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''Metroid Prime'' is a 2002 First-Person Shooter for the NintendoGamecube. It is the fifth game in the ''{{Franchise/Metroid}}'' series, and the first of the ''VideoGame/MetroidPrimeTrilogy''. It is also the first ''Metroid'' game to be in 3D.

The story takes place shortly after the events of the first ''{{VideoGame/Metroid|1}}''. After destroying the Space Pirates' base on Zebes, Samus travels to its neighboring planet Tallon IV, where surviving Pirates have set up a second base, resumed Metroid cloning, and are harvesting a mysterious substance called Phazon. Samus battles through the planet's various environments, putting down Pirate operations where ever she finds them, but in searching for the origins of Phazon finds that it extends much further, to when her adopted people the Chozo still lived on the planet. Something terrible from the stars came to Tallon IV years ago, bearing corruptive Phazon and a powerful beast the Pirates call the Metroid Prime...

!!''Metroid Prime'' includes examples of:
* AdaptationInducedPlothole: Simultaneously inverted ''and'' played straight with the final boss. In the original game, Metroid Prime had been captured by the Pirates and studied for a while, before breaking loose and returning to her point of origin, explaining its fancy assimilated Zebesian tech armor, but said point of origin is behind an impenetrable barrier you spend most of the game deactivating. Other regions and later adaptations covered over the plot hole by re-writing the relevant story entries so that the Pirates never captured it... but, in so doing, opened ''two'' other plotholes, namely, where the armor came from and how the Pirates knew enough about it to call it Metroid Prime.
* AlwaysCheckBehindTheChair: Prior to obtaining the X-Ray Visor, at least.
* AmbiguousRobots: Meta Ridley qualifies, as there's little to indicate how much of him is still living and how much is robotic; the only visible organic parts are some muscles on his legs and the top of his head.
* AntagonistTitle: Metroid Prime is an enormous Metroid residing in the Impact Crater, so mutated by Phazon it barely even resembles a Metroid anymore.
* AntiFrustrationFeatures: Attempting to navigate an obstacle that looks passable but actually isn't (such as a barely-out-of-reach ledge underwater without the Gravity Suit) a few times will bring up a prompt telling you to come back later with the proper powerup. And if you spend a long time dinking around and wandering, a prompt will appear and mark on your map your next destination. This can be disabled if you find it distracting, or want to find out where to go on your own.
* ApocalypticLog: The Chozo left behind writings and lore describing their encounter with the meteor and subsequent attempts to contain it. They succeeded in containing the worst of the Phazon, but significant amounts of it escaped and started poisoning everything, including the Chozo.
** Also present in some of the Pirate Logs when talking about how thoroughly Samus trashed their [[{{Metroid}}previous operation on Zebes]]. Or how she's now on Tallon IV and tearing through their forces.
* AscendToAHigherPlaneOfExistence: In the lore logs, it is claimed that the Chozo that lived on Tallon IV did this, but were pulled back by the meteor crashing on the planet.
* AwesomeButImpractical: The charged combos apart from the [[BoringButPractical Super Missile]]. They do have some uses, though; for example, the Wavebuster tears through robotic enemies and can put some serious hurt on bosses like Meta Ridley or [[spoiler: Metroid Prime (when it's weak to the Wave Beam, at least)]].
* {{Backtracking}}: Oh, yes. Have fun combing Tallon IV to find all 12 artifacts and [[OneHundredPercentCompletion every single pickup]]!
* BagOfSpilling: During her escape from Frigate Orpheon, Samus gets caught in an explosion and loses all her powerups except her suit and Power Beam. She gets them all back on the planet itself.
* BarrierChangeBoss: Metroid Prime, which periodically changes its weakness to one of your four beams.
** [[spoiler: Metroid Prime's second form]] is an odd example; while it's only weak to one weapon [[spoiler: [[EleventhHourSuperpower (the Hyper Beam)]]]], it is only visible in one spectrum at a time, requiring you to change which visor you're using to actually hit it.
* BatmanCanBreatheInSpace: Ridley, who actually manages to one-up this by flying directly from an orbiting space frigate to Tallon IV, [[note]]an impossible feat, considering that space has no air molecules to push against in flight, though his "flight" may have been powered by his mechanical parts, with the wing flapping as just muscle memory,[[/note]] surviving re-entry in the process.
* BattleInTheRain: It's constantly raining on the Tallon IV Overworld, so you can have mini-battles in the rain all the time. You have a boss battle in the rain when you face off against Ridley.
* BigBad: Meta Ridley and Metroid Prime. The Metroid Prime caused the Phazon crisis on Tallon IV, Meta-Ridley led the Space Pirate operations there.
* BlackoutBasement:
** Removing some power sources or upgrades releases captured Metroids and shuts off the lights. The Space Pirate Base in Phendrana is an excellent example.
