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The cover of issue #3 shows that the original mini-series was in the same continuity as Marvel's superheroes. This was soon forgotten when the series became ongoing, but the shared universe between Transformers, G.I. Joe, and the superheroes was later relabelled Earth-91274 by Marvel Comics to separate it from the company's primary continuity.
|Publisher||Marvel Comics, IDW Publishing, Dreamwave Productions, Devil's Due Publishing, Fun Publications|
|First appearance||The Transformers #1
|Base(s)||Homeworld: Kaon, Cybertron
Other: Chaar, the Victory (G1), the Megastar (RID), Decepticon City (G1), the Nemesis (G1, ROTF, Animated, SG, Prime).
Megatron/Galvatron (stated in exodus and the cartoon), The Fallen (in the movie series)
See: List of Decepticons
The Decepticons are usually depicted as the antagonists in the fictional universes of the Transformers storyline and related comics and cartoons, and the enemies of the Autobots. The villains take many forms, and have many different origins and stories across the numerous different Transformers media, but in almost all incarnations, they are led by Megatron. They are typically represented by the purple facial insignia they all wear. Primarily, Decepticons have red eyes, while Autobots have blue eyes. They are usually known for their air power, especially since many of them turn into aircraft. They often turn into military vehicles, construction vehicles, and even smaller-than-human-sized objects.
In the Japanese version of the franchise, the Decepticons are called Destron or Deathtron (Japanese: デストロン Desutoron). The one exception to this naming convention is Car Robots, where the sub-group referred to as "Decepticons" in the Robots in Disguise adaptation, is known in Japan as the Combatrons (the Japanese name of the G1 subgroup known as the Combaticons). The overall name of the Robots in Disguise villain faction is Destronger. However, the Japanese Version of Transformers Animated uses Decepticon (ディセプティコン).
Transformers: Generation 1 
The evil Decepticons are from a race called Transformers - robots that can change into vehicles, mechanical devices and even animal forms. They waged war for eons on their home planet of Cybertron against the heroic Autobots. Both factions needed supplies, and select numbers from each side intended to get them. The Autobots weren't looking for a fight with the Decepticons, but they get one out in space anyway. When the Decepticons board the Autobots' ship it takes a beating and crashes onto Primitive Earth and knocks everyone unconscious. Millions of years later, in 1984 a volcano eruption causes a probe to give them all new forms which come from vehicles in the surrounding area. After the featured film The Transformers: The Movie, Megatron was reformed as Galvatron, and Optimus Prime was replaced for a time by Rodimus Prime, only to return later on.
Unlike the Autobots, whose leader is a Prime bearing a Matrix, the Decepticons are led by the most powerful of their ranks (usually Megatron). This tends to cause some conflict, given how generally every Decepticon thinks that they're the most powerful. Also, the Decepticons are not exactly the most compassionate beings in the universe, but not all fight for greed. More than a few have a sense of honor, while others believe that Cybertron would be better protected by aggressive expansion. Ultimately, the Decepticons desire to protect their homeworld, even if it is at the expense of others.
Hasbro toyline 
Hasbro launched the Transformers toy line with ten different Autobot characters, all of whom transformed into automobiles, while the ten distinct Decepticons, (seven packages as three came two to a box/pack) were weapons, aircraft and communications equipment. Many of the Transformers were based on Takara designs. Optimus Prime was among the first Transformers released from Hasbro in 1984. The character listing/mini-poster that came inside Transformer packaging identified him as "Autobot Commander", as contrasted with Megatron's title of "Decepticon Leader".
Marvel Comics 
In the Marvel comic continuity, it was established that the Decepticons came in and out of the gladiator pits on Cybertron. Early on, the leadership of the Decepticons constantly changed due to their tendency to kill and replace their leaders. It would not be until a lowly Decepticon affiliated gladiator named Megatron assumed the throne that the Decepticons became a true threat to the rest of the population of Cybertron.
While Megatron was the primary leader, other Decepticons had prominent roles as leaders of the group. Shockwave, Scorponok, Bludgeon, and Ratbat all led the Decepticons, often overthrowing Megatron in the process or taking over the group during the period when Megatron was believed dead.
