Peter Quill, alias Star-Lord, was born during an unusual astronomical phenomenon when many of the planets aligned. Seeing no resemblance, the man who believed he was Quill's father angrily accused his wife Meredith of infidelity and attempts to kill the infant, but died of a sudden heart attack. Quill was raised by his single mother, Meredith.
One day Peter returned home, bruised from trying to stop a bully. As he was washing up for dinner, his mother saw a bright light and two Badoon aliens emerged. Vowing to end the 'Spartoi bloodline', they killed Meredith. After Quill saw the aliens and his dead mother, he panicked and ran. As the aliens pursued, he grabbed a shotgun and managed to kill them with it. He then found a mysterious device in a closet. Seeing a bright light he fled the house, just before the alien ship destroyed it.
Quill was placed in an orphanage but escaped and eventually became a trainee NASA astronaut. An alien entity called the Master of the Sun eventually visited the space station that Quill and other astronauts were currently inhabiting, and offered the mantle of Star Lord (an interplanetary policeman) to a worthy candidate, Quill volunteered, but was rejected in favor of a colleague he once treated badly.
Quill was outraged, and NASA ordered his return to Earth and discharge for his conduct. Peter, however, stole a scoutship, and on returning to the space station took his colleague's place. Quill was then chosen to become Star-Lord, with the Master of the Sun first creating an illusion in which he was able to find and kill the aliens that murdered his mother to free him of his past. Equipped with a sentient vessel called "Ship", Quill commenced his role as Star-Lord.
It was later revealed that Peter Quill's father is Jason of Spartax, the second son of the galactic Emperor who acted as Star-Lord before him.
Star-Lord encountered the former Herald of Galactus, the Fallen One, who was trying to starve his former master by destroying all planets he could feed on, and was almost killed in his first battle with the entity, Ship discovered that the energy generated from destroying planets harmed the Fallen One. Sacrificing a little Kree lunar colony (35,000 lives) near a Kree planet the Fallen One was going to destroy, Ship was able to harness that energy and defeated the entity (Star-Lord's vessel "Ship" was destroyed doing it). Star-Lord turned the Fallen One and himself to the Nova Corps for Galactic level genocide. While there were divided thoughts about his choice, the pair were subsequently imprisoned in the intergalactic prison the Kyln. There, Peter allied himself with Ch'ak, Gladiator and Thanos against the Maker in fear of her immense power. They filled Thanos in on her background, and asked for his assistance, but he just walked out. Later, Peter observed a giant explosion in the Kyln, and assumed that it was Thanos who caused the Maker to attack. They went to the explosion site, and Gladiator filled Peter in on how he and the Maker got into the Kyln. When Gladiator asked Peter on how he got in the Kyln, he declined to answer.
Later, after Thanos had defeated the Maker, Peter found out that the Fallen One had escaped. He told Thanos about this, and Thanos went off, presumably to deal with it. Peter made his way around the Kyln and was met by Gladiator who was going to leave, now that the Maker was incapacitated for good. Gladiator told Peter that he had drafted Peter into the Shi'ar Guard, to Peter's disapproval. He met up with Gladiator's Shi'ar allies later on, and was told that they weren't going after the Fallen One nor Thanos, but that they decided they wanted Peter to help them.
A couple months after the Kyln and Xandar were destroyed in the first days of the Annihilation War, Peter organized the United Front with Nova Prime to battle the Annihilation Wave led by Annihilus from conquering their universe.
On the 183rd day of the war, Peter and Nova Prime were defending Daedalus 5 from the wave. They were aided by Drax the Destroyer, Gamora, Ronan the Accuser and his Kree warriors, and the former heralds of Galactus, Firelord, Red Shift and Stardust. They managed to hold the defense while the former heralds attacked and destroyed the mothership, and captured Extirpia. Days later, Peter filled in Nova about the health status of Firelord after he exploded fighting Extirpia. The two then interrogated Extirpia, who revealed that Thanos was working with Annihilus, and that they had defeated and captured Galactus and his current herald, Silver Surfer.
