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"Say goodbye to the universe, Maximals! The future has changed. Yes. The Autobots lose! Evil triumphs! And no longer exist!"
Megatron, after trying to murder Optimus Prime and rewrite history, Beast Wars, "The Agenda, Part 3"

Ever since the 1980s, the Robots in Disguise have faced various threats, both on Earth and from the farthest reaches of the galaxy. Here are the worst of the worst.

All spoilers are unmarked. You Have Been Warned!

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Generation 1

Generation 1 cartoon continuity
  • The Movie: Unicron is an ancient, planet-eating Transformer that was created by Primacron. Primacron created Unicron to help him take over the universe, but he rebelled and destroyed Primacron's lab. Unicron travelled through space and devoured many inhabited worlds, including the planet of Lithone. After learning of Optimus Prime's death and his passing of the Matrix of Leadership, Unicron tracked down Megatron and tasked him to destroy it, as it was the only thing that could stand in his way. Torturing Megatron into accepting his deal, Unicron reformatted him into Galvatron and made him more susceptible to his psychic assaults. Galvatron, tired of being Unicron's pawn, tried to use the Matrix to turn Unicron into his slave, but it had no effect in his hands. In retaliation, Unicron started destroying Cybertron and attacked both Autobot and Decepticon alike. Unicron was eventually defeated by a Matrix-wielding Rodimus and only his head remained to orbit Cybertron, a testament to the Transformer that made even the mighty Megatron beg for mercy.
  • Super-God Masterforce & Legends: Devil Z is the Decepticon Emperor. Stealing 8 Transtectors to create an army of humans merged with the power of Transformers, Devil Z later intended to cast aside the Godmasters as tools. Straight up Desecrating the Dead and later torturing his minions, Devil Z happily resorts to blaming his minions when he makes an error or miscalculation. Later when humanity proves themselves to be unpredictable, Devil Z decides that humanity is an existential threat and that he must Kill All Humans. When his own subordinates think he is going too far, he kills them without hardly a second thought, and displays absolutely no remorse for his actions. After his defeat, Devil Z returns in Legends, where he would try to kill every living thing in the Legends World so he can use all of their Shinchōkon energy to become powerful enough to conquer other universes.
  • Unite Warriors: Unicron returns and tries to get a new body. Meeting up with Galvatron's ghost and Cyclonus, Unicron made a deal with them to give them a new body as Grand Galvatron by summoning several other Transformers from throughout the multiverse to be their components so they can conquer Cybertron for him. Eventually allying himself with Mega-Octane and the Commandos from the future, Unicron managed to get his head attached to Cybertron, possessing the entire planet. Unicron then betrayed the Commandos, revealing his plan to wipe out all of the Transformers, including them. As he summoned numerous beings across different dimensions and timelines, Unicron cracked the dimensional barriers and threatened to cause the entire multiverse to collapse.

Marvel Comics continuity

  • The Transformers:
    • Unicron is a powerful planet-eating Transformer and the Arch-Enemy of Primus, the creator of the Cybertronians. After destroying the old realms that existed before the current multiverse, Primus stopped Unicron's quest to consume all of existence again by trapping him within a lifeless asteroid and left to wander aimlessly through space. When Primus was shot during a fight between the Autobots and Decepticons, Unicron heard his rival's scream of pain and made a direct path towards Cybertron. Stopping to devour the planet of Ghennix and its roughly 60 billion inhabitants, Unicron reformatted three of its survivors to be his new heralds. After sending them to retrieve Galvatron from the future, Unicron tortured him in order to gain his compliance. Unicron distracted Primus's forces by unleashing his sleeper agents that were planted within Cybertron's population millennia ago. Once he finally arrived, Unicron devastated Cybertron and claimed countless lives, including Primus's. Unicron's rampage left lasting scars on the planet's surface and truly earned him the title of the Chaos Bringer.
    • Lord Straxus is a brutal Decepticon warlord who took over Cybertron after the departure of Megatron. During his reign, Straxus would have his troops round up any Cybertronian who did not pledge loyalty to the Decepticons and subject them to his smelting pools, where they would be melted down for spare parts while they were still alive. Upon receiving a transmission from Earth, Straxus had the neutral scientist Spanner kidnapped so he could build a space bridge for him. When the bridge started malfunctioning, Straxus sent men after men to their deaths because he was too impatient to figure out what the problem was. He would then forcibly reconfigure Spanner's body to become part of the space bridge, leaving him in constant pain and begging for death. After being reduced to a severed head, Straxus intended to swap bodies with Megatron and crush him in his helpless state. When that plan failed, Straxus forcibly reformatted one of his soldiers into becoming a clone of Megatron and transferred his mind into their body. He would continue to torment the clone and eventually drove him to suicide in his attempts to take over his body. Straxus dispensed no mercy to all sides of the conflict, and promised only death to those who stood in his way.
    • UK run's issues #166-169: Flame is an Autobot scientist who was kicked out of his academy in disgrace after proposing a revival of Megatron’s plan to turn Cybertron into a mobile spacecraft. Bitter over his rejection, Flame ignored the warnings of his peers despite the danger his project posed to Cybertron. After discovering an abandoned engine room left behind by the Decepticons, Flame faked his death and continued his research in secrecy. When a test firing of the repaired engines destroyed a section of the city Kalis, Flame transmitted a signal that reanimated the corpses of his fellow Cybertronians and forced them to attack anyone who came close to the city. Flame refused to listen to the warnings of his former colleague, Emirate Xaaron, and tried to kill him when Xaaron attempted to shut down his reactor before it would destroy Cybertron. Flame showed no remorse over turning the victims of his own hubris into his zombie slaves, and only cared about restoring the reputation he deservedly lost.
  • Generation 2: Jhiaxus is the ruler of the Cybertronian Empire, but was once just another Decepticon warlord on Cybertron. Believing the war between the Autobots and Decepticons was hindering the progress of their species, Jhiaxus abandoned his sadistic ways and left Cybertron with a legion of Decepticons. He led his empire on a campaign of conquest and genocide, terraforming new worlds and wiping out any "inferior beings" that happened to get in their way. When the Autobots began attacking his outposts, Jhiaxus focused his efforts on eliminating this new threat to his empire. Declaring war on both the Autobots and Decepticons, Jhiaxus's cruel nature began resurfacing as he ordered the slaughter of numerous species to lure the Autobots out of hiding. He managed to track down the base of the Autobots and Decepticons, and sent wave after wave of his men to wipe them all out. When Optimus Prime warned him about the arriving threat of the Swarm, Jhiaxus ordered the destruction of San Francisco simply out of spite. Jhiaxus ordered a second strike that would kill his own men, and crushed the head of a soldier who suggested they retreat. Jhiaxus blamed Optimus for his empire falling apart and refused to believe he was still just as much of a petty tyrant as he was back on Cybertron.
  • Alignment unlicensed continuation, by Simon Furman himself: The Liege Maximo finally takes center stage as the final threat that the Autobots and Decepticons had to face. One of the original Transformers created by Primus, the Liege Maximo coveted its divine power and wished to become a god equal to its creator. After creating the Decepticons, the Liege Maximo left Cybertron and formed the Cybertronian empire, who were responsible for wiping out countless species during their conquests. The worlds they conquered were added to the Hub, which would open a portal that would ascend the Liege Maximo to godhood while destroying the universe in the process. After being discovered by an Autobot scout ship, the Liege Maximo ordered its fleet to destroy the Autobots and Decepticons before they could intervene with its plans. It harvested the sparks of its own followers to open the portal, and killed several more Transformers who stood in its way. Utterly indifferent to lives that suffered at its hands, the Liege Maximo embraced its dark nature on its path to godhood.
  • Regeneration One (IDW, by Simon Furman):
    • Megatron becomes far crueler and more sadistic than he was in the original Marvel series. After being reactivated by a group of humans investigating the crashed Ark, Megatron launched a campaign of slaughter in the hopes of luring Optimus Prime back to Earth. He used the Ark's systems to hack into military bases around the world, and launched hundreds of nuclear missiles to turn the planet into a complete wasteland. Megatron then turned his former Decepticon soldiers into mindless zombies and ordered them to hunt down any humans who were still alive. He kept Starscream conscious of his situation as payback for his years of treachery, and kept Ratchet's disembodied head alive due to their Psychic Link. After waiting twenty-one years for the Autobots to arrive, Megatron captured Kup and infected with him a deadly disease to use him as bait. When Optimus arrived to put an end to his schemes, Megatron ordered the rest of the world's nuclear arsenal to be launched in an attempt to kill everyone on the planet, him and Prime included. Wishing to go out in a blaze of glory and take everyone with him, Megatron became a vindictive sadist as a way to pass the time.
    • Jhiaxus was a former senator on Cybertron who saw a grander destiny for his species than the one Primus laid out for them. Wishing to create a galaxy-spanning empire under his control, Jhiaxus stole the knowledge of how to create life from the Underbase and purged all records of himself from Cybertron. Over the millennia, Jhiaxus created the Hub Network, a series of interconnected planets built on a campaign of terraforming and genocide. When he arrived on Cybertron in the hopes of adding it back to his empire, he sneered when Rodimus Prime suggested the beings he wiped out classified as life. This disregard for life was shown when his Primum Frugae slaughtered the Primordials on Cybertron for being "sub-evolved". He later revealed to Rodimus Prime his plans to reformat the Autobots into fitting his view of a "master species" and execute the rest who were "tainted" by outsider technology. Ultimately obsessed with instilling his own version of order across the galaxy, Jhiaxus showed a no remorse for countless worlds he stripped of life to build his empire.

