[[folder: [[Do Not Adjust Your Set I am Kira, ]]
and I have come to answer the grievances of the people of Japan against [[EvilEmpire the Britannian Empire.]] For seven years, Japan has been brutally oppressed to satisfy the greed, ambition, and imperialistic tendency of Britannia, but now I am putting an end to that oppression. The Britannian Empire must pull their forces out of Japan in 52 hours from now. If they do not, I will kill the Emperor and his children. And to demonstrate my power, I will take the lives of two of Britannia's agents of propaganda. They will die for spreading lies and misinformation for the sake of the occupation and to make it clear that even the Emperor is defenseless against my power.]]"''

''[[http://www.fanfiction.net/s/4705142/1/Zero_vs_Kira Zero vs Kira]]'' by Crossover Maniac is a ''Anime/CodeGeass'' and ''Manga/DeathNote'' crossover where Light Yagami [[TrappedInAnotherWorld is teleported to the Code Geass world]] when a Britannian world-breaching experiment [[GoneHorriblyRight Goes Horribly Right]]. Furious that the Britannians tried to kill him and enslaved his country, Light introduces the power of Kira to the ''Anime/CodeGeass'' world when he declares war on Britannia. [[IChooseToStay Also seeing no immediate way of returning home, Light feels he may as well]] [[UtopiaJustifiesTheMeans create the New World he envisions here.]] Meanwhile, Kira's activities have put a SpannerInTheWorks for resident MagnificentBastard Lelouch's plans and as Zero he intends to do everything in his power to bring Kira down...

!!Provides Examples Of:
%%* {{Adorkable}}: Tarou, Light's roommate.
* AffablyEvil: Light is apparently "the best roommate a guy could have!"
%%* AlternateUniverseFic
%%* AnotherDimension
%%* ArbitrarySkepticism: "There's no such things as curses or the supernatural! Thatís completely ridicu--" *ick, gack!*
%%* ArchEnemy: Light and Lelouch.
* ArsonMurderAndAdmiration: Lelouch is admittedly jealous that Kira has accomplished what he set out to do.
%%* AssholeVictim: The Brittanian soldiers.
%%* BadassBookworm: Light and Lelouch.
%%* BadGuysDoTheDirtyWork: [[spoiler: Kira overthrows Brittania.]]
* BatmanGambit: [[spoiler: Light controlled some Britannian bullies to attack Tarou while on the train so he would be saved by and befriend Suzaku for the sake of ThePlan.]]
%%* BigBad: Light, [[spoiler: After [[CurbStompBattle curbstomping]] Britannia.]]
* ButterflyOfDoom: [[InvertedTrope Inverted,]] [[{{Irony}} many positive changes have been happening to Lelouch and his world since Light's arrival...]]
%%* ButtMonkey: Light has usurped Lelouch in this role as well...
%%* CasualDangerDialog: "What took you so long?"
%%* ClassifiedInformation: Which is easily accessed via geass command or supernatural notebook.
%%* CollidingCriminalConspiracies: Kira's presence has really screwed up Zero's plans.
* ContrivedCoincidence: somehow a porthole Rem opened and a porthole the Britannian military opened connected, sending Light to the ''Anime/CodeGeass'' world.
%%* CrazyPrepared: Light and Lelouch
%%* CrazySurvivalist: Light.
%%* CriminalMindGames: [[spoiler: Zero, did you know Shinigami love apples?]]
%%* CurbStompBattle: [[spoiler: The Britannian military versus Kira (who has access to their personnel files...)]]
* DeadPersonImpersonation: Light Yagami alters the records of a dead man in this universe with a similar name to his and takes over his identity.
* DeathByRacism: Colonel Taurus like all of the Brittanian military is horribly racist against the Japanese. [[MuggingTheMonster He is killed moments after mocking Light Yagami because of his race.]]
%%* DeathSeeker: Suzaku just like in ''Anime/CodeGeass'' canon. He becomes even more so after [[spoiler: Euphie dies.]]
* DecadentCourt: Like in ''Anime/CodeGeass'' canon the Brittanian royal family. [[spoiler: After killing the Emperor and his heirs Light has a hard time finding someone competent enough to serve as his puppet.]]
* DevilInPlainSight: Light. He seems to realize this when Tarou is enthusing about him to Suzaku, about how his roommate is a genius and awesome and manages to affect some modesty.
