[[quoteright:300:http://static.tvtropes.org/pmwiki/pub/images/CitwTeaserSmall_243.jpg]]
[[caption-width-right:300:That's one complicated Rubik's Cube.]]

->''"On another level it's a serious critique of what we love and what we don't about horror movies. I love being scared. I love that mixture of thrill, of horror, that objectification/identification thing of wanting definitely for the people to be alright but at the same time hoping they'll go somewhere dark and face something awful. The things that I don't like are kids acting like idiots, the devolution of the horror movie into TorturePorn and into a long series of sadistic comeuppances. Drew and I both felt that the pendulum had swung a little too far in that direction."''
-->-- '''Creator/JossWhedon'''

->''"We are not who we are."''
-->-- '''Marty'''

Five friends go to an isolated cabin in the woods for a weekend vacation. ''[[WhatCouldPossiblyGoWrong What could possibly go wrong?]]''

''The Cabin in the Woods'' is a 2012 horror movie that sets itself apart from ''other'' horror movies by virtue of its co-writers[[note]]Creator/JossWhedon and Drew Goddard (''{{Film/Cloverfield}}''), who also directed this film[[/note]] and by deconstructing both the "cabin in the woods" setting and the horror genre. The film stars ChrisHemsworth, Fran Kranz, Kristen Connolly, [[PowerRangersJungleFury Anna]] [[{{Underbelly}} Hutchison]], Jesse Williams, Creator/AmyAcker, Richard Jenkins and Bradley Whitford. There's also a [[Literature/TheCabinInTheWoods book adaptation]]. In 2013, Ride/UniversalStudios Orlando's ''Theatre/HalloweenHorrorNights'' event will feature a haunted attraction based on the film.

Feel free to watch the [[http://www.youtube.com/watch?v=NsIilFNNmkY trailer]], but know that it [[TrailersAlwaysSpoil spoils]] the film a bit.

Speaking of spoilers, discussing tropes found within this work '''will spoil damn near the entire film.''' To put this in perspective, the DVD box blurb only describes the plot to the extent of "bad things happening" when the five teenagers go to the cabin, ''and nothing else''.

'''Seriously. Watch the movie first, ''then'' come back. This cannot be repeated enough.'''
----
!! This film provides examples of the following tropes:

* AllMenArePerverts: When Jules and Curt go off to fool around in the forest, [[spoiler:the control room is packed to capacity with male staffers, all of whom are eager to see some action]]. They only leave (with plenty of Awwws of disappointment) when Hadley shoos them out of the room.
** And when Lin has to increase the drug dosage.
-->'''Lin:''' Do we pipe it in, or do you want to do it orally?
-->'''Sitterson:''' Say that again, [[ArousedByTheirVoice only slower]].
-->'''Lin:''' You're a pig.
** Averted with Holden (see EatingTheEyeCandy).
* AlmostKiss: Well Holden and Dana do kiss, but as they're going in for a second go Marty walks past and [[SomethingElseAlsoRises notes his "husband bulge"]].
* AmericaSavesTheDay: A decidedly grim version. [[spoiler: All of the other scenarios fail, even in Japan - earlier stated to have a 100% success rate. It's down to the success of the American scenario to save the day! ... And ultimately subverted when Marty and Dana survive to the end.]]
* AncientConspiracy: Implied in the TitleSequence -- this has been going on for a ''long'' time.
* AnyoneCanDie: [[spoiler:...and everyone does. No, literally, '''''EVERYONE''''']]. In addition to the usual expected horror movie deaths, [[spoiler: this trope is also openly invoked as a plot point.]]
* ApocalypseHow: Presumed [[spoiler: Class X with the Ancient Ones destroying the planet after the ritual has failed.]]
* ApocalypticLog: Patience's diary.
* [[ArtifactOfDoom Arsenal Of Doom]]: The cabin basement. Though we eventually settle on the tried and true [[spoiler:TomeOfEldritchLore]].
* AssholeVictim: [[spoiler: The staffers.]]
* AttackOfTheKillerWhatever: See MonsterMash for more details.
* AudienceSurrogate: Truman, the new recruit on the team of the controllers who has to have most of the concepts explained to him.
* AwesomeButImpractical: [[spoiler: Matthew Buckner's BearTrap-and-chain. It's plenty menacing and a decent snare, but it ''repeatedly'' fails to cause major injury to its victims, to the frustration of all killing and torture goals.]]
* BadGuysDoTheDirtyWork: [[spoiler: Dana presses the button "System Purge", and the guys intent on killing them are slaughtered by various monsters.]]
* BarrierBustingBlow: One of the zombies pulls [[spoiler:Marty]] through a window. Later on, [[spoiler:a giant Vampire Bat smashes an agency employee into and through a wall, giving Marty and Dana an escape route.]]
* BeCarefulWhatYouWishFor: [[spoiler: Hadley finally gets to see his Merman. And then it eats him. He curses his ironic luck before he dies.]]
* BeehiveBarrier: [[spoiler:It surrounds the site. And it doesn't just deflect contact, it ''electrocutes'' whatever touches it]].
* BetterToDieThanBeKilled: [[spoiler:One of the controllers does it during the carnage. Maybe. She might be under the control of something.]]
* BigBad: [[spoiler:The Director]] is initially presented at this, then turns out to be NecessarilyEvil due to...
* BiggerBad: [[spoiler: The Ancient Ones.]]
* BigDamnHeroes: [[spoiler: Marty when he saves Dana from being killed by Matthew Buckner.]]
* BigRedButton: One of these [[spoiler: releases all of the monsters kept in containment]].
* BlackComedy: Boy howdy.
* BloodyHilarious
* BolivianArmyEnding
* BreakTheCutie: Dana. [[JossWhedon As to]] [[SignatureStyle be expected]].
* BrickJoke:
** [[spoiler: Possible when an employee places a bet early on. "I don't think we have one of those." "Zoology says we do." Later on, a unicorn appears.]]
** [[spoiler: The merman.]] "Oh, come ''on''..."
** Also, [[spoiler: each and every single monster on the board (except [[NothingIsScarier Kevin]] and "Sexy Witches") is released and seen during the final act. Yes, including the Angry Molesting Tree.]]
** The intern splits the pot with Maintenance.
** "You know... [[spoiler: I don't even think Curt ''has'' a cousin"]].
** Patience lives up to her name [[spoiler: in the end.]]
* BuffySpeak:
** In the credits, even. "Japanese Floaty Girl."
* TheCassandra: Nobody pays attention to Marty's warnings, because he's always smoking pot. [[spoiler: It's actually his pot - coupled with the Chem Department's failure to treat his current stash with intelligence-reducing drugs - that negates the effect of the chemicals the NebulousEvilOrganization is pumping in to alter their behaviour, so that he's the only one able to notice that things aren't as they should be.]]
-->'''Marty:''' I've ''seen'' Curt drunk! Jules too!
