History Fanfic / CodePrime

In the present day, Lelouch vi Britannia, an exiled prince of the Holy Britannian Empire, finds himself swept up in a conflict between a Japanese resistance cell and the military. The Autobots, after spending years in hiding, decide to finally reveal themselves when Viceroy Clovis orders the extermination of the Shinjuku Ghetto, leading to a meeting between the exiled prince and the Autobots, as well as the truth behind the rise of the Britannian Empire.

''Code Prime'' is also seen as an IntercontinuityCrossover from both ''Code Geass'' and ''Transformers'' as characters and elements from other continuities, such as ''[[Manga/CodeGeassOzTheReflection Oz the Reflection]]'' and ''[[WesternAnimation/TransformersRobotsInDisguise2015 Robots in Disguise]]'', are included. The first entry in the series is ''[[https://www.fanfiction.net/s/13151821/1/Code-Prime-R1-Rebellion R1: Rebellion]]'', which began on December 19, 2018. It was completed on November 22, 2020 with 36 chapters. The sequel ''[[https://www.fanfiction.net/s/13795604/1/Code-Prime-R2-Revolution R2: Revolution]]'' began on January 15, 2021, and was completed on October 3, 2023 at 38 chapters. On June 28, 2023, the author announced that there would be an R3, later revealed to be titled ''Resurrection'', but also confirmed that he will be taking a break from the series to focus on other projects.

* AliensSpeakingEnglish: As per the norm with Transformers. It's at least explained for the Autobots as they studied human Internet communications to learn the planet's languages. Oddly, when Megatron first meets the future Emperor, the two are able to talk perfectly fine despite Megatron not having known the planet had organic life, let alone have the time to study Earth communications. Perhaps whatever Cybertronian language Megatron was speaking was just really close to English?

* TheStationsOfTheCanon: For the most part, the big events of ''Code Geass'''s first season and the adapated episodes of ''Prime'' still play out, albeit in slightly different ways but with not too different outcomes. On the ''Code Geass'' side, it makes at least some sense in that Megatron only took a small role in Brittania's affairs and was unconcerned with it while he was working his own agenda. [[spoiler:Then the SAZ Massacre occurs in a way much more different than canon, followed by Megatron killing Charles and blowing the Britannian capital off the map, pretty much chucking all of season 2 of ''Code Geass'' right out the window.]]
** For R2, while much of Code Geass ends up in a different situation, parts of Transformers Prime Season 2 & 3 do happen in bits. Though the endgame is [[spoiler: more akin to the end of the pilot movie then the end of season 3]]

* TheStationsOfTheCanon: For the most part, the big events of ''Code Geass'''s first season and the adapated episodes of ''Prime'' still play out, albeit in slightly different ways but with not too different outcomes. On the ''Code Geass'' side, it makes at least some sense in that Megatron only took a small role in Brittania's affairs and was unconcerned with it while he was working his own agenda. [[spoiler:Then the SAZ Massacre occurs in a way much more different than canon, followed by Megatron killing Charles and blowing the Britannian capital off the map, pretty much chucking all of season 2 of ''Code Geass'' right out the window.]]

*** Related to this is the theme of redemption. Many of the heroes are working to live past their mistakes and past assumptions. But as part of the AdaptationalHeroism present through the story, many of the Britannians who were complex enemies of canon instead are given a chance to make it all right. To truly work to atone for everything whether they deserve it or not, and find a home in the greater family that the Black Knights became.
** Another theme is ThePowerOfTrust and the importance of working together in order to accomplish goals. The Autobots and Black Knights are able to work together and trust each other in order to cover weak spots and complete missions while the fighting between the Decepticons and Brittania, as well as both faction's internal squabbling, leaves them vulnerable to backstabbing that hinders their efforts.

''Code Prime'' is also seen as an IntercontinuityCrossover from both ''Code Geass'' and ''Transformers'' as characters and elements from other continuities, such as ''[[Manga/CodeGeassOzTheReflection Oz the Reflection]]'' and ''[[WesternAnimation/TransformersRobotsInDisguise2015 Robots in Disguise]]'', are included. The first entry in the series is ''[[https://www.fanfiction.net/s/13151821/1/Code-Prime-R1-Rebellion R1: Rebellion]]'', which began on December 19, 2018. It was completed on November 22, 2020 with 36 chapters. The sequel ''[[https://www.fanfiction.net/s/13795604/1/Code-Prime-R2-Revolution R2: Revolution]]'' began on January 15, 2021, and was completed on October 3, 2023 at 38 chapters. On June 28, 2023, the author announced that there would be an R3, but also confirmed that he will be taking a break from the series to focus on other projects.