* DidWeJustHaveTeaWithCthulhu: [[spoiler: Cecile upon realizing that [[ChekhovsGunman the guy]] InTheHood she just got a glimpse of was ''Kira'' and that he is offering them protection in exchange for her and Lloyd's obedience.]]
* DoNotAdjustYourSet: Light sends a message to the media informing everyone that if the Brittanian forces don't leave Japan Kira will kill the royal family. [[spoiler: Lelouch realizes afterwards that since there was no chance of Brittania ever bowing to such a demand the message was actually meant for ''him'' and his Black Knights. Kira was letting them know when to strike-[[UnwittingPawn in other words Kira used them.]]]]
%% * DrivenToSuicide: [[spoiler: Misa.]]
* DueToTheDead: This trope gets invoked when both the Britannians and the Black Knights are LOOKING REALLY HARD (cutting up corpses) to find the cause of the mysterious heart attacks.
%%* TheEmpire
%%* EvilVersusEvil: Kira versus Britannia
* FakingTheDead: When Light kills the royal family he misses Lelouch and Nunnally because they are listed as dead.
* FatBestFriend: Tarou to Light.
* FateWorseThanDeath: [[spoiler: Marianne seals [[WhoWantsToLiveForever V.V.]] [[AndIMustScream in concrete.]]]]
* FishOutOfTemporalWater: Light, {{lampshaded}} by Tarou "Sometimes, you act like you've been living in another world or something."
* FixFic: for ''Anime/CodeGeass'' Light's presence creates a ripple effect preventing a certain DeusAngstMachina from ever coming to pass...
* [[ForScience For Science!]]
* FullCircleRevolution: In chapter 6, Zero holds a press conference telling Kira that he has simply "substitute(d) the tyranny of the Britannian Empire with your own."
** It does settle an years-old argument: Lelouch is morally superior to Light because he truly believes "Only those who are willing to be killed should be allowed to kill", while Light just kills whoever annoys him.
*** In addition, the Black Knights come to the conclusion that, ultimately, Kira's "justice" is draconian, does not allow the Japanese people to judge their own in a fair trial, and may even extend to death for the least serious of crimes. Even Kallen, who was originally a staunch supporter of Kira, changes her view when she realizes that her own mother, whose only crime was drug abuse, is at risk of being killed by Kira.
* GambitPileup
* GeneralFailure: Colonel Taurus and [[spoiler: Emperor Lloyd. Luckily for the people of Britannia, [[ShadowDictator Light]] takes responsibility of the actual ruling and policy-making- [[GoodIsDumb Evil is Competent.]]]]
* GoneHorriblyRight
* {{Gonk}}: Tarou
* TheGoodTheBadAndTheEvil: you decide which is which.
* GrayAndGrayMorality
* GrievousHarmWithABody: [[spoiler: when two Brittanian thugs attack him at once, Suzaku smashes them into each other.]]
* HeroWithBadPublicity: Zero and the Black Knights, after Zero declares war on Kira, "Japan's liberator," the people begin to turn on them.
* HollywoodHacking
* HorribleJudgeOfCharacter: Tarou.
* IHaveAFamily
* IKnowYourTrueName
* ILied: [[CaptainObvious it's what Light does.]]
* IntercontinuityCrossover
* ItsAllAboutMe
* KickTheMoralityPet
* KickTheSonOfABitch
* LackOfEmpathy: {{Lampshaded}}
-->'''Ryuk:''' [[spoiler: Your girlfriend]] killed herself.
-->'''Light:''' Oh.
* LastRequest: "[[CurbStompBattle Could you at least]] [[IKnowYourTrueName tell me your name?]]"
* MadScientist
* MagicAIsMagicA: Lelouch and C.C. are puzzled because they had attributed Kira's powers to Geass but they don't seem to be following the rules...
* MagicVersusScience
* TheMagicVersusTechnologyWar
* TheManBehindTheMan: [[spoiler: Kira to Emperor Lloyd and the newly restructured Britannia. Also Kira manipulated Zero and his Black Knights into attacking-much to Lelouch's rage when he realizes it.]]
* MoralityPet: Tarou, Light's roommate ('''''[[MoralityChain he was in desperate need of one...]]''''' ''[[{{WesternAnimation/Futurama}} My God, it's the future. My parents. My co-workers. My girlfriend. I'll never see any of them again...]] ({{Beat}}) [[{{WesternAnimation/Futurama}} Wohoo!]]'')