In the G2 Marvel series (which continues from the G1 Marvel series), it is stated that the Decepticon forces on Cybertron underwent a massive split in the wake of Megatron's disappearance when Megatron, Optimus Prime, and their respective troops crashed on Earth. The smartest, strongest, and most intelligent Decepticons left Cybertron to colonize nearby galaxies, leaving a token leadership of overly cruel and duplicitous Decepticons to control Cybertron. These Decepticons who left their homeworld became "The Second Generation" Decepticons, who were led by the villainous Liege Maximo. On the final page of the last issue, the Liege Maximo indicates that the Decepticons and all their descendants came from him, which indicates that he is the original founder of the Decepticons.
Animated series 
The Decepticons are a malevolent race of robot warriors, brutal and merciless. The Decepticons are driven by a single undeviating goal: total domination of the universe. In the war that raged between the Decepticons and Autobots for millions of years, their home planet of Cybertron was drained of its once rich sources of energy. In hopes of finding new reserves for making Energon, their basic fuel, the Decepticons followed the Autobots to Earth. Under the leadership of the ruthless Megatron, they continued their efforts to destroy the remaining Autobot forces. They attacked throughout the Earth and in space, using their underwater Decepticon headquarters as their staging base and bunker. But, by the year 2000, the Decepticons had proven to be the losers of the last great war. In an attempt to bolster the Decepticons' strength, the evil planet-gobbling world, Unicron, reformed Megatron into a new robot named Galvatron to lead the Decepticons in a new era. Now, in 2006, the Decepticons have retreated to a burned out hulk of a planet called Chaar, a world of ash and ruin. Galvatron and his Decepticon lieutenants, the sleek and awesome Cyclonus, and the mighty Scourge, the master of the dreaded Sweeps, strike fear throughout the universe. Their ultimate goal: to reconquer Cybertron and destroy the Autobots.
In the original animated series continuity, the Decepticons owe their warlike ways to their faction's origin as military hardware robots, created by the five-faced aliens, the Quintessons, while the Autobots were designed as consumer goods. Following the rebellion that forced the Quintessons off the planet, the Decepticons - as they named themselves - lusting for power, began a civil war. The Autobots could not hope to match the superior firepower and battlefield powers of the Decepticons, and instead turned to stealth, developing the art of transformation, modifying their bodies so that they could assume other forms. With this additional power, the Autobots were able to win the conflict, and a period of peace began, known as the Golden Age of Cybertron, when energy was plentiful and the planet shone with a golden hue.
Working in secret, the Decepticons also developed transformation technology, along with new robot-mode flight powers, and, under the command of one of the first of this new breed, Megatron, they attacked one of the capital's outer cities, killing the current Autobot leader. As the knowledge of this act was not made public, younger robots continued to idolize these powerful new flying robots - until one such young robot, Orion Pax, was duped by Megatron into allowing him access to an energy storage facility. Megatron turned on Pax and fatally injured him, but the ancient Autobot, Alpha Trion, then rebuilt Pax into the first of a new, battle-hardy breed of Autobot - now, he was Optimus Prime, leader of the Autobots, who led them against Megatron and the Decepticons as the civil war erupted once more.
After five million years, Cybertron was nearly depleted of all its energy when the Decepticons received word that the Autobots were planning to search for new energy resources. Following the Autobot ship, the Ark, in their ship, the Nemesis, the Decepticons boarded the Ark and engaged the Autobots on their ship. Unfortunately, the Ark drifted too close to Earth and crashed landed in a volcano. All the occupants of the Ark went into emergency stasis, while the Decepticons on the Nemesis ejected to South America. There, they scanned the forms of local insects, becoming the Insecticons. After 4 million years, the volcano the Ark was wedged in, erupted in Earth year 1984, restarting its computer, Teletraan I. Sending out Spy Satellites, Teletraan created alternative forms out of Earth vehicles for any transformers caught in its scanning beam (Like F-15 Eagles for Skywarp and a Semi-trailer truck for Optimus Prime). The Decepticons awakened first but later the Autobots did too, thanks to Starscream's carelessness.