''Code Prime'' is also seen as an IntercontinuityCrossover from both ''Code Geass'' and ''Transformers'' as characters and elements from other continuities, such as ''[[Manga/CodeGeassOzTheReflection Oz the Reflection]]'' and ''[[WesternAnimation/TransformersRobotsInDisguise2015 Robots in Disguise]]'', are included. The first entry in the series is ''[[https://www.fanfiction.net/s/13151821/1/Code-Prime-R1-Rebellion R1: Rebellion]]'', which began on December 19, 2018. It was completed on November 22, 2020 with 36 chapters. The sequel ''[[https://www.fanfiction.net/s/13795604/1/Code-Prime-R2-Revolution R2: Revolution]]'' began on January 15, 2021, and is set to end in September-October 2023 at 38 chapters. On June 28, 2023, the author announced that there would be an R3, but also confirmed that he will be taking a break from the series to focus on other projects.

In the present day, Lelouch vi Britannia, an exiled prince of the Holy Britannian Empire, finds himself swept up in a conflict between a Japanese resistance cell and the military. The Autobots, after spending years in hiding, decide to finally reveal themselves when Viceroy Clovis orders the extermination of the Shinjuku Ghetto, leading to a meeting between the exiled prince and the Transformers, as well as the truth behind the rise of the Britannian Empire.

''Code Prime'' is also seen as an IntercontinuityCrossover from both ''Code Geass'' and ''Transformers'' as characters and elements from other continuities, such as ''[[Manga/CodeGeassOzTheReflection Oz the Reflection]]'' and ''[[WesternAnimation/TransformersRobotsInDisguise2015 Robots in Disguise]]'', are included. The first entry in the series is ''[[https://www.fanfiction.net/s/13151821/1/Code-Prime-R1-Rebellion R1: Rebellion]]'', which began on December 19, 2018. It was completed on November 22, 2020 with 36 chapters. The sequel ''[[https://www.fanfiction.net/s/13795604/1/Code-Prime-R2-Revolution R2: Revolution]]'' began on January 15, 2021, and is set to end in September-October 2023 at 38 chapters. On June 28, 2023, the author announced that there would be an R3, but also confirmed that he will be taking a break from the story to focus on other projects.

* AdaptationalKarma: A rare societal version of this trope is applied to Britannia. The Autobots are doing considerably more damage to Britannia's forces and image than anything Lelouch could accomplish as Zero. [[spoiler: And at the end of ''R1'', the Deceptions straight up destroy the empire in an especially brutal and thorough way, with Pendragon being destroyed, Britannia's leadership being killed, imprisoned, and enslaved, and its armed forces being horribly slaughtered]].

* AndImTheQueenOfSheba: [[spoiler: When the Autobots capture Starscream and Cornelia after Airachnid webbed them up, Starscream pleads them to have him join their side, to which they distrust. Bulkhead makes a remark like this.]]

** [[spoiler: Cornelia faces off against the Transformer leaders during both the first and last acts, Her first duel with Optimus was set in a rather large place, surrounded by an audience, and with Optimus giving a fair fight and sparing her as part of the terms of the duel. Her fight with Megatron ends with her brutally outmatched, just between the two of them, and ends with her capture. While Optimus ensured she will fight another day, Megatron disables her Knightmare enough so that she gains a new one once the sequel rolls around.]]
** [[spoiler: The first and last major battles (not counting the first fight with the Lancelot) have similar circumstances; namely, them noticing that the fight is a setup. The Autobots manage to outwit the first set-up (Corenlia whittling them down with Knightmares before she sends her main force) by retreating, thereby gaining their first major victory, but they were unable to outwit the last set-up (pre-occupied by the Black Rebellion to even consider the fact that Britannia is being sacked) and it effectively grants the Decepticons their most major victory so far.]]