* MuggingTheMonster: [[DeathByRacism "Damn uppity Eleven, you think you're somebody]] [[TooDumbToLive because you can speak English and wear a suit."]] Also the Brittanian thugs that pick a fight with Suzaku.
* TheMultiverse
* NamedLikeMyName: Light finds records of a "Light Yagami" [[DeadPersonImpersonation that died some time ago during the Britannian occupation and assumes his identity.]]
* NotMeThisTime:
--> '''C.C.:''' No, I never made a contract with anyone named "Kira"... I don't know anyone by that name, and I don't know anyone with an instant death Geass, either.
* NotSoDifferent: {{Lampshaded}} and [[ShutUpHannibal defied.]]
* TheOnlyOneAllowedToDefeatYou: [[spoiler: with the rest of the royal family dead, [[RoaringRampageOfRevenge Lelouch feels cheated out of his revenge.]]]]
* OriginalCharacter: Tarou, Light's roommate.
* {{Otaku}}: Ryuk has gotten into reading manga ever since "Zero cut the cable."
* OurWormholesAreDifferent
* OutGambitted
* OutOfCharacter:
--> ''"I HEARD THE FIRST TIME! NOW SHUT YOUR TRAP AND LEAVE ME ALONE!" Lelouch shouted in annoyance of Nunnally's persistence.''
* OutsideContextProblem: Light, thanks to the Death Note, is this to the Britanians and Black Knights alike.
* PatrioticFervor: Light is very upset that his country is enslaved in this universe.
* ThePlan: When Lelouch and Light go at it, these are all over the place.
* PortalNetwork: the Shinigami Realm functions as one.
* RedShirt: [[spoiler: the first Britannian military characters to come into contact with Light Yagami...]] but that wasn't much of a spoiler, was it?
* {{Revenge}}: Nina wants revenge for Euphie
* RoaringRampageOfRevenge: Kira against Britannia, Nina against Kira, and [[spoiler: Lelouch feels cheated out of his revenge.]]
* SayMyName: [[LargeHam "Ki...rrrraaaa"]]
* ShadowDictator: Kira.
* ShoutOut
--> '''Ryuk:''' [[Manga/{{Bleach}} The Shinigami in the last dimension I was looking in chased me around with swords. They even called me names. I don't know why they called me 'hollow',]] [[CrowningMomentOfFunny but I didn't like it.]]
** Tarou was the name of the original Death Note user in the ''Manga/DeathNote'' {{Pilot}} chapter.
* SpannerInTheWorks: Light to Lelouch's "tasks at hand" by [[spoiler: [[SuspectExistenceFailure killing off the royal family before he gets a chance to question them and get his revenge for his mother's murder.]]]] Later Lelouch to Light's plans [[spoiler: by causing a localized communications blackout so he can't continue to punish criminals unless he wants them to pinpoint his location...]] Also because Ohgi [[spoiler: disobeys Zero's order about suspending recruitment, information leaks to Kira.]]
* TheSpook: Kira
* SuccessionCrisis
* SwirlyEnergyThingy
* TheyWouldCutYouUp: When the Brittanian soldiers are beating up Light the scientist cautions that they don't be too rough with him... because he wants to dissect him.
* TooDumbToLive: Emperor Charles declines an offer of immortality even after a [[GenreBlind mysterious force has threatened his life...]]
** Colonel Taurus, full stop.
* {{Transplant}}: Light and Ryuk in the ''Anime/CodeGeass'' world.
* TrappedInAnotherWorld: Light. Ryuk comes to keep him company.
* UnexpectedSuccessor: [[spoiler: All hail Emperor Lloyd!]]
* UnwittingPawn: Lelouch and [[BerserkButton is he ever PISSED when he finds out.]]
* VersusTitle
* VillainousBreakdown
* VillainousDemotivator: Britannia
* WhamEpisode: [[spoiler: pulled off on the part of the author where it looked like [[YouWillBeSpared Light spared Euphie...]] but...]]
* [[spoiler: YouKillItYouBoughtIt]]: [[spoiler: Kira killed off the Brittanian royal line and he now controls the Brittanian government.]]
* YouOweMe Apples
* [[YouRemindMeOfX You Remind Me of L]]: "Looks like your fighting L all over again. Hyuk hyuk."
* YouWillBeSpared: subverted.
* ZeppelinsFromAnotherWorld: Or rather "Giant Mecha From Another World".