By the Earth year 2005, however, the Decepticons had succeeded in completely conquering Cybertron. In a final attempt to destroy the remaining Autobots they attacked Autobot City on Earth but were defeated. On their way back to Cybertron Astrotrain encountered difficulty leaving Earth's gravity due to an over-large payload. Starscream convinced the others to jettison all the damaged and dying decepticons, including Megatron. Megatron was then found by Unicron who offered to rebuild him in return for destroying the Autobot Matrix of Leadership. Megatron was reformed into Galvatron who returned to Cybertron, destroyed Starscream for his treacherry and reassumed command of the Decpticons. Galvatron then attempted to use the Matrix against Unicron, provoking him into attacking Cybertron. The attack coupled with the temporary loss of Galvatron shattered the decepticon forces, allowing the Autobots to reclaim their home planet. The Decepticons fled to the planet Chaar, a world of ash and ruin, where they struggled to survive until Galvatron returned to them and reorganized them into a fighting force, battling to take back Cybertron.
Dreamwave Productions 
After Autobot leader Optimus Prime and Decepticon leader Megatron disappeared in a Space Bridge accident several million years ago, the Autobots and Decepticons split up into several factions. One of those who broke away was Ratbat, who quickly took the opportunity to form his own power base. Gathering loyalist followers and setting up their HQ in the Polyhex region of Cybertron the Ultracons quickly came into conflict with the Autobot splinter faction The Wreckers. However, Ratbat added a secret weapon to his ranks - the combiner team the Constructicons, in flagrant defiance of treaties banning their use in the civil war as both Autobots and Decepticons splintered.
When the Ultracons attacked the Tagan Heights in order to seize its factories for themselves, they were opposed by the Wreckers. Ratbat quickly unleashed the Constructicons in their combined form of Devastator, routing the Wreckers. However, Ratbat was prevented from executing his rival Springer by the arrival of the Protectobots in their combined form of Defensor. The Autobot combiners were hoping to prevent an arms race between the various factions by stopping combiners signing up with the factions. After the battle devastated the very manufacturing facilities the two factions hoped to acquire, the Protectobots separated and defeated Devastator via sabotage. With their most potent weapon gone, the Ultracons retreated.
Later, the Ultracons joined with the Decepticons under Shockwave to support a peace accord with the Autobots, fighting off Starscream's Predacon faction. However, Megatron's return with an army of Seeker clones would bring a halt to the peace proceedings, and the Ultracons would be reabsorbed into the Decepticons.
IDW Publishing 
The origins of the Decepticons in the IDW continuity would be explored in The Transformers: Megatron Origin, which confirmed Megatron as their founder in this timeline. On the run after an attack on an Autobot Senator after a mining dispute, Megatron stumbled onto underground gladiator games in the state of Kaon and quickly became one of its rising stars. However, it only truly became more than this when Ratbat, seeing an opportunity for profit, dispatched Soundwave to arm the gladiators. Megatron's forces then began to commit acts of terrorism increasing in scale and daring, attracting the attention of Sentinel Prime. Kidnapping Senator Decimus as a symbol (with the help of new airborne recruit Starscream) Megatron issued a rallying call to the gladiators and their supporter, promising to unite them under one badge and make the whole planet their arena. Prime's forces then found and arrested them en masse. This was all part of Megatron's plan: a supposedly informant Starscream massacred the Autobot Senate and freed the prisoners, signalling revolution and anarchy in Kaon. Megatron eventually killed Prime one-on-one as a symbol, and the Decepticons were forged.
In this continuity, there are a number of differences to the traditional norm. The Decepticons are no longer based on Cybertron due to its devastation by rogue scientist Thunderwing. Instead, they have spread out through the galaxy, using their transforming abilities to infiltrate target worlds (such as Earth or Nebulos) disguised as local vehicles and equipment. They then use their modes to create conflict, leading to complete anarchy as the world's political and social systems collapse. The Decepticons then move in and harvest the world's raw resources. How the world is pacified is unknown, although The Transformers: Spotlight issue on Sixshot revealed he is often sent in to complete the destruction of entire worlds. As in other continuities, Megatron is in command, and thus far has had to deal with the rebellion of Starscream's Earth infiltration unit and the reemergence of Thunderwing, as well as moving on to Earth in order to harvest the extremely powerful Energon variant Ore-13, something which promises to give the Decepticons a significant edge over the Autobots.