A few days later, Peter and Nova Prime met with the leaders of the Kree division of the United Front, House Fiyero and Ronan the Accuser. House Fiyero had some problems working with Ronan because Ronan was a fugitive from the Kree empire. They threatened to leave the United Front if Nova Prime and Peter didn't arrest Ronan. Nova Prime furiously shot down the demand, and a small argument erupted. Ronan then slaughtered all of House Fiyero, which angered Nova Prime. Just then, Gamora arrives with Praxagora and the news of Super-Skrull's death.
Just then, Ravenous, Terrax, Paibok, and Delinquent, and many more arrive on Daedalus 5 via Thanos' teleportation techonlogy and the United Front are forced into battle. Negative Zone Centurions later arrived as well, and so did an Annihilation Wave flagship, with a weaponized Galactus aimed to devour the planet. The United Front retreats while Red Shift and Stardust cover their escape, dying in the process. Peter, Nova Prime, Ronan, Gamora, the one-time Captain Marvel Phyla-Vell, Praxagora, the miraculously revived Super-Skrull and Drax's human companion, Cammi are among the few who escape. After the severe loss, the United Front disbands.
Later, Peter informs Nova Prime that Ronan is going to Hala to take down the rest of House Fiyero, and Praxagora and Super-Skrull would be going with him too. Peter suggests calling on the heroes of Earth, so Nova Prime then tries reaching the Fantastic Four, but his hopes for saving Earth are completely shattered when he learned of what was happening between the heroes. Peter then tells him that he'll be accompanying him on his next plan to attack Annihilus head on. Peter, Nova Prime, and Phyla-Vell all go to the ruins of the planet Xandar where they teleport and go deeper into Wave territory. On Canticus Prime, they meet up with Blastaar and his Spaceknights. They finally teleport their way the center of the Annihilation Wave, and they attack Annihilus head on. They were losing until the Quantum Bands that Annihilus acquired off the dead Quasar attached themselves to Phyla-Vell, turning the tide of the battle. She weakened Annihilus, and Nova Prime killed him. After the war was over, Peter was filled in by the rest of the factions that aided in destroying the Annihilation Wave. He told the stories to Nova Prime as he was recovering from the battle.
He was later assigned by Ronan to be in charge of rebuilding the Kree defense network. The Space Knights offered to upgrade Hala's defense systems with new tech and give them an army of Centurions. Peter pitched it to Ronan and Ronan quickly accepted the offer. Peter had the Spaceknights bring the Centurions to Hala for a few threat scenario exercises. However, the Centurions began to attack Hala, and when Peter confronted the Spaceknights about this, they revealed themselves and their "Trojan Horse"-like ploy. One of the Spaceknights broke Peter's arm and he was forced to flee. He fell out a window of a building while trying to escape.
Peter awoke after surgery on the Kree planet, Aladon Prime. He was removed of all his cybernetic attachments, including his left eye and his universal translator, and was briefed on the Phalanx's conquest of Hala and the rest of the Kree Empire. Admiral Galen-Kor, the person in-charge of Peter's recovery, revealed the Phalanx's plan to infect the Kree with an airborne techno-virus that would put the Kree under their control. Galen-Kor requests that, in exchange for nursing him back to health, he'd lead a commando team into Hala to destroy the machine that would release the techno-virus. He agreed, and he met with the team. The team consisted of prisoners that the Kree had caught over the years; there was a Kaliklak warrior known as Bug, a Shi'ar berserker codenamed Deathcry, the Celestial Madonna Mantis, a former Terran soldier that went by the name Captain Universe, a lower life form known as Rocket Raccoon, and a flora colossus that called himself Groot. Peter was given his old Star-Lord outfit, with a few upgrades. He trained the team for a couple of days until they were dropped off in Hala.
They infiltrated and were met with heavy resistance. The team was a pretty dysfunctional one, with Peter seeing them more as an expendable team rather than allies in battle. They sneaked through most of Hala, looking for the bio-tech reproduction facility, when suddenly a battle between some of Annihilus' remaining bugs and the Phalanx broke out. Deathcry jumped into the battle, revealing the rest of the team. During the battle, Deathcry attacked Captain Universe, and in an act of self defense, Captain Universe disintegrated Deathcry. The team retreated and was also forced to leave Groot behind as he covered their escape.
