'''''Phantom of Inferno''''' is the first release by the visual novel developer {{Nitroplus}}, whose games are almost invariably dark, scary, and full of murder. Nitroplus can be considered a blender of ideas, but ''Phantom'' in fact has a simple story in comparison to their other games.

The story follows the life of a young man who [[HeKnowsTooMuch sees something he shouldn't have seen]], is captured and {{brainwashed}} by a [[TheSyndicate shadowy organization]] called Inferno and then is given the choice "join or die". He is trained as an assassin by a [[SugarAndIcePersonality soft-spoken]] girl called Ein. Ein is Inferno's top assassin, code-named "Phantom" and controlled by the sinister Scythe Master, who also brainwashed the man. The man is given the name Zwei and begins his work at Inferno.

The game was first given an adaptation which tried to sum up the game in 3 OVA episodes. In 2009, a new anime entitled ''Phantom ~Requiem for the Phantom~'' was produced by BeeTrain with [[GundamUnicorn Yosuke]] [[HoneyAndClover Kuroda]] writing and supervising the scripts (including a few from the original scenarist himself [[Anime/PuellaMagiMadokaMagica Gen]] [[FateZero Urobuchi]]) and directed by KoichiMashimo. The game has since been remade for the XBox360 featuring the anime design created by Bee Train, for October 25, 2012 release.

Notably, previews for the original game's second release aired at around the same time as ''Anime/{{Noir}}'', which led to viewers connecting the two (as they have [[CoolGuns similar]] [[GirlsWithGuns themes]]).
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!!This work provides examples of:
* AccidentalAthlete: Drei
* AdaptationFirst: Averted. Although it's very rare and hard to find these days, the original visual novel was released in the U.S. by Hirameki, making it not only one of the very few to be released with an official English translation but also one of the even rarer few to be released with an English translation ''before'' its animated adaptation was.
* AnyoneCanDie: Played straight, played with, subverted, averted, inverted, whatever. [[spoiler:Drei, Scythe Master, Ein, Zwei, Claudia, Lizzie, a LOT of people. Just take your pick.]]
* BadassNormal: [[spoiler:Reiji]] had implausible fighting capabilities ''before'' joining Inferno.
** Later turned into just plain BadAss after the [[spoiler: first time skip]]
* BaitAndSwitchCredits: The second opening plays with this. The actual footage makes things look like a slice of life series, but the intentional SoundtrackDissonance from the song by Music/AliProject suggests that things aren't nearly as peaceful as they seem.
* BloodierAndGorier: The OVA features several messy deaths of the BoomHeadshot variety.
* BodyguardCrush: Zwei and Cal, Mio and Shiga.
* {{Brainwashed}}: Scythe does this to Ein to keep her loyal. [[spoiler:After Claudia's coup d'etat, the process is ceased and reversed on the agents they still have. Scythe himself later decides that ''[[NotBrainwashed not]]'' brainwashing his subordinates may actually make them stronger.]]
* BrainwashedAndCrazy
* BreakTheCutie: Arguably the entire premise of the series. In fact, [[WhyWeAreBummedCommunismFell this is the BigBad Scythe's Job when he's in Stasi, the East German secret police]].
* ChekhovsGunman - Back in chapter 2 of the original Visual Novel, there is a small scene where Godoh Daisuke calls and speaks to his niece back in Japan. Considering all of the action that goes on in the chapter, the player will most probably have forgotten about this call by the end of it. [[spoiler: Guess who turns out to be a main heroine in chapter 3?]]
* CoolGuns: And how!
* DarkActionGirl: Drei.
* [[spoiler: DeathByAdaptation]] / [[spoiler: RevisedEnding]]: The anime follows the "Ein" path from the visual novel and features the "Road of the Cerulean Sky" ending from it as its conclusion, with the exception that [[spoiler: in ''this'' version, Reiji and Ein both die at the very end.]]
* DemotedToExtra: In the OAV, Claudia's role was almost completely slashed so that she only appears briefly in the third episode. Additionally, since the OAV only loosely followed in Visual Novel's first act, Cal's only makes a very brief background cameo during the second episode, and notably she's [[AdaptationDyeJob a brunette]] rather than a blonde.