-->'''Dana:''' Well, maybe it's something ''else''... ''*Glances at the joint Marty's holding*''
** Also Mordecai and his unnoticed warnings - pay careful attention to his phone conversation with the Controllers. He is the Harbinger for them as well, but they laugh him off, even more oblivious to his dire warnings than the kids are!
* CastingGag: This is the third time Creator/AmyAcker [[Series/{{Angel}} has played]] [[Series/{{Dollhouse}} a scientist]] in a Joss Whedon production.
* CellPhonesAreUseless: The mandatory no-cell-phone-reception premise.
* ChanceActivation: Exaggerated, with the objects in the cellar. As it happens, Dana reads aloud from the diary first...
* ClosedCircle: The titular cabin. [[spoiler:The controllers try very hard to ''keep it'' closed, especially when the tunnel back to civilization fails to [[BrokenBridge conveniently blow up.]]]]
* ClusterFBomb: Sitterson's response to the Japan iteration. Made even more delightful in that it is targeted at a group of 9-year-olds.
* CollapsingLair: At the end.
* CreepyBasement: Two of them [[EldritchLocation in the same small cabin]] -- the SchmuckBait room and the Black Room. And that's not including what's under the ElaborateUndergroundBase.
* CreepyGasStationAttendant: Mordecai. [[spoiler: In this case he's not just set dressing, it's important that the sacrifices choose to continue to the Cabin of their own free will, despite the creepy old guy warning them that "gettin' back is your concern." He also provides the same service to the men running the secret program, and just like the college students, they ignore his warning and doom themselves.]]
* CrouchingMoronHiddenBadass: Marty.
* CruelAndUnusualDeath: ''All of them.''
* TheCuckooLanderWasRight: Marty [[spoiler: was surprisingly on the money about a lot of things even before they started to go to hell. Apparently, his pot has made him mostly immune to the controller's attempts to control him]]
* CulturalTranslation: InUniverse; the Kyoto scenario invokes J-Horror tropes rather than American HorrorTropes. [[spoiler:It's stated by the Director that all other locations also use specific local iterations of said horror tropes.]]
* CuriosityKilledTheCast: [[spoiler:The controllers' job is to lead them to the cellar [[ClosedCircle (and keep them contained in the staging site)]]. But once the cellar is open, its various artifacts exposed to the group's curiosity, the controllers can't do anything. It's up to the teens themselves to actually pick one. Of course, they ''all'' find something that interests them personally, and it was just a matter of who would activate their artifact first.]]
* DangerTakesABackseat: That zombie in the camper.
* DeadlyRoadTrip: Like many other tropes, deconstructed. The evil agency practically ''[[IndustrializedEvil manufactures]]'' these.
* DeadpanSnarker: Marty, presumably for being stoned for most of the movie. Sitterson and Hadley also have their moments.
* DeathByIrony:
** [[spoiler:Steve, the control room honcho who gripes a few times about never getting to see mermen kill the co-eds is himself killed by a merman. [[LampshadeHanging He even says]], "Oh, come ''on''!" when he realizes it.]]
** [[spoiler:The workers in the organization that manipulates the sacrifices and controls the monsters all die horrible deaths when they finally lose control of the monsters. It's ironic in that they manipulated the sacrifice that was the Virgin ("purest") to the point she no longer ''cared'' about their lives.]]
* DeathBySex: [[PlayingWithATrope Invoked, lampshaded, discussed, and justified]], not all in that order.
* DecapitationPresentation: Dana refuses to leave without Jules. Matthew Buckner obligingly tosses her head into Dana's arms.
* DeconstructiveParody
* DeconstructorFleet: Of horror films.
* DecoyProtagonist: [[spoiler: While Dana's status as the FinalGirl is enforced by the movie itself, she spends most of the movie either completely oblivious to the events going on around her or having a mental breakdown, while it's Marty who throws the film OffTheRails, succeeds in (sort of) foiling the evil organization, and generally plays a more traditional hero.]]
* TheDeterminator: Curt. He goes from sensible, level-headed guy to headstrong savior [[spoiler:to grease spot at the bottom of the canyon]].
* DevelopingDoomedCharacters: Played with in that [[spoiler:it exists primarily to show how the controllers change them to fit their assigned roles, even when others in the group would naturally fit those roles.]]
* DevilButNoGod: [[spoiler:The Ancient Ones are seemingly the only divine beings of any consequence and they will go on an apocalyptic rampage the moment they fail to receive their full annual tribute.]]
* DisproportionateRetribution: The "transgressions" which supposedly justify the TargetedHumanSacrifice dying in painful and terrifying ways. One can't help thinking it's more the [[WhoWantsToLiveForever Ancient Ones envy]] those who are [[YouthIsWastedOnTheDumb young, beautiful and carefree]].
* DissonantSerenity: Fornicus, Lord of Bondage and Pain, watches calmly from his cell as a [[HeroicBSOD hysterical Dana bangs her bloody hands on the glass]].
* DontGoInTheWoods: Invoked with the Harbinger.
* DownerEnding: [[spoiler: The world ends. You don't get much further down than that.]]
* DrivenToSuicide: [[spoiler: During the "Code Black," we briefly see one of the controllers shooting herself in the head when she realizes the monsters are coming for her.]]
** [[spoiler: It could be inferred that one of the monsters made her do it. Perhaps by ghostly possession.]]
* DumbBlonde: Yet another InvokedTrope. [[spoiler:Jules is neither naturally blonde nor dumb (she's pre-med), but her hair dye has been treated with a slow-acting toxin that retards cognitive ability.]]
* DwindlingParty: They started out as a group of five.
* EatingTheEyeCandy: On finding a one-way mirror, Holden wrestles over whether to tell Dana, who is undressing on the other side of it. He decides to do the gentlemanly thing and they agree to switch rooms. The first thing she sees on the other side of the mirror is Holden [[ShirtlessScene taking off his shirt]], which she clearly appreciates. When he starts unbuckling his pants though, she covers the mirror.
* EldritchAbomination: [[spoiler:The Ancient Ones, a bunch of sadistic god-like beings who want the humans being sacrificed to die in fascinating, troperiffic ways to be appeased. Just like a horror-viewer. Fittingly, they're human-shaped]].
* EmpathicEnvironment: Invoked when Hadley and Sitterson fine-tune the weather to encourage Curt and Jules to fool around.
* EnforcedTrope: [[spoiler: This is most of the plot.]]
* {{Ensembles}}: While the five teens are not [[FiveTokenBand ethnic]] or [[FiveManBand team-like]] enough for other tropes, they are made to fit five archetypes: [[TokenWholesome The Virgin]], [[PluckyComicRelief The Fool]], [[JerkJock The Athlete]], [[MsFanservice The Whore]] and [[TheSmartGuy The Scholar]].
* EpicFail: We know early on/from the trailers that there's an invisible grid blocking off the cabin area. Curt does not. [[spoiler: Curt jumps his dirtbike right into it, it STOPS him mid-jump and he falls down to the bottom of the canyon.]]
* EverybodyLives: [[spoiler:The Japanese scenario. At least until the failure of the US branch leads to the end of the world...]]