** Arcee questions if Euphemia isn't the kind of person to [[spoiler: start a massacre]], especially after their scuffle with Clovis. [[spoiler: Not only does Arcee become ''really wrong'' when considering canon, but the SAZ Massacre also happens in the fic itself, doubling as {{Foreshadowing}}.]]
** Shockwave questions Megatron on why he didn't use his knowledge of [[spoiler: Zero's identity]] to [[spoiler: try and turn the Black Knights against Lelouch]]. [[spoiler: He'd be proven very logical if he knew what happened in the original ''Code Geass R2''.]]

* CompanyCrossReferences: [[spoiler: The Decepticons' plan to overthrow Britannia may have been the first instance of it in the ''Transformers'' universe, but the plan itself is based on a prior crossover by the author: ''Worlds Collide'', wherein the [[Franchise/TeenageMutantNinjaTurtles Shredder and the Foot Clan]] overthrow [[WesternAnimation/AvatarTheLastAirbender Fire Lord Ozai and the Fire Nation]].]]

* LateArrivalSpoiler: The first chapter reveals that the boy we see with Charles in ''Code Geass'' is his young brother, V.V., aka Victor zi Britannia.

* PrecisionFStrike: [[spoiler: Dropped by Ohgi in ''Till All Are One'', in response to Megatron's NewEraSpeech.]]
* PretextForWar: [[spoiler: The lower-ranked Decepticons are on board with waging war on the Earth and desire to destroy Britannia in part due to their FantasticRacism and general lack of results, but it's when Megatron discovers the Ragnarok Connection and Charles' plans for it that he mobilizes a full-scale domination war over the Earth, with Britannia being the first to fall.]]

** The treatment of the Decepticons. [[spoiler: In ''Avatar Chronicles'', they become allies of the Fire Nation who are simply seeking to return to Cybertron, and become somewhat subservient to them despite their technological differences. In ''Code Prime'', the Decepticons have somewhat existed in a long Earth-time, have been mentoring Britannia, and utilize their technological gap to fully ransack said empire, taking over as the new BigBad by the sequel.]]
** Whereas ''Avatar Chronicles'' follows the Avatar story [[StationsOfTheCanon bit by bit]], while [[spoiler: ''Code Prime'' deviates from canon by giving its human protagonists affected character development, spare supposedly-dead characters and, by the end, has the Decepticons take over as the main villains.]]

* WatchingTroyBurn: The prologue opens with the Autobots forced to leave the dying Cybertron, then the canonical events of ''Code Geass'' happen and Japan is conquered by Britannia...[[spoiler: and the Decepticons force the royals to watch as they blast the royal palace to smithereens]].

** ''Ghosts'' sees Shockwave managing to successfully retrieve [[spoiler: the Driller]].

* BigScrewedUpFamily: Reconstructed. The Zevon family was a mess because the allure of being close to power through Charles's black ops team Pluton drove Oiagros to kill his sister for the position of head of the family. Then as part of the fallout, Orpheus was given away, and Oldrin ended up being traumatized by the murder. Oldrin then went into counterterrorism as a way to ensure she could fight Oiagros again in the future, while Orpheus ended up losing his love due to Oiagros wrecking his life going after Marrybell's sister. Sounds like a recipe for disaster right? Well, it turns out being separated was great for giving each of these members context for their family's actions and to build lives apart from that. Oiagros ended up having a HeelRealization and [[spoiler: became Wizard to resist Britannia in secret]]. Oldrin found love and began to repair her personality as a defender of innocents. And Orpheus ironically enough joined Peace Mark to fight against the greater structural problems that hurt his family too. So that by the time all of them are reunited to fight the Decepticons together, they may be strangers or angry, but they now see that they have a REAL family to rebond over rather than the mess that was created.

** This is the {{Last Word|s}} of [[spoiler: Swordmaster Scholtz]] when his Knightmare is disabled by Orpheus during the attack on Castle Weisswolf, right before he's finished off.

* ChekhovsGunman: In the first chapter, Lelouch Geasses a random Vehicon in the Mt. Fuji mine to help free the prisoners, then tells him to run off and rethink his life choices. Thirty chapters later in ''Damocles Rises'', that same Vehicon shows up again, [[spoiler: having had a HeelFaceTurn and helping Odysseus, Carine, and Laila escape Decepticon custody]].

