaDOS=] and Wheatley also seem to have little else other than to continue testing for their entire lives.
* Most of ''VideoGame/{{Prey}}'' takes place in a planet-sized Eternal Engine. The aliens live in a giant artificial sphere in which every room, corridor and passage is strewn with wires, pipes and machinery of all sorts (not always inoffensive).
** Of course, since the sphere also has a [[OrganicTechnology biological component]], parts of it also take place in a direct [[WombLevel biological counterpart]] to an Eternal Engine, with loose pools of digestive juice, sphincter doorways, bleeding walls, vomiting sphincters, BodyHorror MixAndMatchCritter-weapons, MookMaker sphincters, and that sort of fun stuff (with [[FreudWasRight sphincters]]).
* The factory level in ''VideoGame/QuakeII'' was a large complex in which human and mechanical parts were cut'n'pasted together (with no anesthetic...) to form Strogg soldiers. The machinery had more psychological effects and less gameplay consequences than most Eternal Engine environments, but the player was required to avoid a giant crusher or two and step on a few conveyor belts. Activating the human-mulching machines was [[VideogameCrueltyPotential optional]].
** Then, ''VideoGame/QuakeIV'' lets you go through a similar factory, with a twist: [[spoiler: ''you'' are the one [[StrappedToAnOperatingTable strapped to a platform]] and being Stroggified.]]
* ''VideoGame/Rayman3HoodlumHavoc'' features a level called Hoodlum Headquarters, an elaborate factory base [[LethalLavaLand full of lava]].
* ''VideoGame/RaymanOrigins'' features one of these complete with molten metal.
* The aptly named Planet Automaton in ''VideoGame/{{Ristar}}'' is an entire planet made out of machines and populated by robots.
* The Star Forge, the final level of ''VideoGame/KnightsOfTheOldRepublic'', is an ancient, giant, evil factory slash ForgottenSuperweapon drawing its power from the star in whose corona it hovers.
* The image at the top is of the Steel Works level from ''VideoGame/{{Sparkster}}'' for the SNES, although it's far from the only Eternal Engine level in that series; at least half of the levels in that series could be considered variations on the concept.
* The Island of the Ancients in the Subspace Emissary, from ''VideoGame/SuperSmashBros Brawl''.
* ''VideoGame/TalesOfSymphonia'' has one, the Welgaia escape route, within the [[BestLevelEver Tower Of Salvation]]. It has the slippery aspect of a SlippySlideyIceWorld, due to it being in space, and thusly having zero-g sections.
* ''VideoGame/TalesOfVesperia'' has Ghasfarost, the [[ItsAllUpstairsFromHere Tower of Gears]].
* ''Franchise/TombRaider'' has loads. Natla's Mines, Offshore Rig, Fool's Gold, Lud's Gate, Shakespeare Cliffs and Kazakhstan's Project Karbonek.
* The ''VideoGame/WarioLand'' series had the Mysterious Factory from ''VideoGame/WarioLandII'' and the Curious Factory from ''VideoGame/WarioLand4''.
* In ''VideoGame/WorldOfWarcraft'', the Gnome capital city-turned-dungeon, Gnomeregan, is a giant SteamPunk factory city.
** The same game also features the interdimensional spaceship(s) of Tempest Keep (including the Exodar, which serves as the Draenei races' home area), although the hazards normally inherent to Eternal Engines do not show up here, limiting the use of the design to be mostly thematic in purpose.
** Various bits and bobs of Titan technology can be found throughout Northrend. Many of them seem to be gigantic engines of some kind, though very few of them are working.
** The ruins of Uldum are less about gears and more about beam emitters, computers and robots made out of stone.
* The [=FireCage=] in ''AnUntitledStory'' is an abandoned but still partly operational underground factory or power plant of some kind. The pools of molten metal or rock found here and there give it elements of LethalLavaLand.
* ''VideoGame/JazzJackRabbit'': The planets Tubelectric, Letni, Orbitus, Technoir, Dreempipes, Industrius, Deckstar, and the Megairbase and the Twin Battleships. Also the abandoned lab levels in VideoGame/JazzJackrabbit 2.
* ''VideoGame/ShadowComplex'' has an area like this. Justified in that the purpose of the factory is explicitly explained as building the mechs and weapons.
* ''DungeonSiege'' and its expansion ''Legends of Aranna'' both feature these, both populated by Goblins, themselves mechanical creatures. The former is the goblin's home, and the latter is the great clock you've been heading for the entire game.
* There are a couple massive ones in ''VideoGame/BlueDragon'', and at the end of the game you find out the [[spoiler: entire ''planet'' is one]]. The term "Eternal Engine" itself is used to refer to the Ancient machine's power sources.
* The Great Clock from ''RatchetAndClankFutureACrackInTime''.
** Planet Quartu from [[VideoGame/RatchetAndClank2002 the first game]]. [[FridgeBrilliance Both have similar origins.]]
* ''VideoGame/{{Klonoa}} 2: Lunatea's Veil'' features the factory levels in Volk, constantly churning out bombs, planes, and, apparently, soldiers for Volk's neverending civil war. The Maze of Memories level may qualify as well, though the 'machinery' all runs in the background, and doesn't seem to affect gameplay at all.
