Hello, people of Earth, laptops, and home computers. In my time of boredom, I have come up with an idea that may either be my best one yet, or biggest risk.

I am a fan of loads of things. In this case, The Avengers, Mass Effect, and Halo. Three franchises that have left a great impact on us all. So, I came up with this.

Set mainly in the Marvel Cinematic Universe, there are a few noticeable changes here. To clear that up, may I present a timeline:

- Early History (various unknown dates):On the planet Rannoch, the Quarians create a race of networked artificial intelligences called the Geth to act as laborers and tools of war. The Geth's growing sentience brews paranoia in the Quarian people, and the Geth eventually begin questioning their masters, prompting the Quarians to exterminate them. The Geth, in self-defense, fight back and drive the Quarians off of Rannoch, forcing them to leave their system in the Migrant Fleet. The Quarians spend the next two-centuries as nomads, relying on whatever resources they can find. Because of the sterility of their fleet, the Quarians' immune systems are critically weakened and they are forced to wear environment suits. Lacking faster than light travel, the Quarians wait out time between travels via suspended animation.

During their travels, the Quarians come into contact with their first alien race: the Kryptonians. Despite their attempts at peaceful contact, the Quarians are met with extreme hostility, as the Kryptonians are vile, genocidal warlords. A brief civil war ensues, devestating much of the Quarian fleet and leaving the Quarians few in number. They barely escape with their lives.

- 1984: (Everything that happened in the MCU before this date are the same, such as the Asgardians' war with the Frost Giants and Captain America's exploits in World War II) S.H.I.E.L.D. creates the SPARTAN Program, a top-secret operation where S.H.I.E.L.D. attempts to create new super-soldiers, more advanced than Captain America. Eventually, however, the project is deemed a failure and shut down.

- 1987: The Quarians arrive in the Sol System, and their presence is detected by NASA. While the Quarians are initially weary of the Humans, due to their physical similarities to the Kryptonians, the Quarian Admiralty Board, the leadership of the Quarian people, meet with the world leaders to discuss first contact. The world leaders learn that the Quarians were driven from their home planet by the Geth, and no longer have a home planet. After months of deliberation, the world leaders allow the Quarians to settle on Earth, giving them the continent of Australia. Since the Quarians are so few in number compared to humanity, Australia has more than enough room. While interaction between humanity and Quarians is awkward at first, the two races come to peace over the years.

The advanced technology of the Quarians allows humanity to jump forward several decades, allowing them spaceflight and terraforming. In just a few years, they are able to set up colonies on the moon, Mars, and various other satellites in the Sol System. The Quarians eventually integrate into the various Earth governments, such as S.H.I.E.L.D.

- 1989: Culver Academy, a space station/premier college, is set up in orbit around Venus.

- Early 1991: A S.H.I.E.L.D. team run by scientists Catherine Elizabeth Halsey and Daro'Xen create the SPARTAN-II Program, an offshoot of the original SPARTAN operation. Using a conjunction of Quarian technology and leftover super-soldier materials from Dr. Abraham Erskine's work in WWII, Halsey and Xen's operations are successful, but due to lack of real test-subjects, they kidnap various children, most of them orphans, and subject them to heinous training and procedures to deem them viable candidates. Eventually, only five of the volunteers survive, and are designated as SPARTANS Linda-058, John-117, Emile-A239, and Catherine-B320. These new SPARTANS are equipped with a technologically-advanced combat exoskeleton system called MJOLNIR Powered Assault Armors, designed by both Daro'Xen and Howard Stark, the operation's financier.

S.H.I.E.L.D. Director Nick Fury gets wind of the operation, and has Dr. Catherine Halsey arrested for kidnapping and partaking in an illegal operation, and is imprisoned in the Fridge. Fury is unable to touch Daro'Xen or Stark, as the the former has deep connections in the Quarian government, while the latter is S.H.I.E.L.D.'s number one weapons contractor. As for the SPARTANS, Fury has them recruited into S.H.I.E.L.D. services, as they have nowhere else to go and they are valuable assets.