Dreamwave series

  • The War Within: Megatronus Prime, debuting here, is known as the Fallen. Created by Primus as one of the original Thirteen Primes, the Fallen became obsessed with the notions of entropy and decay, ultimately attempting to murder his creator after betraying him to Unicron. Escaping the prison he was trapped in some seven million years before the 21st century, The Fallen visited the G1 continuity, gathered several Decepticon outcasts and kidnapped four Transformers, through which he tried to channel enough energy to break the Seal of Primus, awaken Unicron, and end all reality, boasting that his victims were but "casualties in the wars of the Gods". Sharing his master's unquenchable thirst for destruction, The Fallen is precisely the kind of servant that Unicron most needs.
  • Prime Directive:
    • General Robert Hallo was the head of military development for the United States Army. Obsessed with the idea of controlling the Transformers, Hallo had Adam Rook create a program that could remove the free will from Transformers, and hatched a plan to blow up the Ark II and gain a new robot army. After killing a man who attempted to blow the whistle on the plan, Hallo successfully destroyed the Ark II, killing all the humans on board and sending the Autobots and captured Decepticons into the Arctic Ocean. However, Adam decided to keep the program for himself, and disappeared not long after. Years later, Hallo convinced Spike Witwicky to revive Optimus Prime, but when Optimus refused to follow Hallo's orders, both Autobots and the Decepticons hit with an air strike, intending to kill them all, which failed and led to an enraged group of Decepticons rampaging through San Francisco. To be rid of the Transformers once and for all, Hallo ordered the city to be nuked, and when Spike burst in to stop him, Hallo holds him at gunpoint and forces him to watch as the city and Transformers are destroyed.
    • Adam Rook, aka Lazarus, is just as bad. After designing a program that would remove the free will from Transformers, Adam decided to render the deaths of everyone aboard the Ark II meaningless by stealing the program and disappearing before Hallo had a chance to use it. Motivated by greed, Adam took the name Lazarus and built a criminal empire, using the program to force Transformers to work for dictators and terrorists, helping them stomp out their enemies without casualties on their side. He even forced good guys like Bumblebee, Ratchet and Ironhide to work for killers. Sometimes, he would take "customers" on tours of his base, and would make the Transformers kneel to him to show his power over them. After three years of running this successful criminal empire, Lazarus had a group of Transformers slaughter an oil refinery in the Arctic as a demonstration to potential buyers, and casually began auctioning off all of them not long after.

2005 IDW continuity

  • Bludgeon, debuting in Stormbringer, is the leader of a nihilistic cult and a former Decepticon war criminal. Trying to awaken Thunderwing, Bludgeon attempts to unleash him upon countless worlds to erase them of life. Eventually falling in line with Shockwave, Bludgeon liberates Jhiaxus on his behest, butchering Wheelie and Garnak in the process, and aids Shockwave in his grand, universe-destroying plans. Returning later when confronted by the Dinobots, Bludgeon performs horrible experiments upon sparks and Transformers to twist and mold them into monsters, while attempting to awaken and control the monstrous Trypticon to go on a killing spree. Later switching allegiance to Unicron, Bludgeon happily intends to spread the destruction of the Chaos-Bringer across existence to consume all in their path. A psychotic nihilist with a fetish for destruction, Bludgeon ranks as among the worst of the Decepticons.
  • Nova Prime, debuting in Escalation, is a self-concerned megalomaniac who ascends to Primehood following the abdication of the Thirteen Primes, "uniting" Cybertron and oppressing Cybertronians with "lesser" alt-modes under his banner. Plotting the conquest of the universe and the oppression of all other life forms, Nova had Jhiaxus conduct twisted experiments on six "beast" Cybertronians, turning them into the horrifying Monstructor. Leaving Cybertron aboard the Ark-1, Nova deliberately ordered his crew to fly into a portal to the Dead Universe in order to satiate his own ego. From there, Nova plots to merge the Dead Universe with the "living" one, destroying all life in the process, allowing him to both return home at long last and ascend to godhood. Returning in Dark Cybertron, Nova kills the Autobot Hardhead by exposing him to the Dead Universe and intends to use Orion Pax, Rodimus and Cyclonus' sparks to power Kup's spacebridge, uncaring that this will kill them all.
  • Overlord is without a doubt one of the vilest Decepticons to ever grace the organization's ranks. An easily bored sadist with a love for bloodshed and fighting known for tearing through battlefields with glee, Overlord developed a pathological fear of defeat and hatred of Megatron when the latter defeated him in combat, and dedicates his life to destroying Megatron for the insult. Taking over Garrus-9 and turning it into a hellish concentration camp after killing several of his own allies, Overlord tortures and butchers hundreds of Autobots in various creative ways, hoping to lure Megatron out with his sheer depravity only to order the 50 surviving Autobot prisoners executed when his plans for Megatron are foiled. Overlord later horribly dismembers and kills the Autobot Rewind, mocking his spouse with Rewind's final moments of agony, and endorses a war campaign that leads to widespread slaughter before ditching his allies. In his final appearance, Overlord teams up with Tarantulas, disguises himself as a human, and spreads warmongering ideology against his own species—trying to torture the human girl Verity to death during this venture as payback for thwarting him on Garrus-9—while planning to travel to countless alternate timelines and kill Megatron over and over before murdering Tarantulas when he tries to explain that Overlord's plans will shatter the timestream and lead to countless deaths.
  • More Than Meets the Eye (includes Lost Light):
    • Pharma was a former Autobot medic at a medical facility on the planet Delphi whose evil began when he killed bots for their organs to bribe an elite Decepticon unit. To cover up his crimes, he has two other Decepticons unleash a plague on the facility to kill everyone. Pharma shoots a life-support when revealed, sending about 20 patients into near-death states, then tries to kill Ratchet twice before being thrown off the facility. When he finds Ratchet again, he separates Ratchet's head and spark from his body and starts torturing him. To prove he is a better medic, he has Ambulon, one of his co-workers from Delphi, sliced vertically in half with a chainsaw and tells Ratchet to fix him, despite Ambulon already having died in agony.
    • Froid is a former rival and friend of Rung who aids in brainwashing dissidents of the corrupt Cybertronian Senate and makes a deal with Sunder, offering to provide victims in return for Sunder aiding Froid in his research. Using Sunder to become wealthy and famous through the latter's ability to read memories, Froid secretly gives innocents for Sunder to kill. Froid boards the Lost Light to seek new victims for Sunder and tries to blackmail Rung—whose work he plagiarized—into giving Froid his patient files, releasing Sunder upon him as a distraction to escape when Rung refuses. Later, Froid nudges the Autobot Getaway's darker impulses for his own perverse curiosity, leading the latter to sacrifice some of his crew to Sunder.


