[[quoteright:300:http://static.tvtropes.org/pmwiki/pub/images/evil-versus-evil_7411.jpg]]
[[caption-width-right:300:[[http://cheezburger.com/5474896896 Is there any way the producers could hope to top this!?]]]]

->'''Alexa''' "'''Lex'''" '''Woods:''' We're in the middle of a war. It's time to pick a side.\\
'''Sebastian de Rosa:''' We are on ''[[TakeAThirdOption our]]'' side!

What would happen if the Franchise/{{Predator}}, interstellar alien hunter extraordinaire, took it upon himself to go after the [[FaceFullOfAlienWingWong face-raping]] [[Franchise/{{Alien}} Aliens?]] Oddly enough, [[TakeAThirdOption lots of humans dying]].

''Alien vs. Predator'' is the [[CrossOver combination of Fox's two hit alien monster movies]], and the stories of the innocent humans caught in the middle. The concept was even hinted at in the second Predator movie, which featured a Xenomorph skull amongst the Predator's trophies. It was made into a movie in 2004, and a sequel, ''Requiem'', was made in 2007. The movies abandoned the futuristic setting of the comics and had the conflict take place on contemporary Earth. The movies weren't exactly embraced (though the first film was ''slightly'' better received by audiences), even by the fanbase. Most people point to ExecutiveMeddling as the cause of the films' failures.

The games, along with a series of comics and novels, are completely unrelated to the story or setting of the movies, and have been rendered non-canon - at least to the ''Alien'' universe - with the release of ''Film/{{Prometheus}}''. To see the tropes for the games and comics, see [[Franchise/AlienVsPredator here]].

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!!Tropes in both films (specific films each follow this section):

* CanonDiscontinuity: ''Film/{{Prometheus}}'' presents a completely different origin for the Weyland-Yutani corporation, making the ''Alien vs. Predator'' series non-canon.
* CorruptCorporateExecutive: Anyone high up in WY ([[CoolOldGuy except the very first original Mr. Weyland]]) is guaranteed to be doing something dangerous, unethical and in all likelihood ''stupid'' involving the nearest Hive and / or ancient ruins. It's apparently true for the whole corporation: Weyland-Yutani's contract has a clause that allows them to feed you to a Xenomorph [[ForScience just to see what happens when they feed you to a Xenomorph.]]
* {{Crossover}}: Self-explanatory.
* DevelopingDoomedCharacters: Both are widely considered badly done examples.
* DVDCommentary: Both AVP movies have them.
* EvenEvilHasStandards: Predators do not kill certain targets such as children and pregnant women. In the first movie there's even a scene where a predator refrains from killing a man because it sees that he is dying of terminal cancer. [[spoiler:Of course, he changes his mind when the human attacks him with a makeshift flamethrower, but even then, he makes the kill quick and clean and didn't take a trophy.]]
* FaceFullOfAlienWingWong: Being a film that includes Aliens, people getting facehugged is inevitable, unlike the four alien films, in which one person is visibly facehugged, the AVP films have the highest count of it with five people facehugged in the first film and four in the second.
* FinalGirl: Everyone but Alexa Woods are killed, leaving her alone with the last remaining aliens and the last predator; ultimately she is left to fight the Queen alongside Scar.
* {{Homage}}: Both films were criticized for being too derivative -- homage taken too far.
* ImmediateSequel: The two films could be spliced together into one pretty easily.
* KillEmAll: The first movie has only ''one'' survivor, [[WhatHappenedToTheMouse who was left in the middle of Antarctica]]. The second movie has only four survivors, which is actually worse given that the movie takes place in a large town and not in the middle of a frozen wasteland.
** The novelization of the first film clears up Lex's fate -- the ship everyone arrived on had a separate crew which stayed behind while everyone went exploring. Presumable Lex was able to contact them once she got back to base camp.
* OhCrap: Even the Predators with all their technology start getting jumpy when the Aliens are creeping about, just to show that they do know how frikkin' dangerous those things are (unlike the moronic corporations of the future who believe they can handle it.)
* RecycledInSpace: In an inversion, the ''Alien Vs. Predator'' movies sees the Aliens on Earth as opposed to [-IN SPACE!-]
* TooDumbToLive: Pretty much everybody, but a few stand out. Adele in the first film takes a little too long to put "sacrifical chamber" and "mysterious eggs emerging besides ancient skeletons" together, and doesn't act fast enough to save herself from the facehugger. Miller manages to kill an attacking facehugger but wastes bullets on the corpse (not that his already limited ammunition would have been much help against an entire ''room'' of facehuggers). In the sequel, Buddy shoots an alien point blank and gets acid on his arm; rather than take off his jacket off, he just stands there letting the acid burn his arm off.
** The statement "I've never seen a gun help anyone out on the ice" would probably be an indicator of someone being too dumb to live if the movie wasn't conspiring to prove the speaker right (because no ''human'' gun winds up being of any use, and the Predators focus mostly on melee weapons in this series).
* VasquezAlwaysDies: Despite the source movie being the TropeNamer, it's somewhat averted in both films. In [=AvP=] the lead is equally as badass as the "Vasquez" clone (who dies first), and in ''Requiem'' she's the lead herself.
* VersusTitle