- December 16, 1991: Howard Stark and his wife Maria mysteriously die while vacationing on Mars, leaving their son, Tony, to inherit Stark Industries. Tony Stark then becomes the youngest CEO of a fortune 500 company, as well as a media celebrity. Tony gives the Earth governments knowledge of the Arc Reactor technology created by his father, which speeds up the governments' ship building operations.

- April 7, 1995: An archaeological team finds a series of mysterious ruins on Titan, Saturn's moon. The ruins appear to have been destroyed recently, and the archaeologists find evidence that whatever culture had been living there fled from the moon after it had been attacked by some unknown force.

- July 24, 1995: Natasha Romanoff is recruited by a shady Russian terrorist cell. She works with for three years, enduring both an education and indoctrination into the world of spycraft. Romanoff excels in this strict training environment and soon becomes regarded as a master spy and one of the world's greatest assassins. Her ruthless effectiveness earns her the codename, "Black Widow".

- January 31, 1998: Romanoff is instructed to assassinate Quarian leader Zaal'Korris, and just as she is about to intercept him, she decides against it, as killing Korris would break the peace between humanity and the Quarians. Nick Fury, who had been monitoring her activities, is impressed and gives her a chance to join S.H.I.E.L.D. Romanoff accepts. From Romanoff, S.H.I.E.L.D. discovers the Russian cell and shuts it down.

- January 1, 2000: Contact with the S.H.I.E.L.D. Satellite Outpost on Pluto is abruptly cut off. A few hours later, a colony on Triton is attacked by an insectoid race called the Gand.

- January 3, 2000: A team of elite S.H.I.E.L.D. agents including the four SPARTANS attempt to take back the moon, and discover the truth behind the Gand's hostility: the Gand had fled their own home system after it was attacked by a theocratic alliance of alien races called the Covenant, who had attempted to forcefully annex the Gand into their collective, and resorted to wiping out the entire species when they resisted. Using advanced stealth technology, the Gand were able to shake the Covenant off their trail. But upon entering the Sol System, the Gand's IFF technologies were momentarily unveiled upon intercepting the S.H.I.E.L.D. signal on Pluto, and destroyed it in order to shield themselves from the Covenant. Upon approaching Neptune, the Gand were met with similar risks after the colony on Triton picked up their approach and attempted to make contact with them.

After realizing that the humans and Quarians mean no ill towards them, the Gand apologize and surrender Triton and offer to help repair the colony. In return, humanity offers the Gand sanctum in the Sol System in case the Covenant attempts to hunt them down. With the Gand's faster-than-light travel, which the Gand called Hyperspace travel, the Humans and Quarians are given access to other star systems to colonize.

- February 5, 2001: After a year of living with the Gand, the human leaders realize that a change in the caste system needs to be made. The world governments, after much deliberation, put aside all of their differences and create the United Systems Alliance, made up of them, the Quarians, and the Gand. The construction of the Alliance is somewhat of a challenge to all three races, but they are able to divide on duties: the Gand maintain the responsibility of military leadership, sharing it with the humans, while the Quarians take up the roles of scientists and engineers. The Galactic Security Council is formed, made up of representatives from all three species, working as the Alliance's main governmental body. They are also given authority over S.H.I.E.L.D.

- September 11, 2001: A meeting between the human, Quarian, and Gand leaders is interrupted when the ship carrying the Gand ambassadors and hijacked by terrorists. The terrorists, bitter towards the Gand for their actions on Triton, attempt to launch a suicide attack against the World Trade Center, killing the Gand leaders. However, the Gand easily subdue the terrorists and regain control of the hijacked ship, saving thousands of lives in the process.

- August 20, 2003: The construction of the United Systems Alliance is completed. Earth, being the homeworld of humanity, the Alliance's founding race, is made the capitol of the Alliance. S.H.I.E.L.D. becomes an extragalactic peacekeeping service, working behind the various governments in order to maintain peace among the Alliance. With their newfound advancements in technology, the Quarians ask the Alliance leaders to retake Rannoch, but are met with some skepticism, as spies report that the Geth have advanced to unprecedented rates since the Quarians' departure.

- September 13, 2003: General Thaddeus Ross of the Alliance military is given permission to revive Dr. Halsey's SPARTAN Program. Assisted by Daro'Xen, Ross creates the SPARTAN-III Program, this time with both human and Quarian volunteers.