  • Kid Stuff storybooks: Megatron is the power-hungry leader of the Decepticons, who is obsessed with amassing enough power to conquer the entire universe. Upon arriving on Earth, Megatron tricked thousands of humans into working for him, promising to award them with great profit only to destroy them all in a massive explosion after they were done gathering coal for him. The detonation also turned the coal into a large diamond, in which Megatron used as a lens laser to melt the Rocky Mountains, killing even more people in the process. As the series progressed, his body count would only get higher as he tried to obtain massive amounts of oil through methods that caused several worldwide disasters.
  • Transformers in 3-D issue #3—"The War Against the Destructons, Chapter 1 of 3": Lord Imperious Delirious is the leader of the Destructons who was sealed away in a dimensional barrier for nearly destroying the galaxy. Eons later, the Destructons were freed by an Andegean scientist, with Lord Imperious Delirious thanking him by saving him from the Kalkar soldiers and then proceeding to annihilate the scientist himself. The Destructons quickly got into conflict with the Autobots, killing Kup in the process. With the Destructons threatening to destroy the entire universe, Lord Imperious Delirious proved to be a threat great enough for the Autobots and Decepticons to make a truce to stop him.
  • Beast Wars (connected via Broad Strokes):
    • Megatron is a self-proclaimed tyrant and would-be Galactic Conqueror. A user and abuser of his followers, Megatron divides the world into enemies and pawns, killing or enslaving the former, and ruthlessly exploiting the latter. His more notable crimes include extracting half of Rampage's spark, placing it in a vise, and using it to torture Rampage into submission; attempting to order Dinobot to kill Quickstrike, one of Megatron's relatively more loyal soldiers, after Quickstrike lost to Dinobot in a sort of re-entrance exam into the Predacons; an aborted genocide of humanity's common ancestor; attempting to rewrite all of his history by killing the original Optimus Prime; and, finally, sacrificing all his remaining troops in order to gain control of the Nemesis and set out to overrun the galaxy. His defeat doesn't stop him either—when he returns in Beast Machines he's gotten worse, picking up a serious god complex along the way. Seizing control of Cybertron, Megatron extracts the sparks from everyone on the planet, reducing them to mindless drones. Acquiring a hatred of all organic life, Megatron tries to scrub Cybertron clean of it, resulting in the near-destruction of all life, robotic and organic, on his home planet when his last mad grasp for power finally fails.
    • Tarantulas is a schemer and backstabber second-to-none. Planted as The Mole in Megatron's operation by the Predacon Secret Police, Tarantulas is a cackling Mad Scientist, who enjoys performing gruesome experiments on his victims, and eating anything or anyone he catches in his giant webs, organic or robotic; he admits to enjoying the act itself more than the meal. He brainwashes several Maximal protoforms into becoming Predacons, most notably Blackarachnia and Inferno, and eventually reveals that he hopes to usurp control of the team from Megatron. Tarantulas later exploits and Mind Rapes Blackarachnia, leaving her with a paranoid terror of him, and later swears a vendetta against her, promising to hunt the other spider down and kill her for daring to defy him. He tries to destroy the Ark, which would create a time paradox and lead to the extinction of the Transformers as a species. Ultimately betraying both sides, Tarantulas is revealed to be descended from neither Autobot nor Decepticon, and he attempts to use Vok technology to wipe out all factions, swearing that when he's done with his own species, he will return and commit genocide against the Vok themselves. Void of loyalty or conscience, Tarantulas makes even his own nominal allies uneasy, a fact that he is downright proud of.
  • Alternity Prose Fiction: Megatron, upon being awoken from his stasis lock, finds out that the Autobots have evolved into a hyperdimensional race known as the Alternity. Wanting to achieve this level of power for himself, Megatron enslaved and absorbed the powers of the Hytherion, before going on a rampage and destroying numerous galaxies. After the destruction he caused was continuously reversed by the Alternity, Megatron set his sights to wipe them out and conquer the entire multiverse.
  • Devastation: Megatron is the ruthless leader of the Decepticons, who waged war against the Autobots for millions of years, leading to his own homeworld Cybertron becoming uninhabitable. Constantly trying to take over Earth, Megatron soon discovered the Autobot ship Proudstar, which was designed to cyberform uninhabited planets and started to cyberform New York City. Taking over that ship, Megatron creates a plan to use its Ferrotaxis supercomputer to speed up the process and cyberform the entire Earth, killing all organic life on it, which he openly considers inferior. Repeatedly thwarting the Autobots' attempt at stopping the cyberformation process, including launching unstable core of the ship outside of New York, which could have caused an extinction-level explosion, Megatron shoots Ferrotaxis into space to keep the Autobots from getting it. When Optimus Prime managed to reach it, Megatron battles him, openly announcing his intention of creating the new Cybertron and retaking the galaxy in a bloody conquest.
  • Prime Wars Trilogy:
    • Overlord is a powerful Decepticon warrior who's been holding a grudge against Megatron after he became the only Transformer to beat him in battle. When Megatronus Prime offered him a chance to gain his revenge, Overlord happily assisted him in his plan to harvest the sparks of all Cybertronians. Overlord murdered the Mistress of Flame in his quest to find Megatron and forced Hot Rod to become the new host of the Matrix of Chaos. Overlord and Rodimus Cron violently interrogated any Cybertronian for Megatron's whereabouts. He forced Menasor to watch as Rodimus shot off Devastator's limbs and snapped his neck once he got the info he needed. Once he found Megatron, Overlord promised he would make him suffer by making his death as slow as possible. Willing to help commit genocide to settle old scores, Overlord is a petty sadist who can't stand the shame of defeat.
    • Unicron was once a powerful planet-eating Transformer who was destroyed by the Thirteen Primes after he attempted to devour Cybertron. Reduced to a disembodied head in space, his consciousness was contained within the Matrix of Chaos. When Megatronus planned to harvest the sparks of every Cybertronian, Overlord chose Hot Rod to become the host for Unicron's power. Now going by Rodimus Cron, Unicron assisted Overlord in torturing other Cybertronians and executed Devastator and Sludge in cold blood. After killing Victorion by ripping off her head, Unicron taunted Windblade by claiming that the Hot Rod she knew was dead. Once he learned Megatronus had the Matrix of Leadership, Unicron took full control over Hot Rod and planned to destroy the last of the Primes. When Optimal Optimus removed the Matrix of Chaos from Hot Rod's body, Unicron attempted to possess Megatron and force him to kill his allies. A god only wanting to be feared, Unicron sought only to destroy the legacy of his rival Primus.
  • War for Cybertron Trilogy:
    • Earthrise & Kingdom: Galvatron is the future version of Megatron, orchestrating Megatron's harshest fall into villainy for his own purposes. Having rose to power through genocide and cruelty, Galvatron was turned into a slave by Unicron and, in his attempts to avoid this fate, travels to the past and encourages his younger self to embrace his sociopathic selfishness and kill all in his way. Masterminding a massive war between the Autobots, Decepticons and their allies that claims countless lives, Galvatron intends to steal the Allspark and leave Cybertron and all Transformers to die in his wake, uncaring of anyone else so long as he destroys Unicron and secures his destiny of power.
    • Siege & Earthrise: Shockwave is a cold, clinical scientist and the wickedest of Megatron's inner circle, with no crime he considers beneath him. Researching the history of Cybertron, Shockwave discovers the power of the mythical Allspark and reveals to his master a devious plan: to use its power in order to spread a virus in order to forcefully reformat all Autobots into Decepticons, turning them into mindless slaves, and steers his boss into using this plan. After the Decepticons capture Ultra Magnus, Shockwave electrically tortures him until his body starts to break apart from the pain and sheer force. With Magnus's death, Shockwave uses his body as way to cultivate and release a computer virus which will wreak havoc on the Autobots communications, despite the fact that it would lead to chaos all across Cybertron. Shockwave later lures in and sacrifices hundreds of Decepticons to use their bodies and sparks as raw parts to build the spaceship Nemesis while secretly devouring several sparks himself to increase his power for his plans.