** In ''Valley of Kings and Titans'', [[spoiler: the Enigma of Combination, working in conjunction with Leila's Geass, transforms the Black Wyverns' Knightmares (except Gino's) into Combiners, which can merge into a "Super Knightmare" called the Hercules]].

** During the battle in ''Damocles Rises'', [[spoiler: Underbite]] gets kicked off of the Ark, falling to his death.

** [[spoiler: Urabe]] sacrifices himself to blow up the Red Energon that Bruticus is trying to escape with, getting caught in the blast in the process but managing to damage the Combaticons enough that they're forced to flee.
** [[spoiler: Tink]] fires a Mega-Hadron Launcher at Devastator to shut off the Vortex Grinder and save the rest of his team, but the force of the blast sends Bonecrusher flying at his Knightmare, crushing him.
* EatMe: This is how Grimlock manages to overcome [[spoiler: The Driller]]. He has Alice drop him inside, then burns it from the inside.

* GiveMyRegardsInTheNextWorld: Right before killing [[spoiler: Quillfire]] at Castle Weisswolf, Rai says to give his regards to Breakdown, whom Rai killed during the Black Rebellion.

** In ''The Fires of Rage'', [[spoiler: Shin and Steeljaw let the Autobots and Black Knights attack the Gallia Grande, which they blow up as soon as all the heroes are aboard. ''Black Bishop's Gambit'' revealed that Lelouch suspected it to be a trap, and the heroes managed to escape via Groundbridge]].
** In ''Siege of Castle Weisswolf'', [[spoiler: the Autobots and Black Knights evacuate the castle's civilian staff after hijacking the Anti-Groundbridge satellite and tricking the Decepticons into thinking it's still active. When Shin and Steeljaw's forces then fully invade the castle, the heroes pull back and blow up the castle, wiping out most of the Decepticon and Order of Michael soldiers]].

* NotQuiteDead: In ''Siege of Castle Weisswolf'', Shin and several Decepticon officers are left to an UncertainDoom when [[spoiler: the castle is collapsed on them]]. Two chapters later in ''A United Front Facing the Dark Horizon'', it's shown that they all survived [[spoiler: though Shin was left heavily maimed]].

** Shirley notes the similarities between herself and Jean, specifically how they're both blindly loyal to someone they love who doesn't love them back, [[spoiler: in order to get through to Jean and [[TalkingTheMonsterToDeath talk her into a]] HeelFaceTurn]].

* OneHeroHoldTheWeaksauce: Combiners like Devastator and Bruticus usually end up as DumbMuscle due to the MentalFusion of all the component minds, but [[spoiler: Hercules]] is exempt from this because [[spoiler: its components are human-piloted Knightmares and the pilots' minds are only synchronized via Leila's Geass, not merged]].

** He does it to them again in ''Siege of Castle Weisswolf'', [[spoiler: letting them attack the castle after it's been evacuated and then blowing it up once all their forces are inside]].
** Lelouch unfortunately then ends up on the receiving end of this in ''War on Geass'' when [[spoiler: Shockwave anticipates his plan to assault the Geass Order and the Thought Elevators, setting traps at each location]].

** The Deceptions would rather [[spoiler: conquer China by force rather than be allied with it through an arranged marriage between Schniezel and Tianzi]], but marriages are cheaper than a war of conquest.

* SeeYouInHell: Airachnid says as such to Kallen and Arcee [[spoiler: right before they kill her]].

* ShutUpHannibal: Kallen interrupts Airachnid's [[spoiler: final]] rant at Castle Weisswolf by grabbing her by the face and telling her to shut up, [[spoiler: right before killing her]].

* StormingTheCastle: In ''War on Geass'', the Autobots and Black Knights launch simultaneous attacks on the Geass Order's headquarters and the Thought Elevators in order to destroy them all. [[spoiler: Unfortunately, Shockwave anticipates this and sets a trap.]]

** Steeljaw's Pack reacts this way when [[spoiler: the Black Wyvern Knightmares merge into a Combiner]].

* ThrowingOffTheDisability: [[spoiler: Chapter 30 has both Nunally walking under her own power, without any cybernetic casts, and Bumblebee getting a new voice box thanks to the Forge of Solus Prime.]]