After two days of no luck finding the facility, Peter went alone on a reconnaissance mission to find it. He looked through classified Kree archives, and there he found that they had already released the virus as a airborne nanovirus — meaning that everyone on the planet were slowly becoming infected. He returned back to the sewers where he told the team of his plan. Not long after, they were attacked by the Phalanx. Captain Universe covered their escape and they made it out into the streets of Hala. However, Peter, Rocket Raccoon, Bug, and a tiny little Groot (who regrew after his destruction) were captured on the street not long afterwards. Mantis was able to turn herself invisible and Captain Universe defeated all of the Phalanx down in the sewers, so they weren't captured. Peter and his teammates were later about to be dissected by the Phalanx, but Mantis and Captain Universe saved them. They made their escape, only to find Kree soldiers in their way. The Kree soldiers decided to let Peter and company go due to Peter's reputation as the Starlord. Mantis explained to Peter that they risked the Kree soldiers threw away their lives to save his, because the Starlord was an ideal. They commandeered a Kree ship and flew out of Hala to Alon-Gin. There, he was debriefed on the outcome of their mission. Since Captain Universe got the genetic information of the virus when he was rescuing the team, the Kree were able to come up with a cure. Also, the team was clean of infection. The team came to Peter saying they were ready for the next assignment, despite Peter's clear unwillingness.
A few days later, Peter was back on Hala with his commando team. He had now become the secret leader of the anti-Phalanx resistance. Rocket reported to him that Blastaar had been captured, tortured and killed by the Phalanx, as per the plan. Blastaar brought with him spores that would map the entire Babel Spire, the heart of the Phalanx power. They got into the tower and set up the bombs that would cripple the tower, allowing the Kree empire to be accessible to outside forces. However, all of a sudden, a mind-controlled, resurrected Blastaar appeared and killed Captain Universe. Peter would've been killed too had it not been for the appearance of the Phalanx's leader, Ultron, who was enraged and wanted to torture somebody. Ultron tortured him, trying to get information on the anti-Phalanx resistance's plans, but Peter wouldn't give it up nor would the mind scans work, for Mantis was telepathically shielding him. Ultron later found Mantis and sent the Phalanx to attack her. Peter was physically drained, and passed out. He was awakened by Mantis, Bug, and Rocket, saying that they had a plan of escape. They ran through the Babel Spire and jumped out of the building. It was revealed Groot expanded and wrapped himself around the tower and detonated his body, and so the tower was destroyed. Groot was once again "killed" doing a heroic act. Mantis told Peter that she had foreseen that three members would be lost during the fight against the Phalanx, and the third she revealed to be herself. Just then, Ultron arrived in the body of Adam Warlock and struck Mantis across the head. Before Ultron could attack Peter and his crew, Nova Prime arrived with Gamora, Drax, and the Technarchy, and attacked Ultron and his Phalanx. Peter was leading his injured team away from the battle when he saw that the Phalanx were building another giant structure, which would turn out to be a giant version of Ultron. He watched as Phyla-Vell, now going by the name Quasar, and Adam Warlock (with his own consciousness back in his own body) attacked and defeated the giant Ultron.
The Kree empire was saved and everything slowly went back to the way things were. Star-Lord would hang out with Nova Prime, Gamora, and Drax once in a while. He saw to Mantis' and Groot's recuperation. Peter blamed himself for the Phalanx invasion, and so he sought to make it right.
Guardians of the Galaxy
After Ultron and the Phalanx were defeated, Star-Lord formed the new Guardians of the Galaxy. The universe was in a very fragile state after the two Annihilation events, and fissures in reality were beginning to form and spread. In order to prevent the collapse of the universe, he had Mantis telepathically nudge Adam Warlock, Phyla-Vell, Rocket Raccoon, Drax, and Gamora into joining his team . This motley crew set up base in the severed head of a Celestial, called Knowhere. When Star-Lord's deception was found out, everyone but Mantis quit the team in disgust and set off on their own quests.
Star-Lord responded to a Kree summons and returned to the Kree homeworld to speak with Ronan. Upon arriving, he is shocked to see that they are rebuilding the Phalanx Spire to protect Kree space. He argued with Ronan and was then thrown into the Negative Zone. He was then forced into helping the newly appointed ruler of the Negative Zone, King Blastaar, into taking over the Superprison 42 so he could gain access to their portal to Earth.