* EvilIsOneBigHappyFamily: It's notable that the monsters [[spoiler:somehow manage to share the bevy of fresh victims they're presented without so much as a hint of conflict between them]].
** So much so that a gigantic bat thing blatantly ignores a helpless person right in front of it because a CreepyChild has him in its sights.
** To a more literal extent, the Buckners.
* EvilOnlyHasToWinOnce: [[spoiler: [[ZigzaggingTrope Zig-zagged hard.]] There are sites all around the world to provide sacrifices, and every year at least one has to succeed. But if the Ancient Ones aren't placated properly just once, that's all she wrote. So good (in the form of NecessaryEvil) only has to win once each year, but they only have to lose completely once to doom the world.]]
* {{Expy}}:
** Fornicus, Lord of Bondage and Pain, is an obvious riff on [[Franchise/{{Hellraiser}} Pinhead]], with his puzzlebox, bondage outfit, and head full of sharp objects.
** The [[spoiler:MonsterClown]] that appears near the end is based either on [[spoiler:[[Literature/{{It}} Pennywise]]]] or [[spoiler:KillerKlownsFromOuterSpace]].
** The list is almost too long to list (also see ShoutOut below). We have [[spoiler:the molesting tree from ''Franchise/EvilDead'', Alma from ''VideoGame/FirstEncounterAssaultRecon'', the Boomer and others from ''VideoGame/Left4Dead'', and even the Nurses from ''Franchise/SilentHill'']]. A lot of video game references in there.
* FacelessGoons: "Internal Security"
* FaceRevealingTurn: The ballerina girl/"Sugarplum Fairy". [[spoiler: Though it would be generous to call it a "face".]]
* FaceDeathWithDignity: Dana and Marty smoke a joint together as [[spoiler: the evil gods start to destroy the world.]]
* TheFamilyThatSlaysTogether: The Buckners.
* FinalGirl: [[spoiler:''Enforced.'' Dana (the virgin) is allowed to live as long as she is the last one standing. Even when she and Marty have broken into the controller base, the guards are ordered to kill the virgin last. She's not actually a virgin, but the villains "work with what they've got."]]
** [[spoiler:Lampshaded by Hadley, who admires how it's so effective.]]
-->[[spoiler:'''Hadley''': It's so strange, I'm...rooting for this girl. She's got so much heart, when you think of all the pain...]]
** [[spoiler: Ultimately averted. Dana and Marty both live to the end - and she is the one closer to death, having just been mauled by a werewolf.]]
%%Do not add FiveManBand
%%%% Well according to the Director there have to be at least five victims, all fitting a particular character type. Clearly some trope is being invoked.
* {{Foreshadowing}}:
** Marty's comment about how [[spoiler:society ''should'' crumble, but we're all too afraid to let it, foreshadows the end.]]
** Lampshaded with Mordecai, "the harbinger," whose job it is to let the co-eds know that they're going into danger. In the process, he calls Jules a whore, [[spoiler:referring to her part in the ritual]] and later mentions to the controllers how [[spoiler: Marty came close to ruining the whole setup by "nearly derailing the invocation with his insolence".]]
** The opening credits have unmistakable illustrations of HumanSacrifice.
** The creepy painting in the cabin shows five people in a wood, presumably the Buckners (note the missing left arm of one of the hunters in the painting), tearing a lamb to pieces as a mysterious figure in the background watches [[spoiler: referencing the Ancient Ones watching as hunters savagely kill the sacrifice--lambs often being thought of as the go-to sacrifice.]]
** [[spoiler: The Ancient Ones make the facility tremble when the Fool "dies". The controllers think that they’re just getting excited, but they’re probably pissed off that the sacrifice is going wrong and the controllers haven’t noticed.]]
* TheFool: Marty is called this by many, but he surprisingly fits into the Tarot archetype beyond just being a hippie stoner — he manages to succeed where others fail, by pure luck but also by being sensible.
* FreezeFrameBonus: Multiple, all overlapping. The myriad artifacts the cast finds in the basement, the board at the beginning showing [[spoiler: the various and sundry ways the characters could [[Film/{{Ghostbusters}} choose the form of the destroyer]]]], then the MonsterMash cameos during "The Carnage".
* FriendshipMoment: When creepy station attendant Mordecai snaps angrily at Jules, Marty steps in to snark right back at him.
-->'''Mordecai:''' "You sassin' me, boy?"
-->'''Marty:''' "You were rude to my friend."
* FunnyBackgroundEvent: Of the horror or dark comedy variety.
** During the celebration, we continually see [[spoiler: Dana]] getting brutally savaged in the background, while the operators are practically oblivious to it.
** When the monsters attack, one of the screens shows the intern frantically holding up signs to the camera, trying to deliver a message to the control room.
* GenreBlindness: [[spoiler:Invoked in-universe on the young people. The soldiers that got killed by the monsters just after Dana pushed the BigRedButton could also count.]]
* GenreSavvy:
** The whole movie can be seen as a subversion of the concept, as the main characters often exhibit GenreSavvy but every time they do so [[spoiler: the controllers sabotage them so that the sacrifice can proceed according to plan]].
** More conventionally, Marty is the only truly Genre Savvy member of the group, [[spoiler:because the drugs that were supposed to make sure he wouldn't be were neutralized by his heavy marijuana use]].
* GodzillaThreshold: [[spoiler: Marty and Dana reach it when they are cornered by the security team. They respond by releasing things almost as bad as the TropeNamer.]]
* {{Gorn}}: And loads of it.
* GoryDiscretionShot: Rather severely averted for the first wave of "The Carnage", then played surprisingly straight for wave two.
** [[spoiler:And cunningly used to obscure Marty's failure to die after being {{Ankle Drag}}ged off by one of the Buckners.]]
* GunsAreWorthless: The security people in the complex have guns, but it doesn't do them much good. [[spoiler: Justified in that many of the supernatural monsters like the clown or wraith are ImmuneToBullets , but you'd expect them to be somewhat effective against things like the giant snake or the many zombies. Also Marty is able to shoot one zombie like creature (possibly the "mutant" mentioned on the whiteboard) and latter shoots a werewolf, but instead of killing it this just causes the werewolf to run off yelping.]]
* HauntedHouseHistorian: The CreepyGasStationAttendant is quite knowledgeable about location and history of the cabin.
* HearingVoices: Marty hears them; implied to be a CompellingVoice, as [[IdiotBall despite his warnings people do what the voices say]] (reading the incantation, and going for a walk alone in the woods).
-->'''Whispering Voice:''' ''I'm gonna go for a walk...''
-->'''Marty:''' What are you saying? What do you want? You think I'm a puppet, huh? You think I'm going to do a little puppet dance? I'm the boss of my own brain so give it up! [[HypocriticalHumor I'm going to go for a walk]].
* HeCleansUpNicely: Although [[spoiler: Marty is covered in blood and grime after saving Dana, he is noticeably without his layers of clothing, showing off a much better physique than hinted at beforehand, as he goes from comic relief to hero.]]