- March 4, 2005: Gand sniper Vaabesh is recruited into S.H.I.E.L.D., and is often paired with Black Widow in espionage and field operations. The two become close friends in their career together.

- January 12, 2006: While exploring an uncharted star system, Culver Academy graduate Bruce Banner and his girlfriend, Betty Ross (daughter of Thaddeus Ross), crash lands on a nearby ice world. Bruce is critically injured in the crash, but Betty manages to pull him out of the wreckage. The pair are discovered by the planet's natives, a race of large, blue-skinned humanoids. The beings take the pair prisoner and subject Banner to various tortures that alter his DNA. A distress call from the wrecked ship and intercepted by soldiers from the SPARTAN-III Program, who venture to the planet and rescue Banner and Ross from the natives.

Banner is taken to a medical facility where, after hours of treatment, they manage to save his life. However, they are unable to stop the bodily mutations, which transform Banner into some form of hybrid between a human and one of the natives of the ice world. In the aftermath of the incident, the ice world, dubbed BG-1201, is labeled as hazardous, with its natives being labeled as primitive savages unworthy of interacting with.

Meanwhile, Banner is taken in by S.H.I.E.L.D., who, while working to help reverse his mutation, help him unlock more secrets behind it. Banner soon discovers his mutation has given him the ability to create ice; aside from learning how to control his new abilities, Banner's brilliant mind make him a worthy addition of S.H.I.E.L.D.

- May 6, 2010: Tony Stark travels to the Quarian colony of Shanxi and gives a demonstration of the Plasma Wave Explosion (PWE) missile system. Afterward, the ship escorting Stark back to Earth is attacked by a group of Gand terrorists called the Zuckuss. Stark is wounded in the attack and captured. Fellow captive , Quarian engineer Veetor'Nara, saves his life by attaching an electromagnet to his chest. The Zuckuss order them to build a PWE missile system, but they instead build a battle suit powered by a miniature Arc Reactor.

- August 18, 2010: During their three months of capture, Tony Stark and Veetor finish the armored suit they have been creating. Stark uses it to escape, but Veetor is killed by the Zuckuss while saving him. Stark's suit gets him off of the planet, but doesn't last long before losing power and drifting through space. He is later found by the Alliance Military and taken to Earth, where he is checked out by doctors and subjected to debriefings from the S.H.I.E.L.D.

- August 20, 2010: Deeply affected by his experience, Tony Stark pulls Stark Industries out of the weapons business, terminating all military contracts, instead devoting his company's resources to fighting against terrorism and keeping peace between the three Alliance races. S.H.I.E.L.D. Agent Phil Coulson attempts to schedule a meeting through Stark's personal assistant Virginia "Pepper" Potts to discuss the circumstances of Stark's escape.

- September 12, 2010: Tony Stark continues to develop more refined versions of the armor he used to escape from the Zuckuss. These new suits possess various advanced forms of technology, such as faster-than-light travel. The first FTL test are not gently as Stark nearly dies from whiplash and experiences extreme motion sickness.

- September 24, 2010: Members of the Zuckuss discover remains from Tony Stark's original armor floating in orbit around Shanxi and sell it to Obadiah Stane, who starts to construct a larger, more advanced version.

- September 29, 2010: Tony Stark meets Tali'Zorah, the daughter of Quarian Admiral Rael'Zorah. A genius engineer, Tali is hired by Stark to be his assistant in working on the suits. Tali's assistance helps improve the various errors in the suits.

- October 22, 2010: The Zuckuss attack the colony of Harvest, and Tony Stark tests his Mark III armor by flying to Harvest and forcing the Zuckuss off of the planet.

- October 24, 2010: Stark's assistant, Pepper Potts, discovers that Obadiah Stane was responsible for surrendering Tony to the Zuckuss, hoping that Tony would die in captivity, allowing Stane to take control of Stark Industries.