Beast Era 
The Decepticons eventually evolve into the Predacons, a faction in the fictional Beast Wars universe created by Hasbro. Previously the name Predacon had been associated with the Transformer group which combined to form Predaking. The faction made their first appearance in the Beast Wars toyline and animated series, and have been represented in various Transformers animated series, comic books and toylines since. A Predacon is most commonly represented as a Decepticon descendant with a new smaller, more energy-efficient body. Though the Decepticons and Predacons share many similarities, several important differences exist, such as leadership and ideals (for example, choosing a pretense of peace with the Maximals rather than maintain a war at all costs). It is not completely known as to how the faction gained predominance over all the other various Decepticon factions, although the comic book miniseries Beast Wars: The Gathering has provided hints that their heritage may be found in the original combiner team Predacons, hints confirmed by the subsequent Timelines: Dawn of Futures Past, which confirmed that Razorclaw, Divebomb and the other Predacons had been working behind the scenes.
Transformers: Robots in Disguise 
In Transformers: Robots in Disguise, the Decepticons were not the name of the evil faction, but rather a sub-faction created by Megatron. The main faction was instead the Predacons (carrying the name of the main villains over from Beast Wars), who transformed into mechanical animals. Realising that their ability to travel as Earth vehicles gave the Autobots an edge in stealth, Megatron decided to take drastic action.
Megatron recovered the protoforms of six Autobots that had crashed to Earth some time before looking for Fortress Maximus. Scanning them with vehicle modes at a military base and infusing them with a fraction of his spark energy to ensure their new loyalty, the first five became the Commandos. But when Megatron tried to scan a tanker truck as an alternate mode for the leader Scourge, Optimus Prime was scanned as well, resulting in much of Prime's personality being scanned as well. With an infusion of Megatron's spark energy to complete the concoction, Scourge was born, emerging from his pod as a dark twin of Optimus Prime, who proved that Megatron's programming had over-ridden any Autobot goodness within him. Appointed leader of the new "Decepticons", they quickly established themselves as a force to be reckoned with.
The newly created Decepticons would try many schemes over the course of the series, including attacking various dams and faking their defection to the Autobots. But their leader, Scourge, had grander ambitions in mind. The copy of Optimus' personality had been warped by Megatron's evil influence, but the individuality of Optimus remained and Scourge now wanted to control both Predacons and Decepticons. He would seize his chance when Fortress Maximus was awakened, directing him to destroy Galvatron (Megatron's new form). The attempt failed and Galvatron took a terrible revenge - he stripped the Decepticons of their individuality, turning them into little more than drones. After Galvatron's defeat by Omega Prime, the Decepticons were among those sent back to Cybertron for imprisonment, except for Sky-Byte.
Unicron Trilogy 
In the Unicron Trilogy continuity, the early history of the war is not expounded upon. The Decepticons, however, remain the main antagonists, with whom the Autobots have been warring for quite some time. The enslavement of the small, power-enhancing Mini-Cons has long been a major goal of the Decepticons, and the Mini-Cons are seen as key to winning the war.
Near the end of Armada, the Autobots and Decepticons join forces to defeat the planet-devouring Unicron, and the beginning of Energon sees them as uneasy allies. Many return to Megatron's side when he returns.
Cybertron sees a much smaller Decepticon force than the previous two series, and what has become of most of the survivors of the earlier series remains unknown. As Megatron's true plans are discovered, most of the Decepticons, unwilling to be sacrificed as pawns as their leader seeks to remake the universe, again battle a common foe alongside the Autobots. The end of the series sees three of the comic-relief characters, with a reluctant Thundercracker, desiring to begin a new Decepticon force, and take off in a makeshift rocket. It makes it as far as Mars before it crashes, as the ending credits montage of the final episode shows. The foursome survives, however. The fates of the other surviving Decepticons remains unknown, though evidence of Starscream's survival is discovered.