* ''Franchise/{{Pokemon}}'' has its various power plants. It's not as severe as some examples, since the other danger in them is the hordes of Electric and Steel monsters and the occasional lightning bird.
* ''VideoGame/TerminalVelocity'' has the Moon Dagger in episode 1 (essentially a huge spaceship), and the massive supercomputer planet which makes up the last two levels of episode 3.
* ''VideoGame/SkyGunner'' Well. Quite literally.
* The entirety of the Arca Plant levels in ''VideoGame/PhantasyStarZero''. Mechanical enemies, machinery in the background that becomes larger and more complex, and a giant robot at the end who more than counts as a ThatOneBoss to a degree that the final boss and bonus boss seem like child's play in comparison.
* Although mentioned below for its other appearances in fiction, the planet Cybertron in ''TransformersWarForCybertron'' is worth noting, since it is literally an ''entire game'' set inside, outside, and on top of a massive eternal engine. It even features a level ''inside another character who is himself an eternal engine''.
* Sector 6 of ''VideoGame/{{Jumper}} Two'' takes place in [[BigBad The Boss]]' factory of [=OgmoBots=]. Ogmo can, and will, have to interfere with production to progress. The Boss even [[InvokedTrope invoked]] MalevolentArchitecture in this sector.
* Large part of ''VideoGame/{{Limbo}}'' takes place there.
* The Bacterian Fortress in the ''VideoGame/{{Gradius}}'' series, and the "green slime plant" in ''V''.
* Doctor Octopus' level in ''VideoGame/SpiderManShatteredDimensions''.
* [[DurableDeathtrap The Primagen's Lightship]] and the Oblivion Warp Portals from ''[[VideoGame/{{Turok}} Turok 2]]'' would both count. However, the Portals are more true to the aesthetics of the trope, as each one contains a healthy dose of grim, industrial architecture complete with pumping pistons, steam valves, chains dangling ominously from the ceiling, pits of magma and all the other goodies.
* The Sun Temple in ''VideoGame/{{Aquaria}}'' is a clockwork Eternal Engine; you can even pilfer the key and use it to decorate your cave (which inexplicably has chambers constructed in the style of every locale you visit, including the Sun Temple). In spite of having supposedly been abandoned for quite some time, it's still running and shows no signs of decay; possibly the clockwork sea life lurking around are automated maintenance staff, keeping one another wound as well as making sure the temple stays in working order, after their masters are long dead.
* ''VisualNovel/NineHoursNinePersonsNineDoors'' had [[spoiler: a recreation of the ship Gigantic/Brittanic's engine. Of course, it's only as imposing as the RealLife one is.]]
* Xizor's Palace in ''VideoGame/ShadowsOfTheEmpire'', complete with giant gears that Dash must navigate.
* [[TheVeryDefinitelyFinalDungeon Telos]], and to a lesser extent Effluvia (combined with DownInTheDumps and LethalLavaLand) and Utopia, in ''VideoGame/TheAdventuresOfRadGravity''.
* The Mechanical age in ''VideoGame/{{Myst}}'' is a ClockPunk version of this.
* ''VideoGame/LunarTheSilverStar'' has the Grindery, which you later explore in ''VideoGame/LunarEternalBlue'' as "Taben's Peak".
* The ''Franchise/BreathOfFire'' series has Obelisk (''VideoGame/BreathOfFireI''), Highfort (''VideoGame/BreathOfFireII''), and the remains of Caer Xhan and Station Myria (''VideoGame/BreathOfFireIII'').
* The Mad Hatter's Realm from ''VideoGame/AmericanMcGeesAlice'' and its sequel, ''AliceMadnessReturns''. It's a massive, floating structure of ClockPunk machinery that mostly seems to be devoted to making BodyHorror and [[ArsonMurderAndJaywalking tea]].
* ''VideoGame/LegendOfKalevala'' has an underground factory area underneath the first area. It's full of FloatingPlatforms, and it's the first place where you'll find [[LavaPit Lava Pits]]. This area is one of the tip-offs to the protagonist that the former inhabitants of Kalevala were a very intelligent civilization.
* The ''VideoGame/BatenKaitos'' games have the city of Mintaka, which is built out of pipes that are constantly emitting steam of some sort. ''Origins'' refers to it as 'machina' and discusses the ethics it presents.
** ''Origins'' also has Tarazed, which is a man-made airship the size of a continent.
* Stages 4 and 5 in ''VideoGame/JourneyToSilius'', which include crushing pistons, falling crates, moving SpikesOfDoom, pits of molten metal, and conveyor belts. And the latter is an [[AutoScrollingLevel auto scroller]] for some reason.
* ''VideoGame/ResonanceOfFate'' has Basel, which is not only an Eternal Engine (of gears!), but is also the entire OverworldNotToScale in which where the game takes place, and is apparently the last bastion of human civilization. Not so eternally however, it's at its last legs by the game's start.
* Archive 4, "Passion", in ''VideoGame/ChildOfEden''.
* "Inside the Claw Machine" in ''VideoGame/ToyStory''.