[[quoteright:203:http://static.tvtropes.org/pmwiki/pub/images/Avpmovie_3419.jpg]]
[[caption-width-right:203:"Whoever Wins, We Lose"]]
!!Tropes in the original ''AVP: Alien vs. Predator'':

* AbusivePrecursors: The ancient humans were basically used as incubation units for the xenomorphs, just so the Predators could practice combat skills.
* AerosolFlamethrower: Charles Bishop Weyland does this as a HeroicSacrifice with a flare and a medicine inhaler. He gets butchered by a Predator hunter [[WorthyOpponent because he had a weapon, trumping the fact that he's a sick old man who the hunter would ignore otherwise.]]
* AncientAstronauts
-->[the team finds the Predators' shoulder cannons]
-->'''Miller:''' Any idea what these are?
-->'''Rosa:''' No, you?
-->'''Miller:''' No.
-->'''Stafford:''' It's a good thing we brought the experts.
-->'''Miller:''' Well, yeah, it is a good thing, cos' this is like finding Moses' DVD collection.
* ArtisticLicenseHistory: Why the Pyramid in the first movie operates on 100 year cycles according to their ''archaeologist''. None of the cultures that are supposedly the influenced by the builders used anything close to that in their counting systems at the time-period given. In fact, given the high Mayan influence, it'd been more accurate to say the Whaling station was lost in 1900 instead of 1904; the Mayans ''did'' use 52 lunar cycles, and 2004 is exactly 2 cycles afterwards. A dead 1952 crew by the pyramid would have made sense. Not to mention that the ''Hunter's Moon'' joke would have been even more ironic.
** Once activated, the pyramid shifts every 10 minutes. The problem is, Mayans did not have a unit of time which corresponds to a minute. In case you are curious, it originates from Babylonia.
* AvengersAssemble: The 2004 film starts off like this.
* {{Badass}}: The "Grid" Alien from the first movie: he [[ImpaledWithExtremePrejudice stealth kills]] a predator as an entry and faces another in one of the franchise's most badass fight scenes. And wins!
** Scar and Lex count as well.
* BadassGrandpa: Charles Weyland stands up to a Predator and, when it tries to leave him after detecting his illness, ''provokes'' it into killing him to give the others time to escape.
* BlackDudeDiesFirst: Averted in the first movie where Lex, one of the few examples of a black female lead in a Sci-fi horror movie, was the only person to survive.
* {{BFS}}: The Predators' iconic wrist-blades are much larger in this movie than in previous iterations. ItMakesSenseInContext as the Predators in prior films were hunting humans, whereas Xenomorphs are a far tougher game, and using larger weapons makes just as much sense as a human hunter using a larger caliber rifle to kill a lion than a deer.
* DefiantToTheEnd: "Don't you turn your back on ''me''!"
* DontYouDarePityMe: Charles Bishop Weyland, a wealthy elderly industrialist, who funds the mission to a newly-discovered pyramid under tons of ice. He later reveals to the protagonist that he's dying of lung cancer and wants leave his mark on the world. Later, as the survivors are running from a Predator, Weyland tries to have a YouShallNotPass moment. The Predator scans him, sees his deformed lungs, and just walks right past the old man. The pissed off Weyland attacks the Predator with a makeshift flamethrower. ''Now'', the Predator won't ignore him and takes him out.
* TheDragon: The "Grid" alien to the Alien Queen. She's by far the most dangerous of the Xenomorphs. Where the rest are killed off by the dozens by a single Predator, Grid kills ''two'' of them by herself. She even manages to evade Scar's Plasma Caster shots when they're aimed right at her, when the rest of the drones were simply mowed down. She's also the one who leads her siblings in freeing the Queen. The novelization even refers to her as "the Alpha-alien", implying she's higher ranked than the other drones.
* EnemyRisingBehind: The Xenomorph who tries to attack the sole Predator left in the pyramid.
* EverybodyWasKungFuFighting: Did that Predator just uppercut that alien?
* FatalFamilyPhoto: During an early scene in the first film, Graeme shows Alexa a picture of his kids. Things do not work out for him. In a variation of this trope, RedShirt Verheiden mentions to Graeme that he has a son...about five minutes before he's snagged by an Alien.
* HeroicSacrifice: Weyland.
* InfraredXRayCamera: This is how WY finds the pyramid in the first film. Also, the Predators can see their plasma casters through people's bags in infrared.