Film Series

Original continuity
  • 2007 film:
    • Console video game: Megatron is the leader of the Decepticons, who waged war on his home planet Cybertron, resulting in it dying and all surviving Cybertronians being forced to flee from it. In search of the Allspark, Megatron came to Earth and got frozen in the Arctic. In the Decepticon campaign, Megatron, immediately after getting freed, orders his Decepticons to hunt down and kill all the Autobots. After they killed all of the Autobots aside from Optimus Prime, Megatron started to destroy a city, simply as a way to lure Optimus Prime out. Succeeding at that, Megatron managed to kill Optimus Prime and get his hands on the Allspark, invading the Earth and exterminating humanity, before proclaiming that he is finished with Earth.
    • DS video game: Megatron lacks his film counterpart's nobler traits and replaces it with raw brutality. Having plunged Cybertron into civil war after killing his own father, Megatron tore out Bumblebee's vocal processor when he launched the Allspark into space. He followed the Allspark to Earth, but wound up frozen in the Arctic Circle. After being thawed out by his followers, Megatron's murderous rage was only tempered when they planned to blow up Hoover Dam and drown thousands of people. In Autobots, Megatron used the Allspark to terrorize the city of Tranquility and mortally wounded Create-A-Bot while trying to kill his own brother, Optimus Prime. In Decepticons, he tracked down and murdered Jazz after he foiled his plot to destroy Hoover Dam. After terrorizing Tranquility, Megatron killed Optimus and hunted down his traitorous lieutenant Starscream. Create-A-Con was gravely wounded after helping him defeat Starscream, and Megatron chose to kill him rather than waste resources trying to repair him. Megatron showed no remorse for the Decepticons who gave their lives for him and believed that the weak were only meant to serve the strong.
  • Revenge of the Fallen:
    • The film: The Fallen, also known as Megatronus Prime, is this film's Big Bad and the film universe's first Decepticon. Originally one of the 7 members of the Dynasty of Primes, The Fallen betrayed his brothers and attempted to use the Star Harvester on Earth's Sun regardless of the Dynasty's code against taking life, solely because of his Fantastic Racism towards primitive humankind. Eons after his defeat, The Fallen corrupts Megatron, creates the Decepticons, and orders him to find the All Spark, making him responsible for the events of the first film. After he lures Optimus Prime to his death using Sam as bait, The Fallen sank an aircraft carrier, attacked several human cities, and slaughtered a sizable military force while acquiring the Matrix of Leadership to activate the Star Harvester again, fully intending to wipe out the human race.
    • IDW comic: The Fallen himself is portrayed as even worse than his film counterpart. Once a member of the Thirteen Primes, The Fallen came to believe he was destined to become the most powerful of his brothers by re-powering the Allspark, then using it to make himself all powerful. Using the Star Harvester, The Fallen drains the energy from a sun, uncaring that it leads to an entire planet dying, and blames it on one of his own servants when confronted about it. After attempting to use the Star Harvester once more, The Fallen comes to the realization that he no longer needs his Prime "brothers" or the Allspark, prompting instead to travel the universe searching for sapient life, then slaughtering countless worlds of their sapient species, absorbing the knowledge, weapons, and strategies of the billions he slays as he goes along. After butchering his Prime brothers, The Fallen attempts to use the Star Harvester to wipe out the entire Earth, taking extra time to crush humans underfoot while laughing. Though sealed away for thousands of years, The Fallen continues his wicked ways, as he reaches out and corrupts the noble Megatron into waging a war against Optimus Prime and the Autobots, leading to countless deaths and the destruction of Cybertron itself. The Fallen hopes to return to Earth and use the Star Harvester to destroy it for good this time, solely as a final act of spite toward his brothers.
    • PS3/360/PC video game:
      • The Fallen is the original Decepticon and one of the 13 original Primes, who betrayed his "brothers" by slaughtering them for refusing to use their Star Harvester to harvest the Earth's sun for Energon, because they didn't want to doom the life on the planet. Ordering the Decepticons to wreak havoc and kill humans and Autobots, The Fallen has them revive Megatron. In the Decepticon campaign, The Fallen uses Megatron to find the Star Harvester, promising to make him a Prime, intending to betray him as soon as he succeeds. When Megatron confronted him about a lie, The Fallen immediately tries to kill him, using countless Decepticons as Cannon Fodder, while intending to not only destroy all life on Earth, but harvest countless stars and worlds across the galaxy.
      • Starscream is the treacherous right hand of Megatron, who immediately took over as the leader of the Decepticon forces after Megatron died. Coordinating and organizing the Decepticon attacks on cities and military bases, Starscream encourages Decepticons to kill more innocent humans along the way. As his troops succeed to kill some Autobots, Starscream kidnaps and extract information about Mikaela Banes, Sam Witwicky's girlfriend, from a group of innocent people, killing them in process, and planning to kill Sam and Mikaela as well, Starscream has his troops search for them. Later on, assisting The Fallen in his attempts at harvesting Earth's sun, thus destroying all life on the planet, Starscream destroys a large museum full of people, trying to catch Sam and the ancient Seeker Jetfire.
    • PS2/Wii video game: Megatron is the former leader of the Decepticons, who lost his position after dying at Optimus Prime's hands. After he got revived by the Fallen, Megatron was angry at the fact that The Fallen took away his leadership over the Decepticons. Barely tolerating his "new master", Megatron orders his Construction Devastator to spread chaos and destruction all over Chinese city of Shanghai, destroying large parts of the city, simply so he can get the piece of the Allspark. Destroying human military bases, Megatron assists The Fallen in his attempts at destroying all life on Earth simply so he can have a victory over the Autobots.
  • Dark of the Moon:
    • The film: Sentinel Prime, once a noble Prime who mentored Optimus Prime himself, has succumbed to greed, lust for power, and a desire to be the one god remaining among the Cybertronians. Murdering the Autobot Ironhide and many soldiers to retrieve the Pillars, Sentinel plans to drag Cybertron to earth. Feigning regret to trick Optimus and the Autobots into departure, Sentinel has them seemingly murdered by Starscream and orders the entire city of Chicago massacred so humanity will know their place is slavery or death, with intent to kill the Earth for its resources and use humankind as slaves. When Optimus returns, Sentinel remorselessly tries to murder him, declaring that he will be the single God remaining. In Peter David's novelization, Sentinel further melts down Skips and Mudflap in a brutal fashion before forcing Agent Mearing to cow to his demands under threat of personally slaughtering countless men, women and children while forcing her to watch, Sentinel later overseeing rampant Autobot tortures and executioner with wry amusement.
    • The IDW comic makes two villains worse than in the film:
      • Shockwave—also in the Foundation and Rising Storm prequel comics—is portrayed as a brutal and remorseless Decepticon assassin. Initially a follower of Sentinel Prime, Shockwave expressed disgruntlement with an age of peace and freedom and, as part of Megatron's Defense Force, eagerly massacred dissenting Cybertronians. Joining the Decepticons, Shockwave became Megatron's most lethal minion, admitting that he enjoys the sounds of dying Autobots. Left in command of the Decepticons on Cybertron, Shockwave waged brutal campaigns against the remaining Autobots. On Earth, Shockwave murders Autobots Longarm and Salvage and the entire crew of an oil processing plant. Enslaving the drone Brains to build a cage for his Driller, Shockwave plans to terminate him when he is no longer useful. When Brains escapes, Shockwave kills Deadlift for simply being in his way. Shockwave goes on a killing spree in the NEST base, killing everyone in his path, including traumatized Autobot refugees. Even the death of the Driller, his pet, fails to rouse any emotion from Shockwave.
      • Dylan Gould is portrayed as a sadistic psychopath with delusions of grandeur. Having willingly allied with Decepticons years back, Gould covers up the Decepticons' plans and presence from the public eye, having anyone who attempts to learn the truth murdered by his personal Decepticon attack dog, Laserbeak. Once the Decepticons reveal themselves and attack the Earth, Gould uses Sam Witwicky to spy on the Autobots under threat of slaughtering his girlfriend, Carly, and giddily gives the order for the Autobots to be shot down while they are attempting to leave the Earth. Masterminding the invasion of Chicago, Gould has the Decepticons kill countless people and destroy much of the city while turning it into a fortress. Gould ultimately plans to assist the Decepticons in transporting as much of humanity to Cybertron as possible, then use them as slaves to rebuild Cybertron while Gould lords over them as their master. Even when the Autobots and humans begin defeating the Decepticons, Gould still activates the portal to bring Cybertron to Earth, completely eliminating any possible claims he had to not being fully complicit in the Decepticons' actions. Always wearing a smile and having a witty quip on hand to cover up his raving egomania, Gould truly represents the very worst humans have to offer.
  • Age of Extinction note :
    • Harold Attinger is a cold, calculating CIA operative who creates "Cemetery Wind" under the guise of protecting Earth. In truth, Attinger uses Cemetery Wind to ally with Lockdown in tracking down and butchering countless Transformers across Earth and turning their husks into his personal army. Callous to the lives of innocents and even his own men, Attinger threatens the teenage daughter of Cade Yeager for information, unleashes Galvatron onto a populated area and shrugs off lives lost, and orders Lockdown to go all-out in destroying Optimus Prime, which leads to copious death and destruction through Hong Kong. Planning to use the Cybertronian Seed to create a new breed of Transformers who will be immediately enslaved as war machines, Attinger then tries to murder his business partner and other innocents for crossing him. Attinger claims to want the best for America, but soon enough reveals his true colors of a greedy sociopath who will endanger countless lives to satisfy his privileged, hateful rhetoric against any life that isn't his own.
    • Lockdown is a cruel mercenary with a love for "The Hunt" who has killed countless in his career through the galaxy, having their corpses thrown in the trash and torn to pieces, also capturing numerous specimens and locking them away in his "Collection", bastardizing a Knights of Cybertron ship meant for exploration to do this. Hired by "The Creators" to find Optimus Prime, Lockdown travels to Earth and allies with the genocidal Harold Attinger, killing legions of Transformers with "Cemetery Wind" so their remains could be used to make synthetic slaves, at one point brutally ripping out the Autobot Ratchet's spark. In his hunt for Prime, Lockdown kills the human Lucas with a nightmarish bomb that fries his skin off, later trying to have a teenage girl ripped apart by trash bots. Lockdown then gives Attinger "The Seed" so he could make an endless amount of enslaved mechanical soldiers, and after Prime escapes, Lockdown ravages Hong Kong, destroying several buildings, ships, and causing other mayhem.