The Decepticons make an appearance in the 2007 the Transformers live-action film. They include Megatron, Starscream, Frenzy, Blackout, Barricade, Scorponok, Brawl and Bonecrusher. The Movie Prequel comic by IDW Publishing would reveal their origins. Originally Optimus Prime and Megatron ruled Cybertron together, due to the power of the Allspark, a mysterious device that could give life to Transformers - and keep Cybertron itself alive. Eventually, Megatron began to desire its power for himself and assembled a like-minded army of separatists - the Decepticons. Megatron soon struck, and Cybertron became embroiled in civil war. This would later seem to be changed, however, by the sequel films, where it is revealed that Sentinel Prime was the leader of the Autobots and The Fallen the leader of the Decepticons when the war broke out. Optimus would only take command after Sentinel was seemingly killed in action and Megatron served as The Fallen's field commander due to the latter's incapacitation. The subsequent prequel novel Transformers: Ghosts of Yesterday revealed that Starscream seized command of the Decepticons after Megatron's disappearance.
Like the Autobots, the Decepticons are designed to look more organic in the movie. While the Autobots have a more human-like physiology, the Decepticons are more monstrous and insect-like in appearance. In Transformers: Revenge of the Fallen it is revealed that The Fallen, a Prime who turned evil, is the founder and the true leader of the Decepticons, not Megatron. This would seem to imply the Decepticons were originally Autobots who turned evil. In the final battle in the second movie, there are many Decepticon casualties including Devastator (destroyed by a rail gun), Mixmaster (cut in half and his head stomped off by Jetfire), Rampage (killed by Bumblebee), Ravage (Stripped from his spine by Bumblebee), Scrapper and Long Haul (killed by an airstrike), Scorponok (head crushed by Jetfire) and the Fallen himself whose spark is ripped out and crushed by Optimus Prime. Also killed in the movie are Sideways and Demolisher, killed at the beginning by Optimus and Sideswipe. Megatron officially takes full command of the Decepticons at this point, swearing vengeance.
The Decepticons return in Transformers: Dark of the Moon with the plan to use a Space Bridge to bring an army to Earth and transport Cybertron into orbit to rebuild the planet with Earth's natural resources and human population as slaves. Megatron and Sentinel Prime planned this a long time ago, planning to meet on Earth before Megatron went after the Allspark and ended up frozen and the Ark was shot down by Decepticon fighters (few Decepticons knew of the plan) and crashed on Earth's Moon in 1961. This was detected by the Americans and the Russians and the space programs were created to reach the ship and study it. However, by 1963 the Decepticons had raided the Ark and removed all but five of the pillars and hid them on the Moon along with an army of hundreds of Decepticons, awaiting the time that the pillars would be used. After humans successfully reached the Moon and explored the ship, Soundwave and Laserbeak approached various humans including Dylan Gould's father to get them to shut down the American and Russian space programs.
The Decepticons established a network of human collaborators who kept the humans from noticing the Decepticons actions on the Moon, later led by Dylan Gould. After a human collaborator named Alexi Voshkod leads NEST to Chernobyl where they retrieve an engine part from the Ark, the Decepticons reemerge for the first time since Egypt in the form of Shockwave and his Driller who attack, but retreat. This leads the Autobots to retrieve Sentinel and the remaining space bridge pillars and revive him and as this is going according to plan, Megatron orders Laserbeak to kill all the human collaborators but Dylan Gould which he does. Before he's killed, one of the collaborators named Jerry Wang alerts Sam Witwicky to this and he alerts NEST which ignores it. Sam and Seymour Simmons find out about the Decepticons plot from pictures a Russian probe got of the Decepticons hiding the pillars and the Dreads are sent to attack the convoy protecting Sentinel, but are killed by Bumblebee, Dino, Sideswipe and Ironhide.
After Sentinel reveals his true colors and murders Ironhide, he sets up the pillars in the National Mall and brings the Decepticon army consisting of hundreds of Decepticon soldiers and Decepticon ships to Earth. With the army in hand, the Decepticons promise to bring no war against the human population in exchange that the Autobots must leave Earth. While taking off into the atmosphere, Starscream destroyed the ship, knowing that mankind will resist on their own. Some of the Decepticons scatter around the world to set up the pillars, but most of the army invades Chicago, devastating the human population and taking over. The Autobots, NEST and a team of mercenaries led by Sam Witwicky and Robert Epps invade Chicago and battle the Decepticon army, aided by the United States Army, and U.S. Air force. The group manages to take out much of the army including Laserbeak (killed by Sam Witwicky and Bumblebee), the Driller (killed by Optimus), Starscream (killed by Sam Witwicky), Soundwave (killed by Bumblebee), Barricade (killed by NEST) and Shockwave (killed by Optimus) and disrupt the Control Pillar, forcing Sentinel into battle. The combined human and Autobot forces overwhelmed Sentinel and his remaining forces and Tomahawk missiles destroy most of the Decepticon fighters causing Sentinel to flee before engaging Optimus one on one as Dylan Gould reactivates the space bridge. Sam Witwicky kills Gould and Bumblebee and Ratchet destroy the Control Pillar, causing Cybertron to implode and ruining the Decepticon plan. Also, the remaining Decepticon ships are sucked up into Cybertron by the space bridge and are presumably destroyed with the planet.