Star-Lord was then sent into 42 to convince them to open the door and surrender. Once inside he spoke with the unofficial leaders of 42 and told them not to surrender, but only Jack Flag agreed with him. They tried to stop them but the doors were opened and Blastaar's army was unleashed; after learning of his betrayal, Blastaar sent his men to find and kill Star-Lord. Running for their lives, Star-Lord and Jack Flag located a telepath in 42 to ask the Guardians for help and they were able to escape before being killed by Blastaar.
War of Kings
Once he returned to Knowhere, Peter found that Rocket had assembled a new team, consisting of Major Victory, Bugman, Groot, and Mantis. Eventually, the other members returned as well; Adam and Gamora returning in order to still help the universe, and Drax and Phyla returning with the newly resurrected Moondragon.
Their first order was to split up and attempt to end the War of Kings, which would cause irreparable damage to the fabric of the universe. Peter led his team to Hala to speak with the Inhumans. Even after telling them the dangers of their war, they refused. Phyla, who now called herself Martyr, had other ideas of negotiating and took Crystal hostage. Star-Lord could not get her to release her prisoner and they were teleported back to Knowhere.
Upon their return, they soon found themselves in the middle of a battle with the Inhumans and the Imperial Guard, who had followed the other team back. After rescuing Crystal, the Inhumans left and the Guardians were left to face the Imperial Guard, who wished to take over the station. In the process of the battle, Starhawk escaped her captivity and took Star-Lord, Mantis, Bug, Jack Flag, and Cosmo to her future.
In Starhawk's bleak future, she was finally able to convince them what she had been saying all along was true. A massive fissure was consuming the universe and it had to be stopped. The two Guardians teams worked together to try to send a message back through time to warn that the fissure, known as the Fault, was actually caused during the War of Kings by Black Bolt.
With their time machine broken, they formed a new plan. The Badoon, who now ruled what little was left of the universe, had enslaved the Celestials and created what was called the Celestial Engine, used to keep the fissure at bay. They send back their message and break the alignment of the Celestial Engine, causing the destruction of this future.
To Star-Lord's surprise, this did not kill them. They found themselves in a different time with a different set of Guardians. Another surprise: he was old enough to be his own grandfather. The Starhawk of this future received messages from his previous selves and learned the truth. The team was adrift in time, which was causing their changes as well. They formed a plan to find a time machine under Avengers Mansion, but once they got there they slipped through time once again. And again. And again.
They finally arrived at an alternate future, one ruled by the Magus and the Universal Church of Truth. While battling the members of the Church, they had an unexpected guest: Kang the Conqueror. He returned them to their normal states and took them to his headquarters in Limbo. He explained that all futures were becoming Magus futures and it was up to Star-Lord to stop this from happening.
Kang gave Peter a Cosmic Cube and told him that future must be saved at all costs. They were sent back to moments before Adam would turn into the Magus while repairing the Fault. Star-Lord tried to talk to Adam, but the damage had been done. He had overlapped the time lines and essentially he had been the Magus for months.
Adam transformed and began his battle with the Guardians, who were all reunited. After killing Major Victory, Mantis, Cosmo, Gamora, and Phyla, Star-Lord was finally able to grab the Cube and use it to revert the Magus back to Adam. Adam told him that he must finish him, and to his own regret, Star-Lord shot and killed his friend. The universe had been saved, but the price was very high.
Adam managed to avoid death, however, and Magus continued in his service to his Lord Mar-Vel, a Mar-Vel from a universe where death had lost and life had triumphed, resulting in a universe of immortal monsters. When the denizens of Lord Mar-Vel's universe, the Cancerverse came out of the fault in order to consume the 616 universe as well. Peter Quill, together with the rest of the Guardians, Nova, and Thanos traveled into the Cancerverse in order to stop Mar-Vel and the Old Ones whom Mar-Vel served. Drax, however, was driven mad due to the fact that he was an avatar of life in a universe where life had triumphed, and he tried to kill Thanos, who in turn vaporized him. The Guardians and Thanos met up with the Machine Resistance, the unliving robotic denizens of the Cancerverse who had been immune to Mar-Vel's conversion of his universe and had fought to stop him ever since. They informed Thanos and the Guardians that Mar-Vel was planning a Necropsy, in which he would kill the Avatar of Death (Thanos) thus killing Death itself. Thanos seemed to betray the Guardians when he submitted to Mar-Vel, but when Mar-Vel ran him through with a sword, Death appeared and, due to being summoned by Thanos, killed the entire Cancerverse and forced the Old Ones into a coma that would last a very long time. Death refused to take Thanos with her and he flew into a rage, vowing to destroy the universe. Peter and Nova volunteered to distract him, managing to keep him in the Cancerverse long enough for it to collapse and kill all three of them. The survivors hailed Peter and Nova as heroes and a statue was erected in their honor on Kree-Lar.