Rebooted continuity

  • Bumblebee:
    • Shatter and Dropkick are a pair of Decepticons out to hunt down and kill Optimus Prime. Introduced torturing and murdering the Autobot Cliffjumper, the two arrive on Earth where Dropkick kills a human simply for fun. Directed to the human authorities, the two claim to be peacekeepers hunting down a criminal to give them access to humanity's satellites. After capturing and torturing Bumblebee, the two murder a doctor who was helping them, revealing their intent to bring their forces down on Earth and kill every human being, not stopping until the planet is a cinder. A vicious pair of Brains and Brawn, Shatter and Dropkick embody the worst of the Decepticons.
    • Prequel comic: Malignus is a Mini-Con whose small size belies his apocalyptic ambitions. Leading a cabal of Decepticons during the Cold War, Malignus intends to provoke a nuclear conflict that would wipe out the human race, allowing him to plunder the planet for its Cybertronian treasures. Throughout the globe, Malignus organizes False Flag Operations and assassinations of top officials from both Eastern and Western Blocs, raising tensions between the two sides. When Bumblebee and his human companions raid the Decepticons' base, Malignus tries to have them fed to his Sharkticons, and then fires a nuclear warhead directly at the Soviet Union when they escape and nearly foil his scheme.


  • Megatron is the cruel, ruthless leader of the Decepticons and the Autobots' worst enemy. A megalomaniac who overthrew Megazarak, the generally peaceful leader of the Decepticons, to make them his own, Megatron spurred them into an all-out war against the Autobots, leading to heavy casualties on both sides. Megatron utilized chemical weapons that wiped out entire battlefields—even his own men—and air bombings on civilians. After resurrecting himself on Earth, he first hires Stiletto to steal an experimental alloy and a high-powered laser scalpel, uncaring when it nearly destroys an entire bridge filled with people. He tries to convince Soundwave to try and enslave or wipe out all of humanity, and then tries to raze Earth himself. When foiled in this scheme, Megatron makes several attempts to invade Cybertron. Some of his worst acts include torturing the Constructions to convert them to Decepticons, and then trying to trap all the Autobots in an agonizing fate with Swindle's EMP weapon. Eventually, ordering Decepticon attacks on several Autobot bases throughout the cosmos while he personally invades Cybertron and destroys its Autobot leaders, Megatron makes his new Omega Supreme clones and tries to test them by first annihilating Detroit.
  • Meltdown, originally Prometheus Black, is a human scientist who ended up mutated by his own experiments. He tries to kill his rival, Isaac Sumdac, in a fit of rage whilst blaming him for all his problems, including his self-inflicted transformation. Later, he becomes so obsessed with creating a human transformer, he not only mutates at least two innocent humans—one of them his own lawyer—into gruesome hybrids combined with animal parts, he also decides to kidnap Sumdac's innocent eight-year-old daughter as his newest test subject, deciding to experiment on children in general now. When Blackarachnia breaks him out of jail in exchange for him eliminating her organic half, he double-crosses her and tries to destroy her Transformer half—a deed which, if not destroying her soul completely, would have left her with a completely organic body she's disgusted with. He also forces the Dinobots to work for him by painfully burning them with his acidic touch until they follow his commands. He hurt them so badly that they were willing to turn on Bulkhead and Prowl, their only friends among the main cast, just to stay in Meltdown's good graces.
  • Lockdown is a ruthless and sadistic Bounty Hunter whose only loyalty is to himself. Unaligned with Autobots or Decepticons, Lockdown is indiscriminate in his prey, taking commissions from whomever is willing to pay him. To make himself more powerful, Lockdown steals upgrades from his targets, torturing them by cutting the weapons from his victims' bodies. Devoid of empathy, Lockdown sees his victims as little more than trophies, taunting them if he chances to encounter them again. Having once been a student of the Autobot Yoketron, Lockdown murdered his former master in order to steal the protoforms under Yoketron's protection and sell them for his own profit. Merciless and consumed by greed, Lockdown is a sociopath who frightens and disgusts Autobots and Decepticons alike.
  • Be the Hero #3—Web of Deception Gamebook: Lockdown is shown to be as psychotic and unempathetic as his cartoon counterpart. Allying himself with Blackarachnia, Lockdown gets hired to kidnap Optimus Prime for her and strap the Autobot leader to a bomb that will not only mutate him into a techno-organic abomination but also destroy the city of Detroit in the process. When the other Autobots try to interfere, Lockdown disables them, along with immobilizing Sari and her friend with polyxylon resin, and then throws them all into Lake Erie, leaving the two children to nearly drown to death. Not bothered at all by the fact that the detonation will kill thousands of people, Lockdown only betrays Blackarachnia to stop her plans when he finds out that he's being underpaid and decides to get a better deal by selling her off to a safari hunter in the Kvi Cluster.
  • "The Trial of Megatron" 3-parter: In these unproduced episodes, Megatron proves to be as vile as ever. After the events of the finale, Megatron is arrested by the Autobots and imprisoned. Megatron plots to escape, however, so he slowly manipulates Sentinel Prime, at one point threatening to continue having his forces raid Cybertron if Prime does not submit to his deal. Megatron escapes from prison and launches a massive attack on Cybertron using boosters to break Kaon apart from Cybertron, which causes devastating effects on the planet with many citizens put in danger and threatens to tear apart the planet. Later on, Megatron throws the Starscream clones into the fusion reactor, and later Shockwave and Blitzwing, to provide Kaon with power. Once power is restored, Megatron attempts to crash Kaon into Detroit, the place on Earth with the highest amount of Energon.