Sentinel nearly kills Optimus, but Megatron, convinced by Carly Spencer that he would end up working for Sentinel, saves Optimus and incapacitates Sentinel. Megatron offers a truce between the Autobots and Decepticons after Cybertron is destroyed as long as he's in charge of the Decepticons again, but Optimus refuses and kills Megatron and Sentinel. While the loss of human life in Chicago is massive, the battle is a major victory for the Autobots as they eliminated most of the Decepticon army on Earth despite there being some still scattered around the globe and the entire Decepticon command structure was destroyed with all of its members killed in the battle.
Transformers Animated 
In Transformers Animated, the Decepticons are usually bigger than the Autobots and usually turn into jets and military vehicles. It takes a group of Autobots to defeat one Decepticon and almost all Decepticons have red eyes and can fly. Most Decepticons in the series are similar to the original G1 series. In the Animated Series Blitzwing, for example, retains his triple changer modes of a tank and jet and also retains his G1 tan and purple color scheme.
This series depicts a Decepticon force that is far from what it apparently once was, with Megatron having been chasing the Allspark for millions of years prior to the series' beginning. The Decepticons have been "wandering the periphery" for some time, but have been driven off of Cybertron long ago. These Decepticons see themselves as "freedom fighters", seeking to throw off "Autobot tyranny", and their plans tend to revolve around returning to Cybertron with the means to retake it.
Transformers: Timelines 
A series of stories printed by Fun Publications, set in a variety of continuities, the Decepticons of alternate worlds can vary greatly from the classics Decepticon image. In the Transtech storyline, the Autobots and Decepticons are merely political factions on a Cybertron which never broke out into war. Lines between good and evil are more blurred.
In the Shattered Glass storyline, a group of Decepticons, led by Megatron, are the mirror images of the personalities of most Decepticons. In this world the Decepticon logo is red, and worn by heroic Transformers who seek to protect the weak and oppressed from the evil Autobots.
Transformers: Prime 
The main group of Decepticons (also referred to as simply "Cons"), lead by Megatron, in the 2010 computer animated series Transformers: Prime is much larger than in most continuities and are opposed to Team Prime.
In Transformers: War for Cybertron and Transformers: Fall of Cybertron, Megatron has come across a legendary element called "Dark Energon". He infiltrates Starscream's space station in order to corrupt himself with it. He then kills the Autobots' leader Zeta Prime and obtains the Omega Key, which then activates Omega Supreme. After Megatron defeats Omega Supreme, he goes to Cybertron's core and corrupts it with Dark Energon. Optimus Prime becomes the new Autobot leader, and heads into the planet to rescue Omega Supreme. He opens the Omega Lock into the core after Ratchet purges the Dark Energon corruption. Optimus discovers that he is too late to save Cybertron from the Dark Energon corruption, and the core must shut down for about one million years to survive. Optimus is giving a piece of Cybertron's spark for safe-keeping (The Matrix of Leadership). When Optimus evacuates the Autobot forces from Cybertron, Megatron tries to stop them from leaving. Silverbolt, Air Raid, and Jetfire try to stop it, but the space station transforms into Trypticon and crashs on Cybertron. Optimus and his Autobots then defeat Trypticon. Megatron has Trypticon rebuilt into the Nemesis. The Nemesis pursues the Ark, and then Megatron shoots Bumblebee. They go into a space bridge, and leave Cybertron to a lifeless wasteland.