Thanos, Star-Lord, and Nova remained in the Cancerverse fighting over the Cosmic Cube. A returned Drax joined the brawl against the Mad Titan. After Star-Lord starting losing control over the Cube, Thanos offered Quill to give him the Cube, as he could control it to get back to Earth-616. However, Star-Lord killed Thanos with it. As Thanos reappeared and killed Star-Lord from behind, who also returned, the heroes discovered death was impossible in the Cancerverse, as one would merely respawn in another location.
After killing Thanos for a third time, the heroes' discussion on what to do was interrupted by the arrival of the Cancerverse's Revengers. Following an extremely long battle, the Revengers got hold of the Cosmic Cube. Thanos managed to retrieve the Cube and defeat the Revengers, but was soon opposed by Drax, Quill, and Nova. While the Mad Titan was distracted by Drax, Nova picked up the Cosmic Cube and decided to use it along with the Nova Force to open a gate to Earth-616. However, Rider couldn't come along as he was acting as the door between the two universes. As his last wish, Nova asked Peter not to tell Gamora about this event, as it would devastate her.
Peter Quill, Drax and Thanos were then returned to Earth-616.
Star-Lord and Drax reuinted with the other Guardians and they aided the Avengers to fight Thanos, who had once again targeted Earth following his return. Thanos managed to get a Cosmic Cube from the Army, with which he escaped to Moord, the homeland of the Badoon. The Guardians arrived at the Avengers Tower and informed the Avengers about the situation. They joined the Guardians to fight Thanos and the Badoon. After Thanos apparently killed the Elders of the Universe, to impose his supremacy, he became one with the Cosmic Cube and killed the Avengers and the Guardians as well. But actually they were sent to the Cancerverse along with the Elders. While there, Tony Stark found that Thanos' weapon wasn't actually a Cosmic Cube and that it had defects. They bargained with the Collector in exchange for a weapon capable of deactivating the "Cube" and return to Earth. The Avengers and the Guardians would let Thanos be defeated by the Elders. With the help of other members of the Avengers, Thanos was defeated and sent to punishment by the Elders.
After being alerted by his father, J'son, that a council of galactic empires had decided that Earth should be left untouched by all, the Guardians fought a Badoon invasion on Earth. They were briefly imprisoned by Spartoi forces after defeating the Badoon in London, but managed to escape, becoming fugitives of the Spartoi Empire.
Attack of the Spartoi
Star-Lord was later captured by the Spartoi, and his fellow Guardians were all sent to other places across the galaxy for their own separate punishments. Soon after being captured, Quill was saved by none other than Captain Marvel. After exposing King J'son for who he really was and starting a rebellion, Peter Quill and Captain Marvel went around the Galaxy picking up their teammates, all except newly-inducted Flash Thompson who went into hiding after escaping a run-in with the Skrulls.
After sneaking into an orphanage to search for a gem left behind by the Spartax, Peter was confronted by a group of Badoon bounty hunters. Outnumbered, Peter was captured by the Badoon. While imprisoned, Peter discovered that a mysterious "Mr. Knife" placed the bounty on his head and that he also had plans for Earth. Soon after, Peter escaped the ship with the gem only to come face-to-face with the commander of the Spartax Royal Guard who turned out to be the sister he didn't know he had, Victoria. She turned him in to Fortress Viderdoom for the reward money, but quickly turned on Quill's captors to help him escape and steal Viderdoom's assets. The siblings escaped the planet together, narrowly avoiding death. When back on her ship, Victoria offered half of the money to Peter but he declined it, saying he was in it for the adventure.