* The planet "Facility", in the ''[[Videogame/BattleZone1998 BattleZone II]]'' mod, ''Forgotten Enemies''. The planet is covered almost entirely in machinery, with huge cranes, fuel tanks, and heat sinks dotting the surface. The atmosphere is tainted green, and the only exposed land is brown, lifeless rock.
* World 6-F1 (RGB Factory) in ''VideoGame/SuperMarioFusionRevival'': This fortress level takes place in a high-tech factory with three distinct areas: a red area (lava and fire), a green area (overrun with plant life), and a blue area (a swimming area). This is a key hunt level with a central hub that leads to a boss fight with Dobkeratops of R-Type fame.
* [[CatPlanet cat planet!]] [[CaptainObvious it has one!]] [[AllLowercaseLetters as stated in the page quote!]] [[MemeticMutation cat planet cat planet cat planet!]]
* From ''VideoGame/SlyCooperAndTheThieviusRaccoonus'', a couple of levels in Sir Raleigh's fortress take place in the engine rooms, complete with enormous cogs and gears, fiery furnaces, and electrically charged fan-blades.
* Stage 6 (Laboratory) in ''VideoGame/MoonCrystal''.
* The Axis Chemical Factory in any LicensedGame based on the movie ''Film/{{Batman}}''.
* The factory level in ''VideoGame/{{Vessel}}''.
* ''VideoGame/TinyToonAdventuresBustersHiddenTreasure'' has a factory as its final world, complete with various robot enemies, spikes, electric reactors, a lava-filled floor in the third act, and various spinning gears, wrecking balls, and platforms Buster must maneuver across to get past them.
* The ''Taz-Mania'' video game for the Sega Genesis/Mega Drive has a robot factory as its second world. Various hazards include spinning blades, furnaces, hammers, laser cannons, tunnels that shock you which you have to find the right switch to temporarily turn them off with, and decoy switches that shock you when you pull them.
* Team Meat's ''VideoGame/MeatBoy'' features the Salt Factory, which features buzz saw launcher, salt and even rocket launcher.
* Stage 7 of ''VideoGame/TheLegendaryAxe II'' is this, even though it's supposed to be someone's royal palace.
* Many areas in ''SpiralKnights'', particularly the Ironclaw Munitions Factory. Given the constructed nature and the ever-shifting mechanized innards of Cradle, the whole planet is arguably an Eternal Engine.
* ''VideoGame/BatmanArkhamCity'' has the Steel Mill. A very realistic example, too. The only LethalLavaLand type area is the furnace you go through when you start off. Everything else, well, the mill is just the base where Joker is hiding out and isn't running, making this a SubvertedTrope. Batman has to make things run himself to get through it, hitting switches and getting (more like making) a gadget that lets him fire Remote Electric Charges to power devices. The conveyer belts are completely still, even, except for one secret area where you complete a batarang mini-game for a trophy.
* ''VideoGame/ChronoTrigger'' has you go through one on your first trip through TheFuture. Although it's a factory, you're required to go through it to power a machine in a different location. You can ride conveyer belts, operate cranes and fight rogue construction bots.
** There's also one much later in the game, although it isn't an actual factory. It's called Geno Dome, or in the japanese version, '''Genocide''' Dome. Halfway through the level, you find out exactly what the factory is running for: [[spoiler:Humans systematically being murdered so that only robots are left to rule the world.]]
* In ABoyAndHisBlob, the first 4 levels of the fourth world are this.
* The Pig Bart level from ''Virtual Bart'' involves Bart (as a pig) rescuing other pigs from Krusty's Pork Factory. The level also contains a [[Main/SlippySlideyIceWorld freezer section]] and a [[LethalLavaLand furnace section]].
* The [[spoiler: ''entire freaking Mechonis'']] in ''{{VideoGame/Xenoblade}}''.
* In ''VideoGame/ViceProjectDoom'', the eighth level is an industrial complex with conveyor belts and surging electricity everywhere.
* In ''[[Videogame/{{Portal2}} Portal 2]]'', you get to explore some of the various automated facilities and pneumatic tube systems that supply Aperture Laboratories.
* ''Videogame/AmnesiaAMachineForPigs'' has the titular Machine. This time, we ''do'' find out what it makes ([[spoiler:[[PoweredByAForsakenChild vitae]], Manpigs, and [[BloodMagic industrialized human sacrifices and the power that comes from them]]]]), and the PC and the Machine's controller ([[spoiler:actually [[GeniusLoci the machine itself]]]]) argue throughout the entire game.
* The Space Hideout in ''VideoGame/{{Something}} Else'', because the graphics are ripped directly from Scrap Brain Zone Act 2, another Eternal Engine level.
* ''VideoGame/LaMulana'' features the Tower of Ruin, especially in the [[VideoGameRemake remake]]. In the original, the mechanical basis of the level isn't quite as pronounced because there's no moving machinery. Naturally, there's magma everywhere, but that's justified because it's located right behind the game's local magma world.