* DepravedBisexual: In Phantom: Integration, [[spoiler:Drei]] is one temporarily.
* DiabolusExMachina: [[spoiler:The last 15 seconds of the anime turned it from BittersweetEnding to DownerEnding. Since everyone capable of killing Reiji and Ein had already been introduced and defeated, whoever shot Reiji after the credits wouldn't be recognized in a lineup by Chekhov or viewers.]]
* [[spoiler: DownerEnding (Anime): [[DiabolusExMachina In literally the last minute of the show]], Reiji is shot & killed by a disguised assassin in a passing hay wagon, and Ein commits suicide by consuming a poisonous Oxytropis leaf.]]
* [[spoiler:EarnYourHappyEnding: The anime's ending ''was'' going this way...but see DownerEnding above! [[DiabolusExMachina Augh!]]]]
** [[spoiler:The Visual Novel, on the other hand, plays it completely straight.]]
* {{Expy}}: Drei looks exactly like Elise from the ''TriangleHeart3SweetSongsForever'' OVA, and though Elise is much more professional and Drei much more wild, their similarities don't end at using guns, speaking GratuitousEnglish and wearing purple. [[spoiler:Both are introduced after the bulk of the story and are put at odds with the male lead, whom they hate after a traumatic childhood incident involving a bomb planted by the BigBad, and the female lead, who's just along for the ride.]]
** Cal has some similarities with [[http://en.wikipedia.org/wiki/Leon_%28film%29 Mathilda]]: a teenaged girl trying to hire an assassin to avenge her murdered sibling, beginning to fall in love with said assassin, and learning the art of killing herself.
* FallingChandelierOfDoom: One of the Zahlen Schwestern gets this treatment.
* {{Fanservice}}: Ein, Claudia, Drei, Mio, and the Zahlen Schwestern.
* FanDisservice: Scythe Master licking Ein suggestively in the first couple hours of play.
* GaidenGame Phantom: Integration is Phantom of Inferno with hentai.
** And an extra ending.
* GainaxEnding: In the anime, [[spoiler: Reiji is shot dead and Ein lies in the grass smiling. Questions remain, is Ein dead, did Inferno kill Reiji or did Ein? Is Ein dead, did she eat a poison flower? The ending is still hotly debated.]]
** [[spoiler: It's not clear if Reiji was actually killed either. We never actually see him get hit, and he ''has'' survived bullet wounds in the past.]]
* GettingCrapPastTheRadar: See FanDisservice for the example. It fits two tropes (Hirameki released the game as 13+).
* GenreShift: Joked around with. The anime's second opening will leave you surprised.
* GeographicFlexibility: the anime dub states that everything is occurring around Los Angeles, with the desert scenes likely occurring in the Mojave desert to the east. However, if you look at "LA" (or know anything about it), it doesn't have the following: Honolulu's skyline, New York's Chrysler Building, Miami's shoreline, etc.
** This is made even worse when Ein drives what appears to be a Fiat Cinquecento, which was never available in North America.
* GirlsWithGuns
* TheGunslinger: Ein and Drei.
* HeyItsThatVoice - Anime. If you listen carefully, you'll hear [[{{Gundam 00}} Feldt and Saji]] from Ein and Zwei. Creator/AyaHisakawa gives her stunning voice to the series as well.
** Game and OVA. Creator/KikukoInoue voices Claudia. Ai Orikasa of [[TenchiMuyo Ryoko]] fame does Lizzie.
** [[KingdomHearts Sora, is that you?!]] (in Requiem at least)
*** Coincidentally, Reiji's [[Creator/TakahiroSakurai voice actor]] in the OVA happens to be [[FinalFantasyVII Cloud Strife]].
** In the original game, Creator/KenNarita voices Scythe.
** Apparently Creator/MiyukiSawashiro voiced biker girls long before [[{{Durarara}} Celty Sturluson]].
* {{Homage}}: Cal recites lines from films such as DirtyHarry and TaxiDriver as she is learning to fire a gun.
** Possible homages to the Girls With Guns Trilogy also created by the animation studio BeeTrain. One example The white dresses worn by the Zahlen Schwestern girls look like the dresses worn by {{MADLAX}} and Margaret Burton in the series.