** The atmosphere turns dim when you fight Chozo Ghosts. The first time, it is ''terrifying''.
* BoringButPractical: Super Missiles, compared to the other charge combos. It is also required to beat the game (as it is used to blow up objects); the other beam combos are not.
* BreathWeapon: Besides Ridley, since he is a Space Dragon, Metroid Prime, Sheegoths and the Parasite Queen.
* BullfightBoss: The Plated Beetle, which has bulletproof armor over its head.
* BubblegloopSwamp: A good part of the Tallon Overworld.
* CallForward: Scanning the first Metroid in Glacier One will reveal the information of its home planet, [=SR-388.=] ''VideoGame/MetroidIIReturnOfSamus'' takes place on the planet.
* ChasingYourTail: Parasite Queen.
* CheckPointStarvation: The [[ThatOneLevel Phazon Mines]]. There's a save station, near the entrance. Better use it, 'cuz it's the last one you'll see for a long time. Getting to the next one requires you to run a gauntlet of shadow troops, mega turrets, wave and ice troopers, and two mini boss battles against an elite pirate and a [[InvisibleMonsters cloaked drone]]. The drone battle is especially cruel, as it ambushes you right outside the next save station, which is blocked by debris. The only way to clear away the rubble, is with a power bomb (earned by beating the drone then navigating an electric mini maze). In all, it'll take you about half an hour or more of nonstop fighting and puzzle solving to get from that first save station to the next one. And if you die at any point along the way, you get to do it all over again.
* ChekhovsGun: Scan lore in the Artifact Temple discusses Chozo statuary, ending in the line: ''Those who deface or destroy them will know our wrath, unfettered and raw''. Much later, [[spoiler:Ridley smashes the Chozo statues over the Impact Crate entrance, and thus get blasted by the remaining ones with lasers to the chest.]]
* CircleOfStandingStones: The Chozo cipher is shown as a series of stone monoliths in two rings.
* ColourCodedForYourConvenience:
** The Space Pirate Beam Troopers, [[note]]in Power, Wave, Ice, and Plasma flavors, to match your beam weapons,[[/note]] the Fission Metroids, and Metroid Prime. Their current color is the color of the only weapon type that can harm them.
** The doors are colored based on what is needed to open them.
* ContinuityNod: The remixed music. Tallon Overworld's first theme is a remix of the first Metroid's Brinstar, Tallon Overworld's second theme is a remix of Green Brinstar, and Magmoor Caverns is a remix of Lower Norfair.
* ConvectionSchmonvection: Averted. Without the Varia suit Samus will take damage from simply entering an area that has lava. This only applies to ''Prime'', as Samus keeps the Varia Suit throughout the rest of the trilogy.
* TheDevTeamThinksOfEverything:
** Despite that there's no way you should ''have'' it at the time, Thardus is still weak against the Plasma Beam.
** Throwing on the X-Ray Visor will make Samus's right hand visible. In addition, the hand will make a different gesture depending on which beam is active. A close look reveals the gesture will match the symbol for each weapon, which is shaped like Samus' hand.
* DisneyVillainDeath[=/=]JokerImmunity: Happens to Ridley. He's pushed off a cliff by lasers and explodes. He comes back in ''Corruption'', however.
* DownTheDrain: The Crashed Frigate, combined with TechnoWreckage.
* DubNameChange: In the Japanese version, Phendrana Drifts and Magmoor Caverns were known as "Ice Valley" and "Lava Caves", respectively.
* DummiedOut:
** Like ''VideoGame/MetroidZeroMission'''s removal of Crocomire, ''Prime'' would have had a battle with an old boss... Meta-Kraid, which would have marked his first official 3-D appearance. [[http://metroid.wikia.com/wiki/Image:MP_Kraid.jpg A picture of what he would have looked like was shown by one of the modelers.]]
** ''Prime'' also had voiceovers that were supposed to introduce each area by name; all are still on the disc, but the scripting is broken. The only trigger that actually works is transitioning from Tallon Overworld to Impact Crater or vice versa. Additionally, an introduction to Samus and what she has done was voiced over in ''Prime'' - not the one that ended up in the game by the narrator, but Jennifer Hale herself!
* ElaborateUndergroundBase: Most of Phazon Mines is underground, and serves as the Space Pirates' main base on Tallon IV.
* EmbeddedPrecursor: The original NES Metroid is included as an unlockable if you link Prime to MetroidFusion. It includes a save feature and a new control scheme mimicking that of Prime.
* TheEndOrIsIt: The [[HundredPercentCompletion 100% endings]]: [[spoiler:The hand from Samus' Phazon Suit (absorbed by the eponymous villain) pops out of a puddle of phazon with an eye on the back]].
* EnemyScan: Courtesy of the Scan Visor. Helps indicate particular hazards and/or weaknesses.