[[/folder]]

[[folder: Webcomics ]]

* In ''Webcomic/{{Homestuck}}'', the planet in the medium LOHAC (Land of Heat and Clockwork) is a sort of Eternal Engine, with the vast majority of it being lava, gears, and metal building skeletons.

[[/folder]]

[[folder: Western Animation ]]

* The radioactive waste plant in ''WesternAnimation/TeenTitans'' is a very good example.
** Slade had one for a lair during the first season. And guess where he chose to reveal himself to the Titans after [[spoiler:coming back from the dead]]?
* The planet Cybertron in ''{{Transformers}}''. In its various incarnations it is depicted with all kinds of huge machinery all over the planet, with good reason - the entire planet was a Transformer. Then there is Unicron, whose insides are an even more literal take on the Eternal Engine Planet trope, and his tentacle horror Japanese cousin Dark Nova. The later US comics from Marvel also introduced the Decepticon War World.

[[/folder]]

[[folder: Real Life ]]

* The mines at the Athabasca Oil Sands in Alberta, Canada.
* Jamnagar Refinery, India
* Three Gorges Dam, China
* Boeing's Factory in Everett, Washington State, the largest factory in the world.
* [[http://www.bharatpetroleum.com/EnergisingEnvironment/MumbaiRefinery.aspx?id=3 Bharat Petroleum]] in Mumbai, the inspiration for the Mothership in CloseEncountersOfTheThirdKind.
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