** [[spoiler: The Dark Star Saber is destroyed by Zero Prime, Lelouch resurrected by the Power of the Primes, with the Star Saber.]]

** It's never explained why Trypticon was searching for the Iacon Relics when he was awakened in ''Flying Mind'' beyond Megatron having made it his mission. Here, Ratchet and Lelouch theorize that he wants the relics because one of them might be able to restore his robot form (with both noting that the Forge of Solus Prime is likely capable of doing so, though even if he ''found'' it he would be unable to use it because only a Prime can do that), though it's never really confirmed.

** Odysseus, who was confirmed to be killed when Schneizel destroyed Pendragon with a FLEIJA, [[spoiler:survives thanks to Thundercracker and Steve helping him, Laila and Carine escape Darkmount before the start of the final act.]]

* AdaptationalModesty: The first scene of C.C. in Lelouch's house, specifically the one where she decides to sleep in Lelouch's bed (and forces him to sleep on the couch) implies that she isn't wearing anything under her straight jacket. Here, she ''is'' wearing underwear [[DownplayedTrope (which doesn't cover much, if the narration is anything to go by).]]

* BigScrewedUpFamily: Reconstructed. The Zevon family was a mess because the allure of being close to power through Charles's black ops team Pluton drove Oiagros to kill his sister for the position of head of the family. Then as part of the fallout, Orpheus was given away, and Oldrin ended up being traumatized by the murder. Oldrin then went into counterterrorism as a way to ensure she could fight Oiagros again in the future, while Orpheus ended up losing his love due to Oiagros wrecking his life going after Marrybell's sister. Sounds like a recipe for disaster right? Well, it turns out being separated was great for giving each of these members context for their family's actions and to build lives apart from that. Oiagros ended up having a HeelRealization and [[spoiler: became Wizard to resister Britannia in secret]]. Oldrin found love and began to repair her personality as a defender of innocents. And Orpheus ironically enough joined Peace Mark to fight against the greater structural problems that hurt his family too. So that by the time all of them are reunited to fight the Decepticons together, they may be strangers or angry, but they now see that they have a REAL family to rebond over rather than the mess that was created.

* DisneyVillainDeath: During the battle in ''Damocles Rises'', [[spoiler: Underbite]] gets kicked off of the Ark, falling to his death.

* DumbassHasAPoint: Tamaki is the first to realise that in addition to Cybertronians, Tox-En could have a negative effect on Knightmares since they also run off Energon.

* WreckedWeapon: Grimlock loses both his sword and shield to Megatron's [[spoiler:Dark Star Saber]].

* SparedByTheAdaptation:
** [[WordOfGod The author]] has explicitly stated he has no plans to kill Shirley off at any point in this story. He's also confirmed Cliffjumper will be alive, at least for the immediate future. The end-of-chapter notes for ''Diverging and Intersecting Paths'' adds Euphie to the list of people the author intends to spare.[[invoked]]
** Sadly PlayedForDrama in Chapter 17, as [[spoiler:(while he did survive Narita) Shirley's father is found by Soundwave and Shockwave and taken aboard the ''Nemesis''. And because only his lab coat with his family name was the only thing they could find, he is presumed dead by Shirley and her mother.]]
** [[spoiler:The [=JLF=] survives the Battle of Port Yokosuka,]] as Lelouch has no interest in deposing them to obtain political support since he has the backing of the Autobots. In fact, they end up joining the Black Knights.
** [[spoiler:As opposed to having his Code taken by Charles and dying from fatal injuries, V.V. outlives his brother, who's killed by Megatron. Of course, it is left in the air how long that will last.]]
** [[spoiler:Naomi Inoue survives the Black Rebellion, [[AnArmAndALeg although she loses her right leg during the battle]].]]
** [[spoiler:Kirihara and the other Heads of Kyoto also survive the Black Rebellion, and are last seen with Diethard, Orpheus Zevon, and Wizard watching Megatron's speech.]]

* SparedByTheAdaptation: An example for a [[spoiler:WreckedWeapon. With the addition of the Skyboom Shield, Optimus's fight with Megatron and his new Dark Star Saber doesn't end with the original Star Saber being shattered]].

