History Monster / Transformers

* ''[[WesternAnimation/TransformersEarthSpark EarthSpark]]'': [[KnightTemplar Dr. "Mandroid" Meridian]] is a brilliant human [[MadScientist scientist]] who [[FantasticRacism harbors a bigoted hatred for all Transformers]] after he lost his arm in their civil war. Routinely kidnapping Transformers to [[PlayingWithSyringes experiment on them]], Mandroid butchers their bodies and drains them of their Energon, leaving a trail of bodies in his wake. His malice extending to anyone who allies themselves with the Transformers, Mandroid regularly tries to kill the Malto children and their parents, and {{mind rape}}s their Terran allies into his slaves. Mandroid further arranges {{false flag operation}}s that endanger hundreds of humans just to stir up anger towards Transformers. In his final gambit, Mandroid murders his partner Croft, turns himself into an abomination of alien technology just to slake his destructive desires, and tries to set off a device that will kill every single Transformer on Earth--including [[BadBoss Mandroid's own Sharkticon minions]]. Though the loss of his arm is a legitimate grievance, [[NotSoWellIntentionedExtremist Mandroid]] is defined as nothing but a prejudiced, wannabe "savior" of the world, and is directly called out by the benevolent Dot--a fellow amputee and victim of the war--as being motivated by his own blind hate and lust for power.

->''"Say goodbye to the universe, Maximals! The future has changed. Yes. The Autobots lose! Evil triumphs! And you...you no longer exist!" ''
-->-- '''[[Characters/BeastWarsMegatron Megatron]]''', after trying to murder Optimus Prime and rewrite history, ''WesternAnimation/BeastWars'', "[[Recap/BeastWarsS2E13TheAgendaPart3 The Agenda, Part 3]]"

** [[Characters/BeastWarsMegatron Megatron]] is a self-proclaimed tyrant and would-be GalacticConqueror. A [[BadBoss 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 ''WesternAnimation/BeastMachines'' he's gotten worse, picking up a serious [[AGodAmI god complex]] along the way. Seizing control of Cybertron, Megatron [[YourSoulIsMine extracts the sparks]] from everyone on the planet, reducing them to [[SoullessShell mindless drones]]. Acquiring a hatred of all organic life, Megatron tries to [[OmnicidalManiac 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.

* [[TheDragon Starscream]] is the [[AmbitionIsEvil ambitious]] and power-hungry lieutenant of the [[Characters/TransformersFilmSeriesDecepticons Decepticons]], and shows himself to be the evilest member of [[Characters/TransformersFilmSeriesMegatron Megatron]]'s inner circle. A treacherous schemer who took over the Decepticons when Megatron disappeared on Earth, Starscream tricks a group of human astronauts into attacking the Autobots so they will be killed in the firefight and their information on Megatron's whereabouts silenced. When the moral Autobots avoid claiming the humans' lives, Starscream just murders the entire crew himself. Later [[Film/Transformers2007 staging the initial invasion of Earth]] in his quest for the All-Spark, Starscream has the likes of Blackout, Scorponok, and Barricade wreak havoc across the globe and murder hundreds of humans. After Megatron's revival, Starscream assists him in trying to [[KillAllHumans wipe out humanity]] with the All-Spark, and [[Film/TransformersRevengeOfTheFallen aligns himself with the Fallen]] to destroy Earth's sun, during which Starscream takes Sam Witwicky's parents hostage to achieve their plans. In between these atrocities, Starscream tries to flood Zambia and kill millions; devastates Rome to draw out the Autobots; and brutally murders his human ally Bruno Carrera in petty rage. [[Film/TransformersDarkOfTheMoon Ultimately working with Sentinel Prime]] to enslave and decimate humankind, Starscream plays a key role in the takeover of Chicago by personally bombing the Autobots' ship and massacres any soldiers attempting to infiltrate the city, culminating his sadistic ways in toying with and trying to murder Sam and his girlfriend Carly Brooks-Spencer.

