''Enthalpy'' (also known as ''Project Enthalpy'') is a multimedia WebOriginal series created by Nicholas Walstrom, formerly known as WebAnimation/WalrusGuy. [[http://projectenthalpy.com/ The site]] features cartoons, games, and comics, all set in the same universe.

The series follows the bizarre adventures of three young boys (Nicholas, Charles, and Udesky), and the strange events that occur in Fort Ellen, the CrapsaccharineWorld they live in. They must also frequently deal with Nicholas' "archenemy", the evil pig/human/Pillsbury Doughboy hybrid Piggly Oink (who has yet to actually appear in the series). The series relies heavily on SurrealHumor, as well as some healthy doses of NightmareFuel.

The characters were created by Walstrom around 2001, when he made several comics and stories based around them. They debuted on the web in some animations posted on {{Website/Newgrounds}} between 2005 and 2008, and Nicholas appeared in a pair of [[AdventureGame Adventure Games]], ''Nicholas' Weird Adventure'' and ''Nicholas' Weird Adventure 2'', in 2005 and 2007. The website itself debuted in 2010.

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!!The series as a whole contains examples of:

* AlternateHistory: The series takes place in the year 2001. In the year 2001, advanced genetic engineering is commonplace and children fly hovercrafts.
* {{Animesque}}: Characters will occasionally make anime-derived facial expressions.
* ArtEvolution: The art style and quality has varied considerably over the years.
* AuthorAvatar: Nicholas, as you may have guessed, was originally a fictional version of Walstrom. Exactly how much they still resemble each other is unknown.
%%* BigBad: Piggly Oink.
* BlackComedy: You won't have to search too hard to find a death-related gag.
* CloudCuckooland: Pretty much everyone in the ''Enthalpy'' universe is a total weirdo.
* FluffyTheTerrible: Piggly Oink. He's a short pig thing and his name's Piggly Oink.
* FreeRangeChildren: The protagonists are all around eleven years old.
* IdiosyncraticEpisodeNaming: The titles of every comic storyline and episode are structured as "[Primary title]; Or, [secondary title]", with the primary title being the name of a B-Movie.
%%* KidHero
%%* LimitedWardrobe
* MeaningfulName: Udesky was first introduced in a dinosaur-related comic and is named after a character from ''Film/JurassicParkIII''.
* OnlySaneMan: Nicholas is usually the only one to think rationally, though even he has his moments.
%%* ReferenceOverdosed

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!!The cartoons provide examples of:

* AlienInvasion: The reason the characters have to put on an edutainment play in ''The Consequences of Alexander's Death''.
* AuthorAppeal: The creator [[http://naveryw.deviantart.com/journal/37591734/ really likes use of burgers in fiction]].
%%* BottleEpisode: ''Of the Couch''.
* DissonantSerenity: Charles seems to love [=McDarnold's=] despite the restaurant's toxic food and horrible customer service.
* EpicFail: The narration in ''FAIL!: Of the Couch'' insists the original ''Of the Couch'' video is full of these.
* FictionalCounterpart: [=McDarnold's=], of... well, take a guess.
* GenericGraffiti: On the [=McDarnold's=] building.
* IfYouDieICallYourStuff: Charles' doctor asks him if he can have his Xbox after his fiery death, though it's actually an ComicBook/XMen lunchbox.
* MasochistsMeal: Several people have died from eating [=McDarnold's=] food.
* NoodleImplements: Nicholas discovers that a [=McDarnold's=] burger contains rat feces, rat poison, a dead rat, and "not phosphorous".
* TheOtherDarrin: Udesky was voiced by Nik Goodrich in "TRANSMOGRIFIERS", but Walstrom lost contact with him and he'll be replaced by Emily "Pirka" Bricker in the main series.
* {{Parody}}:
** Transmogrifiers are like Transformers, but made out of modelling clay.
** ''FAIL!'' is a parody of Disney Channel's commercial-break show ''BLAM!'', which is really just as stupid and pointless as ''FAIL!'' is.
* ShowWithinAShow: ''The Ramon Osborn Show''.
* StockFootage: "Charles Simplifies His Life With Windows 7" uses blatantly obvious reused footage from "Of The Couch", parodying the ''WesternAnimation/FamilyGuy'' Windows 7 ads that pulled the same trick.
* ThickLineAnimation: Varies.
* TooDumbToLive: Despite all of the horrid and dangerous things contained in the burger, Charles still eats it.
* TotallyRadical: ''FAIL!: Of the Couch''.
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!!The comics provide examples of:

* AmbiguousGender: So far it is unclear whether Pat Weldon is male or female.
** Female is the more likely assumption, since the character's name is derived from the female lead in ''Film/{{Them}}'': Dr. Pat Medford, played by Joan Weldon.
* BigNo: Twice in ''The Invasion of Piggly Oink''. Once as a [[LukeIAmYourFather Star Wars reference]].
* BreadEggsMilkSquick: "If you would like to order a giANT, press 1. For other products, press 2. If you've discovered the horrible truth behind giANTS and wish to protest, press 3."
* BuffySpeak: Many machines in the Dunlap Pig Industries building are labeled "____Y THINGY".
* BigCreepyCrawlies: giANTs.
* EvilKnockoff: Nicholas' clone.
* GratuitousJapanese: At least one of the comics from 2001 included a group of American characters exclaiming "Yana kanji".
* ImpostorExposingTest: Involving a dog, a doughnut, and the Pillsbury Doughboy.
* KillAndReplace: This seems to be Piggly Oink's plan in ''The Invasion of Piggly Oink''.
* PetMonstrosity: giANTs.

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!!The games provide examples of:

* AntiClimax: Every single game on the site so far has an anticlimactic ending.
** [[LampshadeHanging Lampshaded]] in one of ''Nicholas' Weird Adventure 2'''s useless tips.
* EvilSorcerer: Morth
* GainaxEnding: ''Nicholas' Weird Adventure 2'' ends with Nicholas falling to earth and landing on top of a dog, which sinks into the ground, taking Nicholas with it.
* GuideDangIt: To get to the secret room in ''Nicholas' Weird Adventure 2'', you have to press space on a seemingly insignificant picture several times, then use the paper shredder in a completely different area much later in the game.
* ShoutOut: The giant man-eating plant in the plant shop is clearly supposed to be Audrey II, of Theatre/LittleShopOfHorrors.
** The Maromi doll is a central character in ''Anime/ParanoiaAgent''.
** The otaku character has a P! shirt, referencing ''Anime/{{FLCL}}''. The same character requests [[Anime/MyNeighborTotoro Totoro]] {{doujinshi}} and wishes for a DVD set of Anime/GhostInTheShellStandAloneComplex.
** The giant whale in ''Nicholas' Weird Adventure 2'' is named "[[VideoGame/TheLegendOfZeldaOcarinaOfTime Lord Shamu-Shamu]]".
** ''Udesky Answers the Door'' features a [[Series/{{Ultraman}} miloganda]].
* UnwinnableByDesign: Activenture, the arcade game in Morth's castle, at least until you activate easy mode.

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