* TheReasonYouSuckSpeech: Oh yes, plenty.
** In Chapter 8, Dreadwing gives a short and swift one to the Purebloods for their actions regarding Clovis's death and Suzaku's trial. Namely; framing Suzaku for killing Clovis just because he was the son of Japan's previous Prime Minister and for plotting to do away with the Honorary Britannian system. Along with turning against each other just because of the 'Orange' rumor.
** Lelouch gives one to Kusakabe and his splinter JLF faction holding the hostages at the Lake Kawaguchi hotel, not only for [[HeWhoFightsMonsters becoming no different to Britannia]] but allowing themselves to be played as a ploy by Starscream's plot to destroy the Autobots and Black Knights.
** Megatron sends Mao's plans crashing down with one in Chapter 23 when he makes him Shockwave's newest experiment for failing him one too many times.
** Kallen delivers one to Suzaku in Chapter 28, impressing on him that for all his idealism, Britannia and Decepticons will never change, the only way to resist them is combat, and Suzaku is a fool and a coward for allying with them.
** Starscream gives an epic one to Suzaku and the Britannians ([[BigotryException except Schneizel]]) in Chapter 28, calling the former out for ignoring his authority and disobeying orders, and the latter for their bickering, infighting, and pointlessly obstructive behaviors.
** Megatron gives one to [[spoiler:Charles in Chapter 34, brutally dismantling his former student's hypocrisy and infantile motivations behind the Ragnarök Connection.]]

** ''One Shall Fall'' has the final additions to the body count be [[spoiler:Oscar, Oiagros, Ravage, Laserbeak, Soundwave, Shockwave, Shin, and Megatron. The comatose Trypticon is finished off for good when Smokescreen destroys the Nemesis. And much like with Optimus in ''The New Prime'', Lelouch dies, but is revived thanks to the Primes and Marianne, the latter sacrificing herself in the process.]]

** [[spoiler: Tink]] is crushed by Bonecrusher colliding with his Knightmare during the fight over the Resonance Blaster.
** [[spoiler: Hong Gu, Leonhardt, and Marika]] are tragically killed off during the Battle of New Kaon, with the former shot down by Slipstream, and the other two blasted by the Damocles' fusion cannons. Once the alliance returns to Horai Island, it's also revealed that [[spoiler:Inoue, who had survived the Black Rebellion in ''R1'', Minami and Sugiyama, along with Kuzan, Alan, and Franz from the Asura Strike Force were killed by the Damocles.]]

* WeAreStrugglingTogether: The Decepticons and Britannians may both want to eliminate the Autobots and Black Knights, but they are not very good at working with each other to achieve those goals. This becomes a plot point in ''United We Stand'', as Suzaku, Airachnid, and Breakdown ultimately lose out to Kallen, Rai, Bulkhead, and Arcee because the latter four are a team and can work together despite issues involving the polarity gauntlet, while the former trio [[DividedWeFall is hamstrung by a variety of issues]] (Airachnid wants the Gauntlet for herself, Suzaku and Breakdown want to give it to Megatron, and Suzaku also wants Airachnid arrested for [[spoiler:the massacre she committed in the ghettos.]]

* StrappedToAnOperatingTable: [[spoiler:In Chapter 23, Mao is sent to "Shockwave's dissection table" for failing to obtain a piece of C.C. as a specimen to study Geass.]]

* StrappedToAnOperatingTable: [[spoiler:Mao's fate after Chapter 23.]]

* ThouShaltNotKill: {{Downplayed|Trope}}. Optimus is relaxing the rules due to the fact Britannia has the technology to fight the Autobots on equal footing, plus some of the Britannians being just as evil as the Decepticons. [[WouldNotShootACivilian Civilians are still off-limits]].

* TheUnintelligible: Bumblebee, as has become the standard practice of late. For the sake of the audience, whatever he says is bracketed, letting us know it is something only other Cybertronians can understand. Lelouch and the Black Knights eventually get earpieces to translate what the Autobot scout says. C.C. can perfectly understand him without it though, much to everyone's shock.