*** If anything the Girls With Guns Trilogy had {{Shout Out}}s to Phantom since it predated the earliest entry, ''Anime/{{Noir}}'' by about a year. There's more than just the Zahlen Schwestern outfits, for example Ein and the three main characters, Kirika, Margaret and Ellis all have no recollection of their past and Reiji is shown to have almost super-human Assassin instincts like Kirika.
* IKnowWhatWeCanDoCut: Scythe's plan in episode 6.
* JapanesePronouns: Zwei uses the pronoun 'boku' to refer to himself most of the time before the timeskip. Afterwards, he uses 'ore'.
* KarmaHoudini: In the anime [[spoiler: Raymond [=McGuire=], leader of Inferno, has Reiji assassinated and Ein commits suicide, and even though he's lost Scythe Master and his assassins, still controls Inferno and most of the US criminal underworld.]]
* [[spoiler: KillEmAll: Of all the named main characters, only Mio and KarmaHoudini Raymond [=McGuire=] are still standing at the end.]]
* LighterAndSofter / DenserAndWackier: The Picture Dramas, which frequently portray Reiji as both the OnlySaneMan and a major ButtMonkey, Ein as TheComicallySerious, and Scythe as a LargeHam with the entire cast discussing rather mundane things most of the time rather than anything crime or assassin related but still treating everything as SeriousBusiness. Several of the shorts even portray Reiji and Ein as ''live action puppets''.
* MafiaPrincess: [[spoiler:Mio. Even ''she'' doesn't know about it.]]
* MoodWhiplash: The first half of Episode 20 in the anime. After such a solemn ending to the last episode, you may question if the anime is playing a joke on you by suddenly switching gears to a high school comedy. However, for the second half of the episode it's just buissness as usual.
** Ein and Zwei suffer from this, though often it is part of their cover. It almost seems as if Ein and Zwei are completely seperate people from Eren and Reiji.
* MutuallyExclusivePartyMembers: [[spoiler: If you come down to the choice between Ein and Cal at the end of chapter 3, the one Reiji doesn't search for will die by the end.]]
* NotBrainwashed: Drei is the result of Scythe's "thought experiment" to see if keeping her memories and playing on her old grudges will keep her as loyal and efficient as removing her memories altogether would.
* NotQuiteDead: Over and over and over...
* TheOjou: Mio.
* OminousMusicBoxTune: Drei's music box.
* RecapEpisode: Episode 11. Parts of episode 19 as well, but not as bad as episode 11.
* ScarsAreForever: In the anime after Reiji is shot by Scythe at one point, the bullet wounds leave permanent scars over his body. This is most evident in one brief scene where he's sun-tanning on his apartment roof and they're clearly visible over his chest.
* SexyBacklessOutfit: Ein's party costume in episode 6 and the dresses of the Zahlen Schwestern, both in the recent anime and in the visual novel.
* ShoutOut: The first episode has a few homages to {{Scarface}} including the Giant Globe bearing the words ''The World is Mine.''
** Reiji and Cal's initial relationship is a notable homage to one between the two protagonists of the film ''[[Film/TheProfessional Leon]]''.
* ShownTheirWork: The original game went into ''ridiculous'' levels of detail when it came to the guns. You got ''lectures.''
* SlasherSmile: [[spoiler: Reiji near the end of episode 10.]]
* SleepCute: Cal and Reiji in the second anime, [[BleachedUnderpants oddly replacing a sex scene.]]
* SpellMyNameWithAnS: Is it Elen or Eren?
* TheSyndicate: Inferno.
* VagueAge: The only apparent reason to why Drei grew up and Ein/Zwei didn't.
* VideoGameRemake: Remade for XBox360 featureing the new character designs created in the anime series ~Requiem for the Phantom~ as well as the voice cast.
* VivaLasVegas: One episode has Ein carry out a hit at the Paris hotel.
* WhiteMaskOfDoom: Worn by assassins.
* WhyFandomCantHaveNiceThings: When FUNimation picked the series up for simulcast streaming episode 10 was leaked prematurely causing an indefinite postponement of further North American simulcast streams. The simulcast did eventually return.
* YouAreNumberSix: Ein, Zwei, Drei as well as the individual members of the Zahlen Schwestern in the anime.
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