** [[StrawHypocrite Harold Attinger]] is a cold, calculating UsefulNotes/{{CIA}} operative who creates "Cemetery Wind" under the guise of protecting Earth. [[NotSoWellIntentionedExtremist 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 [[Characters/TransformersFilmSeriesMegatron 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 {{greed}}y sociopath who will endanger countless lives to satisfy his privileged, [[FantasticRacism hateful]] rhetoric against any life that isn't his own.

** [[Characters/TransformersFilmSeriesMegatron Megatron]] is the leader of the [[Characters/TransformersFilmSeriesDecepticons Decepticons]] who defeated the [[Characters/TransformersFilmSeriesAutobots Autobots]] in the Battle of Mission City, gained possession of the [=AllSpark=], and captured Optimus Prime to keep him [[AndIMustScream frozen alive]]. After assimilating with the [=AllSpark=], Megatron intended to use its power to [[HostileTerraforming cyberform the Earth]] and [[KillAllHumans wipe out all of humanity]], while destroying any and all Autobots who get in his way. A gloating sadist, Megatron does not like to finish his opponents off quickly, as evidenced by when he tried to torture Bumblebee until he begs for mercy and later slowly beating Optimus Prime to death despite being more than powerful enough to take him out instantly. When the [=AllSpark=] became unstable and seemingly killed him, Megatron downloaded his consciousness into an interface module so he can enter Starscream's mind. During his time there, Megatron helped Starscream with a plan to use the mind-controlled President Allen to drive the Autobots off of the planet and destroy them with a nuke as they left, leaving humanity defenseless against any Decepticon attacks. Eventually, Megatron convinces Starscream to resurrect him so he can kill their enemies and conquer the Earth for himself.

** [[VideoGame/TransformersTheGameConsole Console video game]]: [[Characters/TransformersFilmSeriesMegatron Megatron]] is the leader of the [[Characters/TransformersFilmSeriesDecepticons 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 [[HeroKiller kill Optimus Prime]] and get his hands on the Allspark, invading the Earth and [[KillAllHumans exterminating humanity]], before proclaiming that he is finished with Earth.
** [[VideoGame/TransformersTheGameDS DS video game]]: [[Characters/TransformersFilmSeriesMegatron Megatron]] lacks his film counterpart's nobler traits and [[AdaptationalVillainy replaces it with raw brutality]]. Having plunged Cybertron into civil war after [[{{Patricide}} 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 [[UngratefulBastard 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 [[TheSocialDarwinist believed that the weak were only meant to serve the strong]].

** [[Characters/TransformersPrimeUnicronAndTheTerrorcons Unicron]] is an [[AbusivePrecursors 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 [[OmnicidalManiac 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 [[Characters/TransformersPrimeMegatron Megatron]]'s efforts, Unicron immediately [[UngratefulBastard 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 [[BarredFromTheAfterlife 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.

** [[ArachnidAppearanceAndAttire Airachnid]] is a member of the [[Characters/TransformersPrimeDecepticons Decepticons]] whose sultry voice barely conceals the unbridled sadism beneath. Acting as the TortureTechnician during the Great War, Airachnid put Arcee through various processes of agony before killing her partner Tailgate in front of her. Leaving the Decepticon cause, Airachnid took to a new hobby -- [[EgomaniacHunter hunting]] entire alien species to extinction for sport and [[CreepySouvenir collecting their heads as grisly trophies]]. Allying with Silas to get revenge on Arcee and Jack, Airachnid forces Jack to play a sadistic game of rescuing his mother before she kills them both. Eventually returning to the Decepticons, [[TheStarscream Airachnid tries to usher in an exodus to abandon Megatron]] on Earth with her as the new leader. Breaking free from the Decepticons after Megatron ordered her execution for her treacherous ways, also brutally murdering Breakdown during the execution, Airachnid discovers an Insecticon and mind controls it to kill Megatron -- ordering it to eviscerate [[Characters/TransformersPrimeStarscream Starscream]] as a mere test. Weaponizing an Insecticon hive, Airachnid tracks down the Decepticon warship and orders them to destroy it as payback towards Megatron. Released from her stasis prison aboard the Nemesis, Airachnid takes control of the Insecticon army and attempts to lead a violent coup to slaughter all Decepticons.