* IronicEcho: Lex gives one to an alien from the entire Predator franchise [[PreMortemOneLiner before]] she [[BoomHeadshot blows a hole in the aliens' head]] ""You're one ugly motherfucker""
* LesserOfTwoEvils: The surviving humans ultimately decide that giving Scar back the plasma caster they'd taken so he can more effectively combat the aliens is their best chance to survive.
* MisplacedWildlife: The first movie, set in [[MysteriousAntarctica Antarctica]], has a CatScare with a penguin. The problem is, the penguin is an ''[[http://en.wikipedia.org/wiki/African_Penguin African]]'' Penguin, which don't live in Antarctica.
* MysteriousAntarctica: The first movie is set there.
* NoSell: In at least one instance a human punches an oncoming Predator, the latter seems at best, mildly annoyed.
* OhCrap: Scar the Predator does this when he sees the Alien queen emerge from the ice.
** The team in the "Sacrificial Chamber" have one when the facehugger eggs rise from the floor, and they realize something very bad is about to happen.
* OutrunTheFireball: Scar and Lex do this from his (detached) wrist-device nuke. Their survival was aided by a mile of ice containing the blast, and the shockwave caught up to them regardless.
* [[CatScare Penguin Scare]]
* RedShirt: A literal example as after being facehugged, Adele is killed by a chestburster emerging from her chest and ripping through her red shirt. Nearly all of the other humans qualify, as many are well-armed yet most die without getting off a shot, and those that do are not saved by it.
* ShoutOut: The sub-plot of a human female displaying enough courage and prowess (namely by killing a couple of Xenomorphs) for a Predator to fight alongside her and blood her as a warrior, with her then killing a Queen alien before the predator dies from his wounds, is all taken from the first Alien vs. Predator comic (and the ''Alien vs Predator: Prey'' novelization), in which exactly this happens between Machiko Noguchi and "Broken Tusk". Unlike Alexa, however, Machiko would go on to live with the Predators and eventually become fully accepted into their ranks (albeit while still facing some bigotry).
* SoleSurvivor: [[spoiler:Alexa. The rest of her team mates are all killed.]]
* SpaceIsNoisy: Surprisingly averted in the first movie. The opening shot in space is completely silent apart from the soundtrack. The only noise heard comes from the scenes inside of the Predator ship.
* StatOVision: A predator decides not to kill [[spoiler:[[NotWorthKilling Weyland because it can see that he's already dying of cancer.]] [[HeroicSacrifice Then Weyland improvises a flamethrower to buy the others more time...]]]]
* TooDumbToLive: One of the Predators have caught Grid in a constricting net and his blood is clearly melting it. The Predator, instead and rushing in and finishing him off, takes a ''slow'' walk towards him, which result Grid jumping him and impaling him when he gets too close.
** All of the Predators really. They were there to hunt Xenomorphs, not humans. Yet they stop to kill the drill-team on the surface (even going so far as stringing them up for skinning) even though they should realize that time is of the essence with curious humans poking around the temple. Had they not taken this senseless detour in their priorities, they could have gotten to the plasma casters before they were taken by the expedition; and the hunt would have likely gone very differently.
* TookALevelInBadass: Lex.
* ZombieInfectee: [[spoiler:Scar is impregnated by a facehugger after his marking ritual, but the next time we seen him, he is shown putting on his mask as if nothing happened, and he spends the rest of the film acting as if he didn't know about the Alien inside of him.]]
** [[FridgeBrilliance Justifed, as Kane from the original Alien only remembers "some horrible dream about smothering,"]] [[ShownTheirWork hinting that being facehugged messes with short-term memory, leaving the event itself a blank.]] A useful trait for a species that breeds by parasitic reproduction with often sapient hosts.
** An alternate interpretation is that Scar likely knew exactly what happened to him (as he would have no doubt done his homework on the prey he was there to hunt); and was simply gambling that he would be able to have the xenomorph removed when his people picked him up. Apparently a scene was planned but never filmed of the mortally wounded Scar stabbing himself with his dagger to kill the xenomorph gestating inside.