* {{Hellevator}}: The elevator of horror.
* HelpingHands: The zombie arm, which is what remains [[spoiler:from Marty's dismemberment of Judah.]]
* HeroicBSOD: [[spoiler: Dana is rendered borderline catatonic after watching most of her friends being murdered and being swung around by the largest zombie. But snaps out of it to push the BigRedButton...]]
* HeroOfAnotherStory: The Japanese girls.
* HeWhoFightsMonsters: The controllers are just doing what they feel is necessary, but a lot of them enjoy their work a little too much. [[spoiler:Not unlike the gods they're trying to appease.]]
* HillbillyHorrors: "They may be zombified pain-worshipping backwoods idiots ..." "But they're ''our'' zombified pain-worshipping backwoods idiots."
* HoistByHisOwnPetard: The controllers [[spoiler:are set upon and killed by the various horrors they've sealed away to release on the subjects.]]
* HollywoodDarkness: Lampshaded, used and even weaponized.
* HollywoodHealing: Holden recovers from his [[spoiler: bear trap wound]] rather quickly. [[spoiler: Not that it does him much good in the end.]]
* HopeSpot: On the villain side. [[spoiler:Sitterson has just watched his colleagues get killed by monsters, but the escape hatch is open and he makes it out... right in time for a trowel to the gut by the very people he's been trying to kill.]]
* HotterAndSexier: The betting board for the betting pool has "witches" and "sexy witches." Though you never get to see either.
* HumanSacrifice: [[spoiler: Necessary to appease the Ancient Ones, though they don't just want deaths, but suffering as well]].
* HumanShield: An unintentional one when a {{mook}} can't shoot Marty as the FinalGirl [[SecurityCling is in the way]], and she has to die last.
* HypnoTrinket: Presumably, [[spoiler:the necklace that Jules almost put on before being interrupted by Dana in the cellar. In fact, all the trinkets seem to have hypnotic lure to the people interested in them.]]
* IdiotBall: Another InvokedTrope.
* ImpaledPalm: Jules introduction to the Buckners. And let the slaughter commence!
* INeedAFreakingDrink: When the scientists start cracking open beers, Lin says that while Hadley and Sitterson are celebrating, she is drinking.
* ImmuneToBullets: The [[spoiler:killer clown]], as evidenced by it appearing [[GigglingVillain ticklish to gunshots]] as it closes on its victim. Though several other monsters are shown to shrug off bullets, but without as much emphasis.
* ImpaledWithExtremePrejudice: The [[spoiler: unicorn impales a scientist on its horn]].
* ImprobableWeaponUser: [[spoiler: Matthew Buckner's weapon of choice is a bear trap attached to a length of chain.]]
** Subverted. [[spoiler: The weapon is intended to be scary and painful, but if the victim fights off the initial shock, it does little real harm on its own.]]
* ImprovisedWeapon: Marty's bong.
* IndustrializedEvil: The controllers have done this so long, they're completely desensitized to it and run a betting pool for fun. What's more, they've basically turned ritualistic murder into a factory assembly job.
* InfantImmortality: We see a classroom of Japanese schoolgirls (all age nine) being terrorized by an angry spirit. Later, they are seen subduing the ghost with a ritual song. We are then told that there were ''zero'' fatalities. [[spoiler:Later, the end implies that they're doomed anyway as is the rest of humanity.]]
* IronicEcho: [[RuleOfThree Three times...]] by Curt, [[spoiler:Dana, and Sitterson]].
-->'''''Curt:''' [[spoiler: "Let's get this party started!"]]''
* {{Irony}}: Of the dramatic variety. [[spoiler: We are conditioned to think of the people as sacrifices because they are referred to as such. But in actuality, they are the heroes and heroines of their respective stories. The irony, then, is that the world is ended by ancient horrors because this time around Humanity managed to score a win against the forces of darkness. Is anyone aware of another example where winning every battle costs you the war?]]
** ActorAllusion combo bonus: [[spoiler:Sigourney Weaver]] explains the FinalGirl.
* JerkJock: Subverted by Curtis, who is pushed into this role via pheromone manipulation. Up to that point, he was shown to be a LovableJock, and an intelligent sociology major who never acts like an alpha male douchebag.
* JumpScare: One happens when the title appears. Lessened by the pop music that occurs afterwards.
* JustAFleshWound: Several characters are beaten and stabbed yet manage to run and dart around just fine afterwards.
* JustDesserts: [[spoiler:The fate of several Organization members during the rampage, most notably an employee tossed into the maw of the giant cobra and Hadley at the teeth of his merman]]
* KarmicDeath:
** [[spoiler: Hadley finally gets to see what a merman looks like. Emphasis on finally.]]
** [[spoiler: The deaths of almost everyone in the control complex are generally more sadistic and ''far'' more on-screen graphic than what happens to the five at the cabin.]]
** [[spoiler: Sitterson dies by the hand of one of the people he was trying to kill.]]
** [[spoiler: A few of the cabin mates also die in accordance with their sacrificial roles: Jules the whore was attacked during sex, Curt the jock dies during a not so death defying stunt, and if Marty had died when the audience expected him to he would have been ambushed making jokes. Played with though in that they are being pushed into these roles.]]
* KillAllHumans: [[spoiler:Once the monsters are released, they clearly don't want to fight each other, only kill normal humans, be the Facility workers or Marty and Dana.]]
* KilledOffscreen: Subverted. The stoner Marty is wounded and dragged offscreen by one of the Buckners to be killed, and the Controllers assume he died a gruesome death. It turns out that they ''really'' should have made sure, because during that time he [[spoiler:dispatched the zombie, found an entrance to the Organization's HQ, and went back to save Dana from Pa Buckner.]] No offscreen inertia here, folks.
* KillEmAll: [[spoiler: No, not just everyone in the movie. [[TheEndOfTheWorldAsWeKnowIt EVE-RY-ONE]].]]
* KillerGameMaster: Hadley and Sitterson have this trope ''as their profession''.
* TheLastOfTheseIsNotLikeTheOthers: Werewolves, robots, ghosts, zombies, giant snakes..... and a bloodthirsty unicorn. Interesting subversion, perhaps, in that unicorns were traditonally said to attack and kill anyone who was not a virgin.
* LeaningOnTheFourthWall:
** When Truman objects to [[spoiler:manipulating the teens to have sex in the woods, just so the cameras can capture Jules' nudity, the controllers respond with "[[FanService Gotta keep the customers satisfied]]."]]
** [[spoiler: When The Director mentions "Eight minutes to sunrise" when talking about the Gods destroying the Earth, there are eight minutes left until the lights come up in the movie theater.]]
** When the Doctors are seen about to operate a worker, he screams "Please don't cut", but the camera cuts away.
* LetsSplitUpGang[=/=]NeverSplitTheParty: [[spoiler: When the zombies are attacking everyone in the cabin, Curt says they shouldn't split up under any circumstances. The controllers then release a new gas, causing him to turn around and say they should all split up and go into their own rooms]]. Marty's response to all of this is a confused "''Really?''"