** ''Prime Directive'': [[InsaneAdmiral 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 [[HeKnowsTooMuch 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 [[DeathFromAbove 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 [[NukeEm nuked]], and when Spike burst in to stop him, Hallo holds him at gunpoint and [[ForcedToWatch forces him to watch]] as the city and Transformers are destroyed.

* ''ComicBook/NewAvengers[=/=]Transformers'', written by Stuart Moore: [[GalacticConqueror 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 [[ManipulativeBastard 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 [[Characters/MarvelComicsDoctorDoom Latveria]] and [[Characters/MarvelComicsWildPack 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 [[ForcedToWatch in front of]] Optimus Prime.

** UsefulNotes/PS3/UsefulNotes/Xbox360/PC video game:

** UsefulNotes/PS2/UsefulNotes/{{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 CombiningMecha Devastator to spread chaos and destruction all over Shanghai, destroying large parts of the Chinese city, simply so he can get the piece of the Allspark. Destroying human military bases, Megatron assists The Fallen in his attempts at [[OmnicidalManiac destroying all life on Earth]] just so he can have a victory over the Autobots.

* [[TheDragon Starscream]] is the [[AmbitionIsEvil ambitious]] and power-hungry lieutenant of the [[Characters/TransformersFilmSeriesDecepticons Decepticons]], and shows himself to be the evilest member of Megatron's inner circle. A treacherous schemer who took over the Decepticons when Megatron disappeared on Earth, Starscream tricks a group of human astronauts into attacking the Autobots so they will be killed in the firefight and their information on Megatron's whereabouts silenced. When the moral Autobots avoid claiming the humans' lives, Starscream just murders the entire crew himself. Later [[Film/Transformers2007 staging the initial invasion of Earth]] in his quest for the All-Spark, Starscream has the likes of Blackout, Scorponok, and Barricade wreak havoc across the globe and murder hundreds of humans. After Megatron's revival, Starscream assists him in trying to [[KillAllHumans wipe out humanity]] with the All-Spark, and [[Film/TransformersRevengeOfTheFallen aligns himself with the Fallen]] to destroy Earth's sun, during which Starscream takes Sam Witwicky's parents hostage to achieve their plans. In between these atrocities, Starscream tries to flood Zambia and kill millions; devastates Rome to draw out the Autobots; and brutally murders his human ally Bruno Carrera in petty rage. [[Film/TransformersDarkOfTheMoon Ultimately working with Sentinel Prime]] to enslave and decimate humankind, Starscream plays a key role in the takeover of Chicago by personally bombing the Autobots' ship and massacres any soldiers attempting to infiltrate the city, culminating his sadistic ways in toying with and trying to murder Sam and his girlfriend Carly Brooks-Spencer.

** [[StrawHypocrite Harold Attinger]] is a cold, calculating UsefulNotes/{{CIA}} operative who creates "Cemetery Wind" under the guise of protecting Earth. [[NotSoWellIntentionedExtremist 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 {{greed}}y sociopath who will endanger countless lives to satisfy his privileged, [[FantasticRacism hateful]] rhetoric against any life that isn't his own.

** [[BigBad Megatron]] is the leader of the [[Characters/TransformersFilmSeriesDecepticons Decepticons]] who defeated the [[Characters/TransformersFilmSeriesAutobots Autobots]] in the Battle of Mission City, gained possession of the [=AllSpark=], and captured Optimus Prime to keep him [[AndIMustScream frozen alive]]. After assimilating with the [=AllSpark=], Megatron intended to use its power to [[HostileTerraforming cyberform the Earth]] and [[KillAllHumans wipe out all of humanity]], while destroying any and all Autobots who get in his way. A gloating sadist, Megatron does not like to finish his opponents off quickly, as evidenced by when he tried to torture Bumblebee until he begs for mercy and later slowly beating Optimus Prime to death despite being more than powerful enough to take him out instantly. When the [=AllSpark=] became unstable and seemingly killed him, Megatron downloaded his consciousness into an interface module so he can enter Starscream's mind. During his time there, Megatron helped Starscream with a plan to use the mind-controlled President Allen to drive the Autobots off of the planet and destroy them with a nuke as they left, leaving humanity defenseless against any Decepticon attacks. Eventually, Megatron convinces Starscream to resurrect him so he can kill their enemies and conquer the Earth for himself.