[[quoteright:214:http://static.tvtropes.org/pmwiki/pub/images/avpreq_9243.jpg]]
[[caption-width-right:214:"This Christmas There Will Be No Peace On Earth."]]
!!Tropes in ''Aliens vs. Predator: Requiem'':

* AnachronismStew[=/=]ArtisticLicenseMilitary: The AVP wiki stated that AVP-R took place a few days after the original; the U.S. National Guard troops wear ACU uniforms, which weren't issued until 2006.
* ArtisticLicenseGeography: This film is set in Gunnison, Colorado. However, the terrain in the movie is a lot less mountainous than in the real Gunnison, Colorado. Additionally, when the National Guard is summoned from Colorado Springs they arrive almost instantly. In real life, Colorado Springs is 3 hours away from Gunnison.
* AssholeVictim: The JerkJock ends up getting his face melted by the Xenomorph acid, and his friends get mutilated by one.
* AbandonedHospital: The climax of ''Requiem''.
* AbsurdlySpaciousSewer: ''Requiem'' So big the Aliens were setting up a hive down there before the Predator showed up and drove them out.
* BadAss:
** Wolf: [[BadassGrandpa A highly experienced]] Predator with a lot of equally badass weapons. He [[CurbStompBattle curb stomped]] a lot of xenomorphs without breaking a sweat, and manages to put up an equal fight against the Predalien.
** The Predalien too: [[AsskickingEqualsAuthority pack leader]], [[CurbStompBattle wipes out]] an entire predator ship's crew and ties in a fight against the ancient, high-experienced predator Wolf.
* BattleInTheRain: The climax of the movie.
* BigBad: The Predalien takes center stage throughout the movie as the biggest and scariest alien around. It immediately destroys the Predator ship, creates a Xenomorph army to invade the rest of Earth, harvests a whole town. It forces the predators to send [[CleanUpCrew Wolf]] after it, as the only one who could take it down.
* BlindObedience: ''"The government wouldn't lie to us!"''
* BloodierAndGorier: The first film isn't exactly blood-free, but ''Requiem'' really cranks up the {{Gorn}}.
* BullyingTheDragon: Whenever the human characters fuck with the Predator instead of just leaving it the hell alone, it's definitely this. The main character seems to catch the hint during the finale; he chooses to simply leave the Predator alone and sure enough the Predator ignores him.
* BurgerFool: The lead in ''Requiem'' works as a pizza delivery boy. All the other characters go out of their way to tell him how humiliating this is.
* CallBack: [[Film/{{Predator}} "Get to the chopper!"]]
* CanonImmigrant: The [=PredAlien=] goes from a enemy in the PC game to an official sub-species in the second movie. There's also the different vision modes the Predator uses to spot aliens instead of humans in the first movie.
** That in turn was an explanation of the vision modes used in ''Predator 2'', where it found the heat-cloaked humans by switching settings.
* CleanupCrew: Throughout the film, Wolf has been killing as many witnesses as he has Xenomorphs, making it clear what his purpose is in the movie.
* DarkerAndEdgier: As noted under BloodierAndGorier, the body count and visible violence is very much cranked up. But the film also abandons one of the usual concepts of most ''Aliens versus Predator'' ventures (including the first movie): humans and Predators forced to team up to take out a bigger threat. Wolf is instead [[WordOfGod meant to be]] like a "force of nature" that's as much or more of a risk to the human characters as the Xenomorphs, and is an antagonist all the way through; he never even shows the grudging respect for human characters that has also been a trait of ''Predator'' films and the ''[=AvP=]'' properties (very much likely due to his role as a [[OneManArmy one-man]] CleanupCrew). It's also implied that even the few survivors at the end might be "silenced" by the government. Overall the tone is a lot more bleak than the other entries in the ''Predator'' franchise.
* DeathBySex: One of the girls strips down to almost nothing in the pool scene. She does not make it to the end of the movie.
* DramaticThunder: The climactic battle in the hospital.
* DoubleTap: [[ExaggeratedTrope Exaggerated]]. The alien who kills the above mentioned JerkJock's friends stabs the dead body of the friend in the head over and over again, way more than needed. Could be considered TemptingFate''/''KarmicDeath since Wolf impales him exactly the same way while he is doing it