** [[spoiler:V.V.]] throws a complete temper tantrum when he senses [[spoiler:Optimus Prime destroying the Kamine Island Thought Elevator.]]
** Suzaku has one in Chapter 32 [[spoiler:when he learns that Lelouch is Zero, and Megatron kidnapped Euphemia and replaced her with a Pretender to spark the SAZ Massacre. [[NeverMyFault He blames Lelouch and the Black Knights]] for [[InsaneTrollLogic choosing to fight against Britannia and the Decepticons.]] When Lelouch makes it very clear to Suzaku that he's on the wrong side of this conflict and needs to stop blaming others for his own mistakes, Suzaku ends up punching Lelouch and asking him to just [[DeathSeeker let him die already]].]]

*** For Britannia, even though they don’t know about the Autobots yet, it shows that despite their superior technology to the rest of the world, they still lag behind the Cybertronians. For while the Lancelot is the most advanced Knightmare Frame in existence, and Suzaku is a talented pilot, his lack of experience allows Bumblebee to fight the Lancelot to a standstill.
*** For the Autobots, it shows that the fight against Britannia will not be an easy one. Despite Bumblebee being a sentient MechanicalLifeform TransformingMecha, the Lancelot’s superior technology compared to other Britannian Knightmare Frames, combined with Suzaku being a talented pilot, allows it to go toe to toe with the young Cybertronian.

* WatchingTroyBurn: The prologue opens with the Autobots forced to leave the dying Cybertron, then the canonical events of ''Code Geass'' happen and Japan is conquered by Britannia...[[spoiler: and the Decepticons force the royals to watch as they blast the royal palace into the smithereens]].

* YouMonster: When Megatron finishes [[spoiler:explaining his Dark Geass and how it will gradually kill Lelouch]], C.C. calls him the Devil Incarnate. [[InsultBackfire Megatron simply asks if she was only now realizing that.]]

** Happens in Chapter 5 when the Autobots and Zero free Suzaku from Britannia. To add insult to injury, the Autobots win without even killing a single Purist.
** This is something of a RunningGag with Cornelia, as she tends to get defeated with almost laughable ease.

** Suzaku deconstructs the IdealHero and BlackAndWhiteMorality, as his inability to acknowledge his cause as wrong or see exactly how evil Megatron is ultimately setting him down a darker path and progressively leads to him becoming more villainous as time goes on... Which is EXACTLY what Megatron wants.

** The Glaston Knights deconstruct EliteMooks - while they're incredibly powerful Britannian Knightmare Pilots, [[spoiler:they're still nowhere near the Autobots' level, and are ultimately little more than RedShirts against such powerful opponents.]]

* DeducingTheSecretIdentity: Soundwave deduces Zero's real identity early in the story after Laserbeak records Lelouch holding the Zero mask, comparing Zero and Lelouch's voices and when they perfectly match, he then compares his name to the records they have on the Royal Family and realizes they match with Lelouch vi Britannia. Megatron is both surprised and pleased when he finds out, but keeps it between the two and later Shockwave so someone, [[BosssUnfavoriteEmployee like Starscream]], doesn't do anything reckless with the information.

** This happens again in Chapter 30, where the Black Knights come to the aid of Suzaku during the Battle of Kyushu. [[AdaptationExpansion This time, though, the forces present include]] [[spoiler:virtually all of the Autobots on Earth at the time, Dreadwing, four members of the Knights of the Round, and the Guren and Pre-Production Gekka.]]

** Dreadwing is trickier since he has no obvious weaknesses, but Lelouch ultimately settles on having Wheeljack distract Dreadwing so that Urabe can attack from behind.
*** At which point Wheeljack will disable the Florence by cutting off its arms (removing its weapons) and legs (to fully incapacitate it).
*** And then have Urabe and Wheeljack team up against Dreadwing.

* HorrifyingTheHorror: [[spoiler:V.V. is an immortal Code Bearer that has committed countless atrocities to serve his brother's plan, but after being tortured and killed multiple times by the Decepticons and finally killed by Megatron's [[SupernaturalFearInducer Dark Geass of Absolute Terror]], when he comes back to life, he swears his loyalty to Megatron, too terrified to resist.]]

* InternalReformist: Suzaku, as in canon, strives to be this for Britannia, though he faces stiff resistance from the Britannia, while the Decepticons who are nominally helping him toward that goal believe his plans are naive. [[spoiler:Chapter 29 reveals that Suzaku finally realizes that such a goal is impossible and that he chose the wrong side in the conflict for Earth]].