* LovableJock: Curt and Holden. [[spoiler: At first, anyway. The controllers use mind-altering chemicals to turn Curt into a JerkJock, and Holden into a HollywoodNerd to fulfill their roles in the ritual.]]
* MadeOfIron: Dana. The motor home she was in crashes into a lake. Then she gets stabbed, clawed and otherwise beat up by Matthew Buckner, and mauled by a werewolf. She's still together enough to philosophise with Marty at the end.
** She was probably chosen with this in mind since she's supposed to be the FinalGirl.
* MonsterMash:
** The whiteboard has a LongList: [[WolfMan Werewolf]], [[StarfishAliens Alien Beast]], {{Mutants}}, [[OurGhostsAreDifferent Wraiths]], [[EverythingsDeaderWithZombies Zombies]], [[ReptilesAreAbhorrent Reptilius]], [[MonsterClown Clowns]], [[WickedWitch Witches]], [[HotWitch Sexy Witches]], [[OurDemonsAreDifferent Demons, Hell Lord]] (a.k.a. Fornicus, [[ToThePain Lord of Bondage and Pain]]), [[WhenTreesAttack Angry Molesting Tree]], [[AttackOfThe50FootWhatever Giant]] [[ReptilesAreAbhorrent Snake]], [[Franchise/EvilDead Deadites]], {{Mummy}}, [[BloodSplatteredWeddingDress The Bride]], [[ScaryScarecrows The Scarecrow Folk]], [[{{Snowlems}} Snow]][[Film/JackFrost1997 man]], [[BatOutOfHell Doombat]], [[OurVampiresAreDifferent Vampires]], [[AnArmAndALeg Dismemberment]] [[OurGoblinsAreDifferent Goblins]], [[TheFairfolk Sugarplum Fairy]], [[OurMermaidsAreDifferent Merman]], [[Film/ReAnimator The Reanimated]], {{Unicorn}}, [[TheSavageIndian Huron]], [[BigFootSasquatchAndYeti Sasquatch, Yeti]], {{Wendigo}}, [[Film/TheStrangers Dolls]], [[DeadlyDoctor The Doctors]], [[HillbillyHorrors Zombie Redneck Torture Family]], [[AllHallowsEve Jack O'Lantern]], [[OurGiantsAreBigger Giant]], [[CreepyTwins Twins]] and Kevin (who, per WordOfGod, is [[FaceOfAnAngelMindOfADemon a sweet, harmless looking guy who will exsanguinate you in seconds]]...[[SinCity wonder where they got that name]]...).
** Other monsters seemingly not mentioned on the whiteboard, but spotted throughout the film, include a [[GiantSpider man-sized tarantula]], some manner of [[EverythingsSquishierWithCephalopods giant cephalopod]], a [[TortureTechnician medieval torturer]], a [[MechanicalMonster scorpion-like automaton with buzzsaws for stingers]], The Suffocators, a StringyHairedGhostGirl, a dead Film/KingKong-esque {{Kaiju}} seen on a monitor, a CreepyChild whom a guard tries to escape by [[VideoGame/FirstEncounterAssaultRecon dragging himself along the floor]], [[VideoGame/Left4Dead a Boomer, a Hunter, a Witch and a Tank]], and three [[DeepSouth Ku Klux Klan]] members. And finally, there's [[spoiler:[[EldritchAbomination The Ancient Ones]]]].
** There are [[UpToEleven even more monsters]] not glimpsed in the film or named on the whiteboard, but who show up in behind-the-scenes features on the DVD. These include a {{Cyclops}}, the "[[WakingUpAtTheMorgue Man in Transparent Tarp]]", a spook who [[FacialHorror peels his own face away]], someone with a [[EldritchAbomination jellyfish-like head]], a [[CreepyCentipedes giant centipede]], a BlobMonster, a [[AttackOfThe50FootWhatever Giantess]] to go with the whiteboard's Giant, [[{{Hellhound}} vicious dogs]], and a [[OurGnomesAreWeirder killer garden gnome]] played hilariously by an angry-looking little kid. Oh yes, and a FlyingFace which is [[CreatorCameo actually]] the CGI-disembodied head of makeup effects artist David Leroy Anderson. A comment on one of the "making of" features reveals that there were about a ''hundred'' monsters involved, not even counting the hordes of zombies and such (another seventy).
* MoodWhiplash: The movie is exceedingly fond of making hilarious jokes instants before gruesome events, and vice-versa.
* NamesToRunAwayFromReallyFast: [[spoiler: Fornicus, Lord of Bondage and Pain.]]
** [[NamesToRunAwayFrom/{{Titles}} Names To Run Away From: Titles]]: The Director running the covert program releasing the monsters, played by [[spoiler:Sigourney Weaver]].
* NecessarilyEvil: The Controllers and the Director are this, especially the latter (the former have grown desensitized over time). [[spoiler:But as long as their program is successful, the Ancient Ones stay dormant, and the world is saved for a little bit longer.]]
* NegatedMomentOfAwesome: [[spoiler:Curt attempts to jump a canyon in a motorbike in order to get help, but only succeeds in smashing into the forcefield surrounding the cabin.]]
* NestedMouths / LampreyMouth: [[spoiler: The Sugarplum Fairy]]
* NeverTrustATrailer: [[spoiler:It's a DeconstructiveParody of horror films. It's advertised as a straight horror film.]] Ironically, this is one of the few films where it could be argued that this is ''exactly'' the mindset the viewer should have before watching the film.
* NiceJobBreakingItHero: Assuming that Hadley and Sitterson can be called "heroes." [[spoiler: Failing to check up on Marty after he was dragged off-camera resulted in the so-called "Fool" sabotaging the base, rescuing Dana and completely trashing the ritual- resulting in the extinction of the entire human race.]]
* NiceJobFixingItVillain: [[spoiler:Patience Buckner kills the Director just as she was about to slay Marty.]]
* NietzscheWannabe: Marty [[spoiler:and Dana by the end.]]
** [[spoiler:Which also counts as an InUniverse DarknessInducedAudienceApathy (even if in that case they will only be an "audience" to see the previous "audience" wreck the world).]]
* NinjaPirateZombieRobot: [[spoiler:Zombie Redneck Torture Family, among many others.]]
* NothingIsScarier: [[spoiler: One of the things listed on a whiteboard of monsters is simply named "Kevin". We never find out who or what Kevin is, let alone what he/it looks like. It might be a reference to the ''Sin City'' villain]].
** The wolf head mounted on the wall counts, especially when it's ''staring directly at the camera''. You're just waiting for ''something to happen''...[[spoiler: and nothing does.]]
* NoodleIncident:
** [[spoiler: Monitors show the results of failed operations around the world, including a house burning down in Berlin and a giant monster in downtown Buenos Aires. Not much context is provided.]]
** The US branch has a nigh-spotless record marred only by 1998, when the Chemical Department screwed up. No further elaboration is made, giving rise to fan theories that it's a possible TakeThat to a particular horror film released that year. Speculation has arisen that this line is referencing ''Film/TheFaculty'', in which there are the five archetype characters, [[spoiler:but none of them die]]. The alien that was attacking them [[spoiler:is also killed by narcotics]], hence the Chemical Department's failure.