Aligned Universe

  • Video Games:
    • War for Cybertron & Fall of Cybertron: Megatron is the bloodthirsty leader of the Decepticons and the instigator of the first game's devastating titular war, bent on the conquest of Cybertron and destruction of the Autobots. Upon taking control of the powerful Dark Energon, Megatron infects Cybertron's core with it to bring the planet under his control. When the corruption is cleared away, the core is forced to shut down, leaving Cybertron on the brink of death. As the Autobots try to flee their dying world, Megatron has their ships shot down, endangering the survival of his own species, before sending the monstrous Trypticon after them. Later acquiring the Dark Spark, Megatron uses it to resurrect dead Autobots as mindless drones to fight on his side. Rejecting any notion of peace, Megatron goes on to blame Optimus Prime for Cybertron's decline and does everything in his power to prevent the Autobots from escaping with their lives. After recovering the damaged Trypticon, Megatron, not caring if Trypticon is still conscious or not, cannibalizes his body, converting it into a warship, which he uses to attack the Autobots on their last desperate attempt to flee Cybertron. A merciless tyrant driven by hate and a lust for power, Megatron is willing to push his own race to extinction if it means that he wins.
    • Fall of Cybertron & Rise of the Dark Spark: Shockwave is one of the highest ranking Decepticons in Megatron's army, who is responsible for many of their inventions. After Megatron sent him to track down the ancient artifact called the Dark Spark, Shockwave managed to enslave Insecticons to his will and captured Cliffjumper, planning to experiment on him later. Succeeding in getting the Dark Spark, Shockwave helped Megatron use it to revive the dead Autobots, while planning to capture and experiment on many more Autobots. After that, Shockwave captured and experimented on countless Autobots and Insecticons, dissecting them in his labs. Forcing his Decepticon underlings to work with the Insecticons, despite the wild nature of the beasts, Shockwave didn't care that this led to them slaughtering each other. Getting his hands on Grimlock and his Lightning Strike team, Shockwave performed numerous especially brutal experiments on them, hoping to wipe their mind and rebuild them as his own foot soldiers. After Grimlock freed himself, Shockwave sent hundreds of his own underlings and Insecticons to get slaughtered, simply as a way to test Grimlock's abilities.
    • Rise of the Dark Spark: Lockdown is a Bounty Hunter searching for the titular Dark Spark. After discovering that it has landed on Earth, he and his army of mercenaries attack a city in their quest to find it, and also torture Drift and nearly kill him and Bumblebee after they interfere. Once he acquires the Spark, Lockdown and his army later attack a second city so he will gain access to a time bridge hidden underground. As he prepares to activate the bridge, he gloats to Optimus Prime about how he plans on using the bridge to bring the Decepticons down to Earth, which would reignite another Cybertronian civil war that would result in the Earth being destroyed. Relishing in his profession, Lockdown nearly started another galactic war that would've killed millions of humans and Cybertronians alike, all so he could satisfy his greed.
  • Prime:
    • Unicron is an ancient entity that shared an existence with Primus before both developed their own viewpoints and feelings towards the universe, Unicron choosing to see all life as pointless and beneath himself. Unicron waged a path of destruction across the universe, destroying countless worlds before being plunged into a deep slumber from which the Earth formed around him and gave life to humanity. Upon being awoken by Megatron's efforts, Unicron immediately denounces the loyal Megatron as worthless to him, and reveals his plans to destroy the entire Earth and personally enjoy the annihilation of humankind. Although Unicron was beaten, his essence attached to Megatron, and soon takes control of Megatron's corpse—-in the process barring the Decepticon from the afterlife and keeping him as a toy to be tortured—after which Unicron plans to destroy Cybertron as a final spite against his former brother Primus.
    • Colonel Leland "Silas" Bishop is leader of MECH, a terrorist group researching Cybertronian technology. His crimes include capturing Breakdown, torturing him, trying to have him vivisected, and removing one of his eyes; and allying MECH with Airachnid to get his hands on another Cybertronian, Arcee, and was perfectly willing to let Airachnid kill Jack Darby, a sixteen-year old teenager, and his mother to do it; he even states a few human lives are worth it for Arcee's tech. After his men upload him into the now-dead Breakdown's empty shell, saving his life in the process, he thanks them for that and their years of loyal service by thanking them personally and then slaughtering them. He then, taking the name CYLAS—"CYbernetic Lifeform Augmented by Symbiosis"betrays the human race to Megatron. Seeing himself as a superior being, he razes a military base just to get Megatron's attention, then attempts to blow up everybody inside Raf's house.
    • Airachnid is a self-styled "ex-Decepticon" who spent her time in the Great War capturing, torturing, and slowly killing any Autobots she could find for fun. For certain victims, like Arcee, she'd go out of her way to find people they cared for and murder them before their eyes as part of her fun. After the war left Cybertron, she struck out solo to pursue a new hobby: hunting endangered and soon-to-be extinct species—or species she will make extinct—for sport and collecting grisly "trophies" of her kills. Should she find an attractive species that isn't endangered, she'll ensure that they are by the time she's done, deciding to make humans her new toys, starting with the teenage Jack Darby. Forced back into serving Megatron, Airachnid barely hides her dissatisfaction, trying to usurp control from Megatron at times. She finally breaks free when she finds an Insecticon hive, murders fellow Decepticon Breakdown along the way, and plans to use her new servants to destroy Megatron. Sadistic, merciless and terrifying while enjoying her atrocities, Airachnid is one of the worst to wear the Decepticon logo.
    • Beast Hunters comic issues #1-2: Airwave is an Autobot who, after the Great Civil War, abandoned the Autobots' ideals in favor of an "everyone out for himself" philosophy, due to believing that Optimus Prime and the others left them to die on Cybertron. Forming one of the Autobots cities underground, called Lost Spark, Airwave found an easy way to get Energon for himself by secretly killing his own followers and then draining their bodies of Energon in the morgue. Thus killing several dozen of his own people and closest friends, Airwave planned to feast on all inhabitants on the Lost Spark, until he was discovered by Sludge and Snarl, after which he shot Firestar in the back and framed them for it, leading to his followers attacking them. Trying to kill Sludge and Snarl, Airwave didn't care when he killed dozens of his own people in the crossfire.
  • Robots in Disguise: Megatronus, once a member of the Thirteen Primes, was locked away for betraying his comrades and murdering Solus Prime. Still having influence outside of his prison, Megatronus causes the Decepticon prison transport ship, The Alchemor, to crash on Earth, unleashing dozens of Decepticons on the planet. Contacting Steeljaw, Megatronus manipulates him into releasing him from his prison, and uses his psychic powers to force one of Steeljaw's soldiers to begin amputating his own arm to convince Steeljaw to work faster. When unleashed from his prison, Megatronus betrays Steeljaw, tries to murder both him and the Autobots attempting to thwart him, and reveals he plans to use the power of Unicron and the Allspark to destroy both Earth and Cybertron in one fell swoop as revenge for his imprisonment. Perhaps once a good person, Megatronus shed any heroic traits and replaced them with pure sociopathy and blind hatred.