* ALighterShadeOfBlack: This is {{ZigZagged|Trope}} to hell and back between Britannia and the Decepticons. The Holy Britannian Empire is shown to be a classist and racist imperial power [[VillainWithGoodPublicity that tries to paint itself as Holy and Just]], but they aren't willing to needlessly sacrifice their own, care about civilian casualties ([[FantasticRacism if said civilians are their own, of course]]), and have several members who acknowledge the flaws of their faction and are trying to reform it from within. The Decepticons, meanwhile, are unapologetic {{Galactic Conqueror}}s who have no problem sacrificing their own for trivial reasons and committing genocide against their enemies but are also a pure meritocracy that only factors in loyalty and personal skill when considering advancement, [[AtLeastIAdmitIt and have no pretensions about being villains]]. [[spoiler:Ultimately, Britannia comes out as the better party in the aftermath of the SAZ Massacre, as while many gleefully participated in the slaughter, several tried to halt it and are horrified by the results. By contrast, not only did the Decepticons cause said catastrophe and graciously sped it along, the only member of the Cons who tried to stop it, Dreadwing, ends up defecting after learning the truth]].
** [[spoiler:And in the end, Megatron invokes EvilerThanThou when he executes Charles and causes the chapter's titular ''Fall of Britannia''.]]

*** Related to this is the theme of redemption. Many of the heroes are working to live past their mistakes and past assumptions. But as part of the AdaptationalHeroism present through the story, many of the britannians who were complex enemies of canon instead are given a chance to make it all right. To truly work to atone for everything whether they deserve it or not, and find a home in the greater family that the Black Knights became.

* RayOfHopeEnding: The ending for ''R1'' is this. By the end of the first story [[spoiler:Megatron and the Decepticons have essentially destroyed Britannia and begun their conquest of the entire world, with over half of the Black Knights being killed in battle and Cliffjumper and Dreadwing [[HeroicSacrifice sacrificing themselves to protect their friends]]. However, despite this victory, the remaining Black Knights and Autobots rally together. Joined by several defectors from Britannia, and the Ashford Student Council, they plan to lay low for a while and rebuild their forces, and they managed to piggyback off Megatron's message to bring all remaining Decepticon forces to Earth and send their own message to bring any scattered Autobots across the universe to Earth so they can join their fight against Megatron. C.C. also forms a contract with Optimus, giving him his own Geass so he can even the playing field against Megatron and his Dark Geass]].

''Code Prime'' is also seen as an IntercontinuityCrossover from both ''Code Geass'' and ''Transformers'' as characters and elements from other continuities, such as ''[[Manga/CodeGeassOzTheReflection Oz the Reflection]]'' and ''[[WesternAnimation/TransformersRobotsInDisguise2015 Robots in Disguise]]'', are included. The first entry in the series is ''[[https://www.fanfiction.net/s/13151821/1/Code-Prime-R1-Rebellion R1: Rebellion]]'', which began on December 19, 2018. It was completed on November 22, 2020 with 36 chapters. The sequel ''[[https://www.fanfiction.net/s/13795604/1/Code-Prime-R2-Revolution R2: Revolution]]'' began on January 15, 2021, and is set to end in September-October 2023 at 38 chapters. On June 28, 2023, the author announced that there would be an R3, but also confirmed that he will be taking a brake from the story to focus on other projects.

''Code Prime'' is also seen as an IntercontinuityCrossover from both ''Code Geass'' and ''Transformers'' as characters and elements from other continuities, such as ''[[Manga/CodeGeassOzTheReflection Oz the Reflection]]'' and ''[[WesternAnimation/TransformersRobotsInDisguise2015 Robots in Disguise]]'', are included. The first entry in the series is ''[[https://www.fanfiction.net/s/13151821/1/Code-Prime-R1-Rebellion R1: Rebellion]]'', which began on December 19, 2018. It was completed on November 22, 2020 with 36 chapters. The sequel ''[[https://www.fanfiction.net/s/13795604/1/Code-Prime-R2-Revolution R2: Revolution]]'' began on January 15, 2021, and is set to end in September-October 2023 at 38 chapters.