* NoSell: Marty [[spoiler: is immune to the mind-altering chemicals being pumped into the cabin because of his marijuana usage; it turns out that the Chem Department knew about this and treated most of his weed stashes with another batch of psychotropics. Unfortunately for them, they missed the stash that Marty actually brought with him.]]
* NotSoAboveItAll: Lin tries to present herself as distanced from the "clowning" behavior of Sitterson and Hadley, such as their organizing the office betting pool [[spoiler:about which horror scenario the kids will incur]]. But this doesn't fool Hadley, who, after asking whether Truman is placing a bet, simply reaches out wordlessly in Lin's direction. Lin sheepishly stuffs some money and her prediction into his hand.
* OffTheRails: [[spoiler: Marty and Dana leave the boundaries of the intended kill-zone when they enter the underground facility.]]
* OffscreenMomentOfAwesome: [[spoiler:"I had to dismember that guy with a trowel."]]
* OhCrap: [[spoiler: The SWAT team's reaction when they realize the monsters have all been released]]. Then again when [[spoiler:two more SWAT guys end up at the elevator room just in time for the next *Ding!*]].
* OneLastSmoke: [[spoiler: Marty and Dana share one last joint before the world goes to hell in a hand basket]].
* TheOnlyOne: Averted. The obvious one here is the Japan branch's work with the schoolgirls, but considering the dozen of other operations we're given glimpses of, there are quite a few other stories going on in the periphery of this one.
** PlayedStraight in that [[spoiler: All other departments have failed, meaning that only the U.S. agency can save the world.]]
* OnlyAFleshWound: [[spoiler: Marty and Curtis are both stabbed in the back, yet show no effects from their injuries in later scenes. The bear trap weapon also seems to have little effect on anyone except tying them up for a moment.]]
* OnlySaneMan: Marty, who keeps cautioning the group against actions like reading the mysterious Latin. His pot-smoking has made him ProperlyParanoid as well as resistant to the mind-altering chemicals used by the villains- mainly due to a mistake on their part.
* OurZombiesAreDifferent: [[spoiler:In fact, "zombie redneck torture family" and "zombies" are classified as two separate species on the board. The Intern and Maintenance split the pool for the former arriving first, but the regular zombies appear later. To be more specific, regular zombies are the popular zombies; undead which hunger for human flesh. The "zombie redneck torture family" are merely undead sociopaths.]]
-->'''Sitterson:''' [[spoiler: This is 'zombie redneck torture family'. See? They're entirely separate species. Like the difference between an elephant and an elephant seal.]]
* PaintTheTownRed: The aftermath of "The Carnage".
* PantyShot: Dana's introduction in the movie shows her dancing in her room in a T-shirt and panties.
* PassThePopcorn: The entire premise, really.
* PetTheDog: [[SubvertedTrope Subverted]]. [[spoiler:Sitterson and Hadley spend most of the movie manipulating the MainCharacters into meeting their gory ends. When it looks like everyone but Dana has died and their job is done, Hadley starts to comment how he's actually rooting for Dana to survive after all the torment they've put her through, but he doesn't even finish that sentence before breaking out the tequila and declaring it party time. What follows is a big office party with everyone having a good time and congratulating themselves, paying no attention as Dana gets savaged by a zombie in the background.]]
-->'''Hadley:''' [[spoiler: It's so strange... I'm actually rooting for this girl. She- she's got so much heart. Think of all the pain, and the– TEQUILA IS MAH LADY!.]]
** Though considering the heightened look of shame and anguish as he switches gear, could be just a manifestation of the "playing your role" theme.
* PhlebotinumBreakdown: [[spoiler:The first sign that Marty is still alive is when the order to blow the tunnel doesn't come through because he's been fiddling with the wires.]]
** During the Carnage, Hadley calls for DeadlyGas to be released. He's told something scary chewed through the connections.
* PlayingAgainstType[=/=]SquarePegRoundTrope: In-universe. [[spoiler: The forced roles of the victims are dismissed as working with available tools, but Holden ([[HollywoodNerd "The Scholar"]]) and Curt ([[JerkJock "The Athlete"]]) both qualified for the other's archetype better than they did their own, Dana ([[FinalGirl "The Virgin"]]) is pointedly ''not'' a virgin, and was in fact [[TeacherStudentRomance screwing her professor]], Jules ("[[DeathBySex The Whore]]") was the more wholesome of the two girls, and though Marty ("[[TheStoner The Fool]]") really was a [[TheStoner stoner]] and a bit of a nut, it becomes clear that he's a bit cannier than first impressions suggest- clear to everyone except the Chem department, of course. This can make for a fair bit of {{foreshadowing}} as to the eventual failure of the ritual—the technicians couldn't even get the casting right, how were they gonna get everything else right?]]
** Another possible switch around, [[spoiler:beyond the given Dana = The Whore and Holden = The Athlete, is that Jules is The Scholar (pre-med), Marty is The Virgin (implied by the unresolved crush he's had on Jules for years, and giving an interesting second level to the fact that he and Dana were the last two "Virgins" alive), and Curt was The Fool).]]
*** Add to that, [[spoiler: the first thing we see of Curt is him goofing off and acting like a fool.]]
* ThePowerOfFriendship: [[spoiler:Used to defeat the ghost in the Japanese scenario. Now she'll live happily as a frog... at least until the world ends.]]
* PunchClockVillain: Every character responsible for operations (with exception to The Director) have shades of this. Bonus points for Truman, who makes a point of being aware of this. The fact that they're doing it to save the world each year explains why they're otherwise normal people. Only the Director seems to truly get a kick out of it; the others are said to be letting off steam.
* PurpleProse / FailedAttemptAtDrama: Mordecai's phone call. "Cleanse them. Cleanse the world of their ignorance and sin. Bathe them in the crimson of—[[SophisticatedAsHell am I on speakerphone?]]"
* PutTheLaughterInSlaughter: Laughter is heard as the purge starts, presumably from the MonsterClown or Dismemberment Goblins.
* {{Railroading}}: Hadley and Sitterson resort to this with [[spoiler: pheromone mists and remote-control doors]].
* RampJump: The motorbike jump.
* ReallyGetsAround: [[spoiler: Subverted with Jules, who gets pushed into the role of "the whore" by the villains with drugs and pheromones. She recalls an apparent tryst with Marty in their freshman year, but Marty makes it clear that nothing happened.]]
* TheReveal: Several.
** [[spoiler: It becomes clear rather quickly that the events of the cabin are being controlled by the lab of scientists, who are making the scenario play out as a horror scenario should, i.e. everyone dying except the virgin, the characters making stupid decisions, etc., through the use of pheromones that influence their thought processes.]]
** [[spoiler: The lab is actually filled with ''real'' monsters in glass cages, including zombies, giant spiders, evil clowns, demonic spirits, etc. The artifacts in the basement of the cabin each hook in to a different monster, and what monster was released depended on what artifact was selected first.]]