* EternalEngine: Upper Phazon Mines.
* {{Expy}}: Thardus is basically the Metroid universe's answer to [[Film/GalaxyQuest Gorignak]].
* EyeOpen: How the OneHundredPercentCompletion bonus ending ominously ends.
* EyesDoNotBelongThere: The 100% ending of Prime has [[spoiler:an eye open on the back of a hand emerging from a Phazon puddle, later revealed to be Dark Samus.]]
* FailedASpotCheck: A pirate log notes that [[CoolShip Samus's gunship]] is invisible to their scanners and they're reduced to searching the old-fashioned way and hoping they get lucky. Fair enough, except said gunship is parked in the open, plainly visible as orange on a field of green, two rooms and less than a kilometer away from the crashed Pirate frigate.
* FeedItABomb: The Triclops enemies that often show up in the Morph Ball puzzles. They try to grab any round object they see, which might be Samus... or one of her bombs.
* FireIceLightning: The Plasma, [[ExactlyWhatItSaysOnTheTin Ice]], and Wave Beams, respectively.
* FungusHumongous: Lower Phazon Mines.
* GenreSavvy: One of the Pirate Logs in Research Lab Aether notes that the Metroid transportation protocols also apply to sedated and dead Metroids. Unfortunately for [[ForScience the pirates]], this is pretty much as close as they get.
* GrimyWater: The water in the Chozo Ruins is initially toxic, due to a giant plant monster poisoning the water's source. Once you've defeated it, the water clears.
* GuideDangIt: You can kick Thardus out of its RollingAttack with a bomb.
* InterfaceScrew: Electrical attacks and certain other attacks (such as the projectiles launched by the Chozo Ghosts) will create static on Samus's visor for a few moments. The Sentry Drones are notable for causing an InterfaceScrew just by being present (flavored as being designed to mess with visor technology).
** Also, steam vents in certain areas will temporarily fog up the visor.
* JumpJetPack: The Space Jump, which, unlike the 2D games, just gives Samus a second jump in midair.
* KillItWithFire: The Plasma Beam and its charge combo, [[ExactlyWhatItSaysOnTheTin the Flamethrower]].
* KillItWithIce: The Ice Beam and Ice Spreader. [[ExactlyWhatItSaysOnTheTin Duh.]]
* LethalLavaLand: Magmoor Caverns.
* LoadBearingBoss: The Parasite Queen. [[JustifiedTrope Justified]], since she falls right into the main reactor after you kill her. Also [[spoiler: Metroid Prime, whose death causes the Impact Crater to collapse.]]
* LostForever: Did you remember to scan the boss before you killed it, or scan something on a level before the point of no return? No? Well then, say goodbye to OneHundredPercentCompletion!
** The Ice Shriekbats in Phendrana Drifts are especially notable, as they only appear in a couple rooms and never respawn, unlike all the other normal enemies in the game.
* MonsterCloset: The first adult Sheegoth you fight pops out of a wall that was concealing a dead-end room just big enough for it.
* MythologyGag: One of the spider-ball puzzles in the game is a subtle tribute to Gunpei Yokoi's old Nintendo toy, the [[http://en.m.wikipedia.org/wiki/Nintendo_tumbler_puzzle Ten Billion Barrel]].
** Some of the Morph Ball puzzles switch to a camera view that mimics the side scrolling morph ball tunnels of the original games.
* NotQuiteDead: You may have defeated the exterior of Metroid Prime, but the interior still lives even after you defeat it.
* OminousLatinChanting: The music for the title screen, credits, and Magmoor Caverns.
* OneHitKill: A fully charged Plasma Beam will often completely incinerate enemies you point it at.
* OneWingedAngel: Metroid Prime's second form.
* PowerUpMagnet: Holding a charged shot will attract any nearby powerups.
* RaisedHandOfSurvival: Finishing with OneHundredPercentCompletion adds a brief cinematic showing a hand reaching out from [[spoiler: the puddle of [[ToxicPhlebotinum Phazon]] that was once the title creature. At the time the player would have no idea who or what this is: Metroid Prime reviving as Dark Samus, Samus Aran's nemesis throughout ''Prime 2'' and ''3'']].
* RealTimeWeaponChange: You pick which beam weapon you want by flicking the C-Stick.
* RedAndBlackAndEvilAllOver: Played with by Samus' Phazon Suit (which comes in a nice black, grey, and red color scheme): Samus is most definitely not evil, but the Phazon corrupting her suit ''is''.
* ShoulderCannon: The Elite Pirates have shoulder-mounted plasma cannons. The Omega Pirate [[DualWielding has two]].
* SigilSpam: The "Scan Here" callouts carry the symbol of the twelve artifacts.
* WombLevel: The Impact Crater, which contains what look like bones and giant teeth. Doubles as TheVeryDefinitelyFinalDungeon.