** [[VideoGame/TransformersTheGameConsole Console video game]]: [[BigBad Megatron]] is the leader of the [[Characters/TransformersFilmSeriesDecepticons 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 [[HeroKiller kill Optimus Prime]] and get his hands on the Allspark, invading the Earth and [[KillAllHumans exterminating humanity]], before proclaiming that he is finished with Earth.
** [[VideoGame/TransformersTheGameDS DS video game]]: [[BigBad Megatron]] lacks his film counterpart's nobler traits and [[AdaptationalVillainy replaces it with raw brutality]]. Having plunged Cybertron into civil war after [[{{Patricide}} 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 [[UngratefulBastard 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 [[TheSocialDarwinist believed that the weak were only meant to serve the strong]].

** [[ArachnidAppearanceAndAttire 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 [[ForTheEvulz for fun]]. For certain victims, like Arcee, Airachnid would go out of her way to find people they cared for and murder them [[ForcedToWatch before their eyes]] as part of her fun. After the war left Cybertron, Airachnid struck out solo to pursue a new hobby: [[EgomaniacHunter hunting]] endangered and soon-to-be extinct species--or species she will make extinct--for sport and collecting grisly "[[CreepySouvenir 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, [[TheStarscream trying to usurp control from Megatron]] at times. Airachnid 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. Released from her stasis prison aboard the Nemesis, Airachnid takes control of Megatron's Insecticon army and attempts to lead a bloody coup to slaughter all Decepticons. Sadistic, merciless, and terrifying while enjoying her atrocities, Airachnid is one of the worst to wear the Decepticon logo.

* ''WesternAnimation/ChallengeOfTheGoBots''' "In Search of Ancient [=GoBonauts=]": [[EvilAllAlong 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 "[[OmnicidalManiac the loon that's going to bring the world to an end]]".

* [[TheDragon Starscream]] is the [[AmbitionIsEvil ambitious]] and power-hungry lieutenant of the [[Characters/TransformersFilmSeriesDecepticons Decepticons]], and shows himself to be the evilest member of Megatron's inner circle. A treacherous schemer who took over the Decepticons when Megatron disappeared on Earth, Starscream tricks a group of human astronauts into attacking the Autobots so they will be killed in the firefight and their information on Megatron's whereabouts silenced. When the moral Autobots avoid claiming the humans' lives, Starscream just murders the entire crew himself. Later [[Film/{{Transformers 2007}} staging the initial invasion of Earth]] in his quest for the All-Spark, Starscream has the likes of Blackout, Scorponok, and Barricade wreak havoc across the globe and murder hundreds of humans. After Megatron's revival, Starscream assists him in trying to [[KillAllHumans wipe out humanity]] with the All-Spark, and [[Film/TransformersRevengeOfTheFallen aligns himself with the Fallen]] to destroy Earth's sun, during which Starscream takes Sam Witwicky's parents hostage to achieve their plans. In between these atrocities, Starscream tries to flood Zambia and kill millions; devastates Rome to draw out the Autobots; and brutally murders his human ally Bruno Carrera in petty rage. [[Film/TransformersDarkOfTheMoon Ultimately working with Sentinel Prime]] to enslave and decimate humankind, Starscream plays a key role in the takeover of Chicago by personally bombing the Autobots' ship and massacres any soldiers attempting to infiltrate the city, culminating his sadistic ways in toying with and trying to murder Sam and his girlfriend Carly Brooks-Spencer.