By the time of Transformers: Prime, it has been three years since the Decepticons last attacked Earth and the Autobots still await their return. After the death of Cliffjumper, the Autobots fight to protect the Earth from the Decepticons and befriend three young humans while preparing for the return of Megatron, who has been missing for three Earth years. Megatron plans to use Dark Energon to raise an undead army of Cybertronians and defeat the Autobots. The Autobots destroy his space bridge and Megatron is believed killed in the process. Starscream becomes the new Decepticon leader.
After Megatron's apparent death, new Decepticon leader Starscream does not stray from Megatron's path and recruits several new Decepticons. Starscream attempts many missions to destroy the Autobots and find their headquarters, while keeping a shard of the "last" remaining Dark Energon that he took out of Megatron's chest. In the episode "Out of His Head", Megatron returns after an incident where he Takes control of Bumblebee's mind. Megatron then reclaims leadership of the Decepticons, keeping a strict eye on Starscream. After Starscream uses Megatron's share of Dark Energon, he tries to find more to once again bring back his "un-dead army". At the end of the episode "Partners", Starscream became an independent and hasn't been seen or heard from ever since. During the final four episodes of the season, the Autobots unwillingly team up with Megatron to battle a legendary threat to Earth's existence, Unicron. To defeat Unicron, Optimus uses the Matrix of Leadership. With this sacrifice, he not only loses the Wisdom of the Primes but also his memories of the war and his comrades, and joins Megatron as a Decepticon under his old name, Orion Pax. Orion would decode relics. The Autobots would save him and regain his memories, but the Decepticons continue to search for the relics Orion did decode throughout Season 2. When Optimus possesses the Star Saber, Megatron replaces his arm with an Ancient Prime's arm, so he could use the Forge of Solus Prime to turn a hunk of Dark Energon into the Dark Star Saber. Megatron destroys the Star Saber. Defeated, Optimus Prime retreats, and then decodes the final four relics, the Omega Keys, to regenerate Cybertron.
The Autobots got the first key, Knock Out got the second, and Starscream got the third. The fourth and final one was inside Smokescreen the whole time. After the Decepticons kidnap him, Knock Out uses the phase shifter to get it out of him. After finding out the purpose of the keys, by using the cordical pyschic cordial patch on Smokescreen. When Megatron leaves Knockout alone with him, Smokescreen and Knockout fight over the phase shifter. He sticks Knockout in a wall and leaves him there. He takes the one the Decepticons had and his and escaped the ship, starting a free fall battle. After, he went back to the base. Starscream them went to steal the three the Autobots had. Starscream, now with all 4, uses them as a peace offering to rejoin the Decepticons and Optimus was pretty angry about it.
Dreadwing, angry that Megatron allowed Starscrean to rejoin the Decepticons, give Optimus the Forge of Solus Prime, and attempts to kill Starscream but is killed in the process, by Megatron. Knockout and Starscream use the keys and find out the location of the Omega Lock, Optimus already knew its location and turns the Goundbridge into a spacebridge, and reforges the Star saber. They go to Cybertron, fighting off the Decepticons with relics, take back to keys and kill all the Vehicons. They go to the Omega Lock. Sadly, it's a victory short lived, as the Decepticon force them to give them back the keys, or they will expose Jack, Miko, and Raf to Cybertron's toxic atmosphere. The Autobots give them the keys, with Megatron uses to rebuild the Hall of Records, then he opens a space bridge, and tries to terraform Earth into a new planet called New Kaon. Optimus takes his Star Saber and cuts off Megatron's arm and destroys the Omega Lock, leaving Cybertron in its liveless state forever. They retreat back to Earth, only to find that Jasper, Nevada has now been changed into a giant fortress. The Nemesis lands there, and Optimus discovers they gave found there base. Vehicons start attacking the base. Wheeljack and Agent Fowler try and hold off the new Vehicons. Optimus has Team Prime split up to different parts of the country. Ratchet was last asking Optimus where he would go, Optimus said he would stay behind and destroy the groundbridge, so the Decepticons would not find them. Outside, Wheeljack's Jack Hammer is shot down by Starscream. The Decepticons blow up the base with Optimus inside. Agent Fowler and June Darby watch in horror. Megatron and Starscream go the remains of the base. Laughing about their victory, as the screen pans over to see Optimus's arm sticking out of the rubble.
See also 
- List of Decepticons
- Seekers (Transformers)
- List of Predacons
- List of Autobots
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