  • Starscream is the former second-in-command of the Decepticons willing to do anything for power and revenge. Abandoned by Megatron for his treasonous behavior, Starscream manipulates his loyal Seekers to help him steal the AllSpark and Vector Sigma so he can become a living god and kill all Cybertronians for his insane utopian vision, starting with his loyalists first. When defeated by Optimus Prime and imprisoned on the Ark, Starscream tampers with Wheeljack's AllSpark emitters to launch a Hate Plague upon the Autobots in the hopes that they would kill each other. His most heinous crime is when he encounters the Quintessons and gladly sells out his planet and race to save his own spark. Rebuilt as a Quintesson Judge, Starscream uses his newfound authority to declare all Cybertronians guilty of crimes against him and takes delight in massacring civilians with the enslaved Titan Croaton as he prepares to destroy the entire universe in his final act of revenge. An Omnicidal Maniac who holds no loyalty to anyone but himself, Starscream is a threat so destructive that the Autobots and Decepticons are willing to put aside their differences to save their universe.
  • Season 3: The Scientist is the mastermind behind the Quintessons' invasion throughout the multiverse. In order to pass judgement on each universe, the Scientist mutilates several of its natives into becoming a Quintesson Judge so they can condemn it and annihilate everything. To keep things more satisfying, the Scientist also kidnaps the Soundwaves from all the countless universes that he has destroyed and traps them as immobile figurines in his collection. Eventually recruiting Starscream into becoming the Judge of his universe, the Scientist used a machine that drained the sparks of numerous Cybertronians in order to fuel him. After both the Autobots and Decepticons started to fight back, the Scientist would take control of the Titan Croaton against his will and force him to attack them.
  • "The Other One" & "The Perfect Decepticon": Megatron X, aka the Other One, is a Megatron from an alternate universe where he took the fateful decision of murdering his former friend Optimus Prime and claiming his Matrix of Leadership early in the war. With Prime gone, Megatron X proceeded to kill all the Autobots and use the AllSpark to create his army of "Perfect Decepticons", later revealing that he forcefully wiped the minds of the Perfect Decepticons to make them mindless slaves to him. After this, Megatron X exterminated his "unneeded" Decepticons and tormented the survivors Astrotrain and the Insecticons so much that they would rather flee to other universes than live under his rule. When the multiverse-hopping Megatron steals his Matrix to stop the Quintesson invasion in present-day, Megatron X pursues his doppelgänger with extreme prejudice, eventually catching up to him in the main universe and kills him with ease, calling him unworthy and a failure to his name, and relishes to repeat his genocide of Autobots and Decepticons all over again in this universe. Feared and hated by everyone, Megatron X is what Megatron would have been without honor or respect for Optimus Prime.
  • "The Immobilizers":

Crossovers with G.I. Joe

  • G.I. Joe vs. the Transformers:
    • G.I. Joe vs. the Transformers II, written by Dan Jolley: Shockwave is a coldly ruthless Decepticon who assumed control of Cybertron after the disappearances of Optimus Prime and Megatron, and now rules it with an iron fist, crushing any rebellion against him. Scheming to invade Earth, Shockwave successfully turns the planet into a warzone, killing billions of humans and keeping countless more as slave labor who he routinely executes by the dozen when they fall behind in their workloads. When the past is altered and Earth is saved from this invasion, Shockwave instead attempts to bring about a time fracture upon Earth, bathing the planet in nuclear fire for decades and wiping out all life on the planet so he can then gut the planet of its resources, and planning to keep human survivors as experiments for him to vivisect.
    • Black Horizon, written by Tim Seeley:
      • Unicron is the Chaos Bringer, a planet-sized Transformer that devours entire planets and keeps thousands of survivors as tortured, mind-altered slaves inside his body until they die and he replaces them with new victims. Having devoured countless planets over millennia, Unicron struck a deal with Cobra-La on Earth that he would spare the planet for a few centuries until there were billions of humans populating it, at which point Unicron would return and consume them all, leaving the barren husk for Cobra-La to rule. When the G.I. Joes and Transformers try to stop Unicron as he causes natural disasters worldwide and kills countless people, Unicron sics his "antibodies" on them, gleefully boasting his plans to slowly eat them all alive in the same fell swoop that he consumes Earth.
      • Golobulus is Unicron's agent on Earth, ruling over Cobra-La and using his forces to scheme for Unicron's return. Capturing and twisting several Transformers into his monstrous slaves, Golobulus uses them to slaughter anyone who tries to uncover his plans, and even takes humans captive to be kept as tortured pets. Threatening and abusing his own people should they fail him, Golobulus, believing humanity to be a blight upon the Earth, summons Unicron to Earth to wipe out the entire race so that himself and Cobra-La can reign over the planet, and tries to brutally kill the G.I. Joe soldier Firewall as a "sacrifice" to Unicron in celebration of the genocide of humanity.
  • Transformers/G.I. Joe:
    • Cobra Commander is the leader of Cobra in the 1930s, here interpreted as a stand-in for the Nazi regime and all the evil that involves. Enslaving the Decepticons to his will after slaughtering a monastery they were slumbering in, the psychopathic Commander forces them to lay waste to cities across Europe, with any survivors of the bloody massacres—even children—being thrown into slave camps or used as human shields. The Commander forces Shockwave to exhaust all of his energy in bombing his foes, uncaring that he's killing most of his slave labor while remarking "that's what they're for", after which Cobra Commander proclaims his intent to overrun the world with his tyrannical rule and institute himself as a god, deciding on a whim who lives and dies under his megalomaniacal boot.
    • Anastasia DeCobray, The Baroness, is the Nazi-esque Cobra's highest ranked leader except Cobra Commander himself, and matches her commander in cruelty. A vile sadist who enjoys torturing prisoners with tools thousands of years old, the Baroness subjects the G.I. Joe member Flint to such agony and seemingly kills him in the process. Always advocating for Cobra's more horrible crimes, the Baroness eventually initiates her master plan alongside her lover Destro, murdering their ally Starscream and unleashing the monstrous Bruticus to wipe out enemy, foe, and innocent alike in a bloody massacre. Personally betraying and killing the Commander himself, the Baroness then reveals her intent to kill even Destro, hoping to consolidate her own power once everyone who could rival her is dead.