** And then the ultimate reveal: [[spoiler: The whole experiment in the lab is actually to complete an annual ritual created by demonic beings called "The Ancient Ones", who enjoy watching humans suffer. The ritual requires at least five people (and at least one each of: [[JerkJock The Athlete]], [[ReallyGetsAround The Whore]], [[TheSmartGuy The Scholar]], TheFool, and [[TheIngenue The Virgin]]) to die in horrific ways, while saving the virgin for last. If the ritual is not completed, The Ancient Ones will destroy the Earth. There are several labs all across the world, and their sole purpose is to ensure the scenario plays off without a hitch (see the first reveal), which is why horror characters always make such bad decisions. As it turns out, the entire fate of the world depends on it!]]
* RiseFromYourGrave: The undead Buckner family when Dana inadvertently summons them, and [[spoiler:the Ancient Ones at the end of the movie when a huge hand smashes through the eponymous cabin and comes down on the camera. SmashToBlack.]]
* ScaryScarecrows: [[spoiler:Truman is savaged by a gang of evil scarecrows.]]
* SchmuckBait: The cellar isn't just this, it's ''filled'' with these.
* SealedEvilInACan: PlayedStraight, taken UpToEleven, then [[SubvertedTrope subverted]]. It's made clear early on that [[spoiler: the facility has a stockpile of NightmareFuel. Eventually, it is revealed that their stockpile is a well organized collection of ''every'' type of horror movie monster one can think of, including a few one would ''never'' have expected (e.g. unicorns, mermen, ''trees''[[note]]unless you've seen EvilDead, of course[[/note]]). But it's then revealed that even this encyclopedia of terror is just a part of a [[AlwaysABiggerFish bigger can]] that holds [[EldritchAbomination even bigger evils]]. ]]
* ShoutOut: As a parody of horror movies, the movie has loads of these. Also see {{Expy}} above.
** The ''betting board''. There were a slew of them in that one scene.
** ''Series/{{Angel}}'': The symbol on the floor and the one on the controllers' talismans sure looks like the Circle of the Black Thorn...
** The entire controller's compound is reminiscent of The Initiative from ''Series/BuffyTheVampireSlayer''. [[Recap/BuffyTheVampireSlayerS4E21Primeval Which got wiped out when all the demons escaped from their cells]].
*** Not to mention that the whole facility (as well as what's happening to it) is ''very'' [[VideoGame/HalfLife Black Mesa-ish]].
** ''The Franchise/EvilDead'': College friends, cabin in the woods, evil basement, ominous book with ancient chant, and evil molesting trees. "Deadites" also show up on the betting board. The cabin itself looks almost identical to the one from the Raimi movies.
*** The scene where the basement trapdoor swings open is ''nearly identical'' to the scene from the original ''Evil Dead''. Watch them back-to-back and the recreation is strikingly faithful.
** ''Franchise/{{Hellraiser}}'': The pale guy in black bondage gear, holding a puzzlebox, with sharp metal things embedded in his head.
** ''Film/{{Alien}}'': On a monitor during "The Carnage" you can see the foot of a Xenomorph advance towards a cowering woman, the same way the shot happened in the first ''Alien'' film.
** ''VideoGame/Left4Dead'': A Boomer, a Hunter, a Tank and a Witch are seen among the various monsters, apparently using the in-game models and animations no less.
** The third act is full of shout outs to a bevy of horror films from recent years, among the more generic zombies and GiantSpiders are some doll-masked [[Film/TheStrangers strangers]], a torturer in a mask and leather apron straight from ''Film/{{Hostel}}'' and the scarecrows that tear apart [[spoiler: Truman]] are actually from the 80's B-movie [[Film/{{Scarecrows}} of the same name]], they even get taken out the same way.
** ''Film/{{Carrie|1976}}'': The very end, [[spoiler: with the hand coming out of the ground, might be a reference to the ending of ''Carrie''.]]
** The shifting square containment cells might be a shout out to ''Film/{{Cube}}''.
** On one of the television monitors, we can see a ''Film/KingKong'' expy lying on the ground dead.
** ''Film/TheShining'': The twin girls can be seen when all the containment cells are shown. Later a pair of elevator doors open to reveal a flood of blood.
** ''VideoGame/FirstEncounterAssaultRecon'': A formerly heavily armed SWAT member crawls away from a CreepyChild.
** ''Film/TheStrangers'': some of the villains in the carnage are a group of silent, well-dressed men and women with white porcelain masks. They are later seen dousing some bound technicians with gasoline and lighting them offscreen.
** ''Film/FunnyGames'': The rather jarring title card at the beginning is the same effect (red block letters, sudden sound, quiet conversation leadup) in both films.
** ''VideoGame/SilentHill1: [[spoiler: The Vampire Bat bursting through the plate glass window toward the end is pretty much exactly how the first fight in the first ''Silent Hill'' game begins.]]
** ''ComicBook/SinCity'': The unseen but unspeakably horrible [[http://en.wikipedia.org/wiki/Kevin_%28Sin_City%29 Kevin]].
*** Or this [[http://en.wikipedia.org/wiki/We_Need_To_Talk_About_Kevin Kevin...]]
** Dana and Marty sitting next to each other for OneLastSmoke after accepting their death is straight from ''Film/ShaunOfTheDead''.
** The Scarecrows attacking Truman may have been a reference to [[Recap/DoctorWhoS29E9TheFamilyOfBlood Doctor Who]].
** Jules' dance may strike some viewers as familiar. [[spoiler: It's from the original ''Film/TheWickerMan''.]]
** Truman's name may be a reference to ''Film/TheTrumanShow''.
** The Doctors are highly reminiscent of the Splicers from ''Franchise/BioShock''.
** The amplified female voice attempting to reason with Marty and Dana as they enter the laboratory ([[spoiler:(even if it's merely a distraction]]) recalls the final level of ''VideoGames/{{Portal}}''
** The first kill [[spoiler:in the facility]] goes to [[Film/TheCrawlingHand a crawling hand.]]
** [[Recap/TheXFilesS01E08Ice "We are not who we are."]]
** The original NightOfTheLivingDead famously involved someone getting dismembered with a trowel, by a zombi.
* SideBet: The scientists bet on what horror the protagonists will select.
* SinisterScrapingSound: Matthew Buckner drags his bear-trap-thingy along the wooden dock as he goes to finish off Dana.
* ShirtlessScene: Holden. Dana is impressed.
* ShootTheDog: [[spoiler:Dana comes close to doing this when she strongly considers killing Marty to [[SavingTheWorld prevent]] TheEndOfTheWorldAsWeKnowIt.]]
* SirNotAppearingInThisTrailer: [[spoiler:Sigourney Weaver.]]
* SlashersPreferBlondes: Enforced as [[spoiler: Jules]] dyes her hair blonde just before the trip. The controllers even put toxins and pheromones in the dye to influence her behavior.