* [[TheChessmaster Megatron]] is the cruel, ruthless [[BigBad leader]] of the [[Characters/TransformersAnimatedDecepticons Decepticons]] and the Autobots' worst enemy. A megalomaniac who [[TheStarscream 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, [[LackOfEmpathy uncaring]] when it nearly destroys an entire bridge filled with people. He tries to convince Soundwave to try and enslave or [[KillAllHumans 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 [[AndIMustScream 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.

** [[FauxAffablyEvil Colonel Leland "Silas" Bishop]] is the ruthless leader of MECH, a [[WesternTerrorists terroristic military group]] out to covet Cybertronian technology for their own ambitions. Capturing the [[Characters/TransformersPrimeDecepticons Decepticon]] Breakdown, Silas has him [[AndIMustScream vivisected while conscious]] to learn the secrets of Cybertronian biology. Allying with the sadistic Airachnid, Silas kidnaps Jack Darby's mother and uses her as a bargaining chip for his Autobot ally Arcee to turn herself in or else his mother dies--uncaring of keeping his end of the deal and letting Airachnid try to kill them. Creating "Nemesis Prime", Silas has it attack a military base to frame the Autobots as rampaging marauders--intending on creating an army of robots to help [=MECH=] be the established global military force. Revived by MECH and merged with Breakdown's body, Silas--now calling himself CYLAS--[[UngratefulBastard thanks them for their dedication and promptly slaughters]] them out of [[AGodAmI a newfound god complex]]. Slaughtering a military base to acquire a laser satellite for Megatron, Silas willingly attempts to doom humanity merely "for a place at Megatron's table".

* [[TheDragon Starscream]] is the [[AmbitionIsEvil ambitious]] and power-hungry lieutenant of the [[Characters/TransformersFilmSeriesDecepticons Decepticons]], and shows himself to be the evilest member of Megatron's inner circle. A treacherous schemer who took over the Decepticons when Megatron disappeared on Earth, Starscream tricks a group of human astronauts into attacking the Autobots so they will be killed in the firefight and their information on Megatron's whereabouts silenced. When the moral Autobots avoid claiming the humans' lives, Starscream just murders the entire crew himself. Later [[Film/{{Transformers}} staging the initial invasion of Earth]] in his quest for the All-Spark, Starscream has the likes of Blackout, Scorponok, and Barricade wreak havoc across the globe and murder hundreds of humans. After Megatron's revival, Starscream assists him in trying to [[KillAllHumans wipe out humanity]] with the All-Spark, and [[Film/TransformersRevengeOfTheFallen aligns himself with the Fallen]] to destroy Earth's sun, during which Starscream takes Sam Witwicky's parents hostage to achieve their plans. In between these atrocities, Starscream tries to flood Zambia and kill millions; devastates Rome to draw out the Autobots; and brutally murders his human ally Bruno Carrera in petty rage. [[Film/TransformersDarkOfTheMoon Ultimately working with Sentinel Prime]] to enslave and decimate humankind, Starscream plays a key role in the takeover of Chicago by personally bombing the Autobots' ship and massacres any soldiers attempting to infiltrate the city, culminating his sadistic ways in toying with and trying to murder Sam and his girlfriend Carly Brooks-Spencer.

* [[Film/{{Transformers}} 2007 film]]:

** [[Characters/TransformersPrimeUnicronAndTheTerrorcons Unicron]] is an [[AbusivePrecursors 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 [[OmnicidalManiac 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 [[UngratefulBastard 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 [[BarredFromTheAfterlife 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 "[[RightWingMilitiaFanatic 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 [[UngratefulBastard slaughtering them]]. He then, taking the name CYLAS--[[FunWithAcronyms "CYbernetic Lifeform Augmented by Symbiosis"]]--[[TranshumanTreachery betrays the human race to Megatron]]. Seeing himself as [[AGodAmI a superior being]], he razes a military base just to get Megatron's attention, then attempts to blow up everybody inside Raf's house.
** [[ArachnidAppearanceAndAttire 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 [[ForTheEvulz 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: [[EgomaniacHunter hunting endangered and soon-to-be extinct species]]—or species [[OmnicidalManiac 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, [[TheStarscream 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.