* DownerEnding: In a WhatCouldHaveBeen example, during the [[WordOfGod Brothers Strause]] DVDCommentary they mention that they thought of an ending where, after being handed the Predator weapon, the "rescuers" lifted up their weapons and the screen would cut to black with the sound of the rifles firing full-auto. Ouch.
* FateWorseThanDeath: It's implied that the mother impregnated (in the hospital) by the predalien can ''feel the multiple bursters breaking into her womb and eating her children''.
* GenreBlind: "The government wouldn't lie to us!". Anyone who has seen any ''Alien'' or ''Predator'' thing ever can tell you how wrong that is.
** As can anyone who has been exposed to...well any form of media.
* GoryDiscretionShot: Averted. All the {{gorn}} is put on full display, such as when we see an Alien impregnate a pregnant woman and the "babies" eat their way out later.
* HybridMonster: The Predalien, though it's not truly a hybrid since aliens always take traits from their host.
* ImperiledInPregnancy: The Predalien is completely indiscriminate in its victims, invading a maternity ward in the town's hospital and implanting pregnant women with its own xenomorph embryos.
* InfantImmortality: Gleefully averted in the second film, which has the aliens killing kids and [[BlackComedy even eating babies]]. However, [[GoryDiscretionShot none of it actually happens onscreen]], except for one kid falling victim to a facehugger.
** One of the final four survivors is a child though
* InstantSedation: Facehuggers seem to be able to knock someone out within six or seven seconds in this film. People have speculated that they use their tails to knock someone out, but that would require a precise chokehold (a blood choke specifically). The speed of the knock out suggests they sedate their host through some unknown means; the best examples being the two homeless men.
* JustFollowingOrders: This is how the soldiers react when called out on [[spoiler:destroying the town with a nuclear bomb]].
* MarketBasedTitle: ''Requiem'' is known in some countries as ''Aliens VS Predator 2'', conveniently [[FridgeBrilliance combining the names of the second Alien movie and second Predator movie into the second AvP movie.]]
* TheMountainsOfIllinois: In ''Requiem'', the shot of "Gunnison" clearly is not. The mountains are far too small and the town is far too big.
* NeckLift: Wolf does this simultaneously to two aliens who attempt ambush him
* NoOSHACompliance: The power goes out in ''AVP Requiem'' and it seems that not a single building in the town has emergency lighting, and even the hospital's emergency generator mostly just makes the fluorescent lights flicker.
* OneRiotOneRanger: The Xenomorphs are loose on a planet with billions of people that can potentially spawn just as many Xenomorphs...and only Wolf responds to deal with the problem.
* RedshirtArmy: The National Guard unit sent to Gunnison only gets about ''a minute'' of screentime before they're all killed in an alien ambush.
* SchrodingersCanon: The films are half this, half FanonDiscontunity, and pretty well into CanonDiscontinuity with the release of Prometheus.
* ShotgunsAreJustBetter: After taking some damage to his plasma casters, Wolf takes the remaining one and reconfigures it into a handheld weapon similar to a shotgun. It can only fire one shot at a time, and cocking it activates a recharge sequence.
* SlasherMovie: Some fans complained that AVP-R turned both franchises into mere Teen Slasher monsters, screaming blond and all.
* TelevisionGeography: Virtually every shot of "Gunnison, Colorado" is wrong. (See TheMountainsofIllinois above.)
* TooDumbToLive: Several:
** The Predators in the ship who carry Scar's body do not scan him for any Xenomorph infestation. Even if that is counted out as overlooked due to Scar's death, it does not explain the stupidity of one Predator opening fire on the Predalien and causing the ship to crash.
** The father and son who should've taken off immediately stop for some time when the boy falls down, and are taken out by the facehuggers.
** The homeless men who were staring into the bubbling water, doubly glaring since their dog found pieces of a corpse in the sewers.
** One alien who attacks and disables one of Wolf's plasma cannons, hisses at him and ''slowly'' moves towards him. The results are predictable
* WalkingArmory: Wolf, especially after taking up the fallen Predators' weapons.
* WhipSword: Wolf's bladed whip can slice up an enemy by wrapping around him and pulling in. It's also made from a Xenomorph's tail.

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