Other Crossovers (by publication date)

  • New Avengers/Transformers, written by Stuart Moore: Megatron is the tyrannical leader of the Decepticons who seeks to triumph over the Autobots, regardless of the cost. Desiring energon to fuel his war effort, Megatron serially manipulates planetary populations into warring and wiping each other out for the Decepticons to strip their worlds of energon, killing billions. Planning to restart this process on Earth, Megatron tries to start a nuclear war between the countries of Latveria and Symkaria, as well as kidnapping and physically tormenting Spider-Man to siphon his superpowers for his own minions. When the Avengers and Autobots work together to stop his plan, Megatron tries killing them personally, even spitefully trying to kill Iron Man in front of Optimus Prime.
  • Star Trek vs. Transformers: Megatron is once again portrayed as a power-mad tyrant. With the Autobots fleeing Earth with the breakout of World War III, Megatron and the Decepticons pursue them, resulting in a battle where both sides end up in stasis on a remote planet. Centuries later, a Federation mining team accidentally revives the Autobots and the Decepticons, resulting in the Decepticons attacking the Federation mining colony. Optimus Prime and the Enterprise crew team up and drive off the Decepticons, but Megatron meets and teams up with the Klingons. The Klingons and Decepticons renew their attack on the Federation mining colony, not caring how many Federation colonists die in these attacks. When Starscream flees to Kronos to conquer it, Megatron and the Decepticons pursue Starscream to Kronos. Megatron defeats Starscream and claims Kronos for himself so that he can enslave the Klingons and use their resources to launch a war of conquest against the Federation. When the Klingons refuse to surrender, Megatron orders his forces to annihilate all the Klingons.
  • Transformers vs. The Terminator: Megatron, upon being awaken by Skywarp, proceeds to wipe out the Autobots while they are still offline, and decides to conquer Earth. Declaring war upon humanity, Megatron leads the Decepticons in annihilating entire human armies, forcing humanity to create Skynet in their attempt to survive. Successfully wiping out humanity and enslaving Terminators, Megatron orders Stascream to destroy Skynet when he discovered that it was plotting against him. Despite Skynet succeeding in sending one of its Terminators into the past to prevent Megatron from winning, Megatron still managed to awaken in the past and once again attempts to wipe out the Autobots, while leading the Decepticons in attacking innocent humans.
  • Transformers/Back to the Future: Alternate Timeline Megatron is as per usual a brutal tyrant. Due to the manipulations of a time-traveling Rumble, Megatron and all the other Decepticons were awakened prematurely. Megatron would kill off Optimus Prime, and without him to stand in his way, Megatron quickly conquered the world, killing most of the Autobots and forcing the rest underground. Megatron would also murder Rumble for seemingly no reason and used Biff Tannen to enslave all of Hill Valley, where the population would be forced to mine for energon. Megatron would also murder them whenever they failed to meet his quotas, as well as killing anyone who opposed him. By 2015 Megatron's sheer level of cruelty eventually got so bad that it caused Gigawatt to turn on him. Megatron attacked him, intending to kill him, but Gigawatt was able to escape just in time.

Other Continuities (by release date)

  • Challenge of the GoBots' "In Search of Ancient GoBonauts": Doctor Cunningham is an archeologist who worked for UNECOM and is secretly an undercover Renegade spy. While excavating an ancient pyramid, Cunningham found a spaceship which led to the discovery of the Dark Heart, an Antimatter weapon created by the "Evil One" that nearly destroyed GoBotron thousands of years ago. After Scooter, Nick, and AJ helped him find the Dark Heart, Cunningham revealed his true intentions and gave it to Cy-Kill so he can destroy the Guardians. However, Leader-1 managed to talk Cy-Kill out of using it, as the Dark Heart had the potential to rip a hole through the time-space continuum and destroy the entire universe. Cunningham then stole the Dark Heart for himself so he can become "the loon that's going to bring the world to an end".
  • Robots in Disguise (dub only): Megatron is the leader of the Predacons, who arrived on Earth in search of the Autobot Weapon Fortress Maximus under the pretext of raiding Earth for its energy. Upon arrival, he kidnaps Doctor Kenneth Onishi and probes his mind to find the location of Fortress Maximus. After receiving knowledge of the Autobot Protoforms, Megatron corrupts their sparks in order to create his Decepticons. Although initially A Father to His Men to his minions if they prove themselves worthy of respect, he discards these qualities upon his rebirth as the Decepticon Galvatron—absorbing the energies of the Predacon Brothers against their will to power his new body immediately upon his transformation, and later reducing Scourge and the Decepticons to mindless drones for plotting to overthrow him with the use of Fortress Maximus. Galvatron's worst actions, however, came during the finale when, after surviving a battle with Fortress Maximus, he transforms into bat form and drains Fortress Maximus's energy to power himself. He then unleashes his bat swarm to brainwash human children with the goal of enslaving them and repeating the process from planet to planet until he has conquered the universe, threatening to harm the children if Omega Prime or the Autobots intervene. When the Autobots flee into the Space Bridge, Galvatron sends the Decepticons to pursue with the intention of destroying both groups by collapsing the Space Bridge, not caring if any Predacon gets caught in the collapse, all so he could have the entire planet to himself.
  • Unicron Trilogy:
    • Anime:
      • Unicron is a powerful and ancient Transformer who feeds upon worlds and the negative emotions of others. Disguising himself as one of Cybertron's moons, Unicron created the Mini-Cons to escalate the war between the Autobots and the Decepticons. Hoping to consume both sides once he regained enough power from their conflict, Unicron's plans were foiled when the Mini-Cons gained free will and abandoned Cybertron. Once fully awakened, Unicron attacked Cybertron, killed Starscream, and briefly stripped the Mini-Cons of their free will. After being defeated, Unicron returned by devouring the home world of Alpha Q and all of its inhabitants. When Megatron revived him, in hopes of turning him into a weapon, Unicron possessed Megatron and went off to destroy several planets that Alpha Q had managed to restore.
      • Megatron, later known as Galvatron, is the brutal commander of the Decepticons. Desiring to destroy the Autobots and conquer the universe, Megatron enslaves Mini-Cons, tries to kill the Autobots' human allies, and tries to destroy Earth with the Hydra Cannon. Upon his resurrection, Megatron leads his forces in destructive raids for Energon. Megatron plans to use the element to revive Unicron and use him as a weapon. Megatron uses Unicron's power to subvert the wills of his followers, notably enslaving Scorponok and Starscream. Developing a god complex, Megatron seeks to use the Cyber Planet Keys to accelerate the Unicron Singularity's expansion to end reality and reconstruct it in his own image.
    • Dreamwave's Armada & Energon comic: Unicron is portrayed as even worse than his anime counterpart. Known as the Destroyer of Worlds, Unicron travels throughout the multiverse and devours entire realities in his path, even consuming the sparks of his victims, keeping them conscious but helpless within his core. Eventually arriving to the Armada universe, Unicron would try to destroy Cybertron before being defeated by the Mini-Con Matrix. However, Unicron survives and, with the help of Alpha Quintesson and his Horsemen of the Apocalypse, he would try to invade Cybertron again as a distraction so the Autobots would be unable to save the Earth from the Terrorcons. During his attacks on Cybertron, Unicron was responsible for the deaths of numerous Autobots and Decepticons.
    • Cybertron's "Balancing Act" comic: Unicron proves to be as vile as ever, even after his death. When Primus decided to defeat Unicron by sealing him away in an Energon Sun, it caused him to collapse into the Unicron Singularity, a massive black hole which threatened to destroy the universe. No longer bound to a physical body, Unicron used his evil essence to replicate the Unicron Singularity across all alternate realities, intending to make the entire multiverse cease to exist. After being resurrected by Soundwave and the negative emotions of the planet Yst, Unicron caused a war between the Mini-Cons and kidnapped the remaining members of the Thirteen as part of his plan to eventually kill Primus for good.
  • Shattered Glass:

Alternative Title(s): Transformers Aligned Universe, Transformers Generation 1, Transformers Film Series, The Transformers