* SmartPeopleKnowLatin: Played very deliberately. There is literally nothing to establish Holden as the Smart Guy except that [[NerdGlasses glasses suddenly appear on his face]] in the basement and and he equally suddenly remembers enough high school Latin to decipher the incantation. The only reason he's The Scholar is because the controllers decided he is.
* SoundTrackDissonance: The big office party with cheerful music playing while Dana gets savaged by a zombie in the background.
* SpannerInTheWorks: [[spoiler:Marty, the Fool, had the audacity to survive when he was supposed to die. [[DeconstructedTrope This is not as much of a good thing as it sounds.]]]]
* SpecialPersonNormalName: Obviously Kevin. Also qualifies as TomTheDarkLord
* SpoofAesop: In the commentary, it is mentioned that "Pot saves lives." [[spoiler: Or at least it saves two people long enough to bring about TheEndOfTheWorldAsWeKnowIt.]]
* SpookyPainting: The hunting scene portrayed in Holden's room is kinda.... visceral.
* TheStarsAreGoingOut: Marty steps out for a leak and is surprised he can't see any stars, even though they should be miles from any light pollution source, a possible hint the cabin is in an EldritchLocation. [[spoiler:Given what happens at the end of the movie, the apocalyptic version of this trope also applies.]]
* [[spoiler: StealthParody:]] The film's true nature becomes obvious pretty early on, but you wouldn't guess it from the trailer.
* TheStoner: One of the protagonists. Interestingly, [[spoiler:since the Chem department forgets to tamper with one of his weed stashes, his drug-use makes him immune to the pheromones, making him immune to the enforced genre-blindness.]]
* StringyHairedGhostGirl: What a classroom of Japanese students are shown contending with.
* StupidityInducingAttack: [[spoiler: The scientists spiked Jules's hair dye with toxins to gradually decrease her intelligence.]]
* TakingYouWithMe:
** [[spoiler:Truman blows himself and a bunch of scarecrows up with a grenade. Still doesn't save Hadley, Sitterson and Lin.]]
* TargetedHumanSacrifice: [[spoiler:The sacrifices have to fit certain archetypes for the ritual to work. Amusingly, many of them do have elements of the archetypes required, but not the ones they are manipulated into. For example, Curtis is a smart guy with an in-depth knowledge of Russian philosophy and a full academic scholarship, but he's forced into "the Athlete." Holden, on the other hand, has "the best hands on the team" by Curtis's admission, without any academic merits mentioned, but he's "the Scholar" (just because he can read Latin). Marty notices that Jules's newfound sexuality and Curtis's alpha-male posturing are out of character for them. Jules is only a dyed blonde, and she's only acting 'dumb' because she's under chemical inducements, plus she's in a stable relationship. Dana is surprised at being dubbed "the Virgin," and the beginning of the movie even establishes that she recently had an affair with her professor.]]
* TaxidermyTerror: Beautifully played with. The cabin that the college kids go to has a mounted wolf's head on one of the walls, which creeps them out. In the evening, when they're playing "truth or dare", Jules has to make out with it on her dare. She does so, and then [[spoiler:nothing happens. It was never alive.]]
* ThrowAwayGuns: After Dana stabs a zombie Sitterson pulls a switch, and a charge of static electricity causes her to drop the knife.
* ThoseTwoBadGuys: Hadley and Sitterson.
* TooDumbToLive: [[spoiler:Seriously, what organization in their right mind would have a BIG RED BUTTON that releases ''every single monster at once'', and then puts it in an unguarded, unlocked room? Better yet, why is the process of opening an escape hatch ''more complicated'' than releasing all of the monsters?]]
--> '''Joss (from the commentary)''': Of course it makes sense there's a "System Purge" button. What if they need to purge the system?
** [[spoiler:The irony being that while the teens seem quite genre-savvy (at least at first), the Evil Agency itself is unprepared for anything.]]
* TortureCellar: The Black Room.
* TrailersAlwaysSpoil: Played straight with [[spoiler:Marty's apparent "death"]]. The [[spoiler:double-bluff]] structure of the film averts this trope; the trailers spoil that there's science behind the magic, but not [[spoiler:the magic behind the science]].
** Some characters (be monsters or troops) in the last half are also shown in brief glimpses.
* TrappedInTVLand: Borderline example. It's implied that [[spoiler: the monsters that appear in the last third are inspired by movie monsters.]]
* TrumanShowPlot: Albeit the thing staged is not a reality show, but a slasher movie.
* TurnedAgainstTheirMasters: "The Carnage"
* UnexplainedRecovery: [[spoiler: Marty is stabbed in the back and dragged off-screen by a monster. He shows up later, and except for being rather roughed up by the zombie, he is perfectly fine.]]
* UnusualEuphemism: "Husband bulge".
** A possible reference to Whedon show {{Dollhouse}} in which Topher Brink, also played by Fran Kranz, is uncomfortable with the word "erection" and prefers the term "man reaction".
* VerticalKidnapping: When Holden is in the Black Room, he gets yanked up to the trapdoor by Matthew Buckner's bear-trap thingy.
* VirginSacrifice: The controllers regret that they can no longer just [[AppeaseTheVolcanoGod toss a girl into a volcano]] as a sacrifice, referencing this trope. They now have to go by stock horror film cliches, which ironically often leaves the virgin FinalGirl alive. There's also the problem of [[SubvertedTrope getting an actual virgin]]; they just work with what they can get.
* WellIntentionedExtremist: [[spoiler: The scientists controlling everything are doing so as part of a ritual that prevents the BiggerBad "Ancient Ones" from rising and destroying the world.]]
* WhiteMaskOfDoom: Briefly seen in the [[CreepyBasement basement]], then again on some of the participants in "The Carnage".
* WrestlerInAllOfUs: Curt clotheslines one of the zombies.
* WrongGenreSavvy:
** [[spoiler:The guys behind the scenes have some sort of gas that makes the characters act like this,]] making the jock decide everyone should [[LetsSplitUpGang split up]] and not stay together.
* XMeetsY: Every SlasherMovie ever meets ''[[spoiler:Film/TheTrumanShow]]'' meets ''[[spoiler:VideoGame/HalfLife1]]''.
* YouBastard: [[spoiler:The Ancient Ones are basically horror movie viewers. They watch people die in horrific, troperiffic ways, and, when their world does not go as they wanted it to, want to make it go away. And it's hard to not see the scientists/puppeteers as a metaphor for Hollywood's current horror output, repeating the same formula ad infinitum to appease its target audience's appetite for sex and gore as religiously as any ancient ritual. And you can see the two main scientists as a metaphor for a writer and a director, forced to keep putting out the same dross and lamenting their inability to try anything creative. 'I'll never see a merman,' indeed.]]
** [[spoiler:Hell, the head of the puppeteer's agency is even called 'The Director'. And she's gonna make sure the audience gets what it wants.]]
*** [[spoiler:"Gotta keep the customer satisfied."]]
* YouthIsWastedOnTheDumb: According to the Director, all the victims have to be young and be punished for various transgressions.
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