She alerts S.H.I.E.L.D., who travel to Stane's secret facility on the moon where the armor is being constructed. Stane, in order to avoid capture, dons the armor and slaughters the S.H.I.E.L.D. team. Tony Stark arrives in his Mark III armor and duels Stane. During the battle, Stark plants a bug in Stane's armor, allowing Tali'Zorah to take control of it from Stark Industries on Earth. She directs the armor, with Stane still inside, to fly into the surface of Venus, killing him.

Shortly after the battle, Tony ignores a coverup story created by S.H.I.E.L.D. and confesses to the world he is the mysterious assailant, who is dubbed Iron Man by the press. Despite demands from the Alliance military to hand over his technology for the Iron Man suit, Stark refuses.

- January 10, 2011: Tony Stark continues to operate across the Alliance systems as Iron Man, bringing about a period of relative peace, thwarting any possible rebellions or terrorists attacks. His main target is the Zuckuss, who are causing various uprisings in the lesser systems, hoping to lead a rebellion against the Alliance leaders. Stark soon discovers that the palladium core of his Arc Reactor is slowly poisoning him. Tali'Zorah reverses the condition by replacing the palladium exponents with a miniature hyperdrive field generator used by the Gand. The transplant not only reverses the condition, but it also gives Stark better control over the FTL drives in his suits.

Tony is later approached by Nick Fury, who discusses the "Avengers Initiative".

- May 27, 2011: S.H.I.E.L.D. intern Jane Foster and her mentor, Dr. Erik Selvig, pick up a series of mysterious readings coming from New Mexico on Earth. Accompanied by Quarian S.H.I.E.L.D. intern Lia'Vael, the three are given approval by S.H.I.E.L.D. to go there and study the anomalies. Agent Vaabesh accompanies them for protection.

- May 31, 2011: In Asgard, Thor's coronation is suddenly interrupted when Odin senses a break-in in his treasure room. The culprits are discovered to be Frost Giants, and the Destroyer kills them. Thor is enraged at what he sees as an act of war. He, his brother Loki, and friends Sif and the Warriors Three travel to Jotunheim to seek justice for the actions of the Frost Giants. A fight breaks out between the Asgardians and the Frost Giants, but Odin arrives and rescues the Asgardians. Furious at his son for have provoking a war with the Frost Giants, Odin strips Thor of his power and sends him and his hammer, Mjolnir, to Earth. He crashes in New Mexico, where he is found by Jane Foster and her colleagues. Confused and ranting madly, Thor is tased by a firghtened Lia'Vael and taken to a local hospital.

- June 1, 2011: Thor attempts to escape from the hospital, but doesn't get far before being stunned by Vaabesh. He is kept quarantined in the local hospital, where doctors do DNA testing and discern that he is not human. Vaabesh sends this information to his S.H.I.E.L.D. superiors, who send in Agent Phil Coulson to interrogate Thor upon his revival.

Shortly after Coulson arrives, Mjolnir crashes in the nearby hillside, and S.H.I.E.L.D. sets up a perimeter to study it. Thor refuses to talk to Coulson, but Jane manages to sweet talk him into revealing his origins. The S.H.I.E.L.D. agents are confused by Thor's story, as it is similar to old folk tales from Norse mythology. However, with the evidence of Mjolnir, they realize he may be telling the truth, Thor, meanwhile, is shocked at humanity's developments since when the Asgardians last interacted with them, and is even more surprised at the presence of the Quarians and Gand.

Meanwhile, in Asgard, Loki, having discovered himself to be a Frost Giant, angrily confronts Odin. Stressed from Loki's anger and Thor's exile, Odin falls into the Odinsleep, leaving Loki to take the throne. He spies on Thor from Asgard, and is shocked and somewhat repulsed by Humanity's advanced status. Appearing to Thor, Loki lies to him by saying that Odin has died, and the Asgardians, blaming Thor, refuse to let him return to Asgard.

Jane Foster discovers that the event that brought Thor to Earth, and the event that they came to study, was actually an Einstein-Rosen Bridge, or a wormhole. Upon discovering that his hammer is being held in quarantine, Thor demands to see it. While skeptical, the agents agree to let Thor attempt to lift it, but to their disappointment and Thor's shame, it doesn't work. Resigned to his exile, Thor decides to remain on Earth, with S.H.I.E.L.D. interested in recruiting him for strategical value. He also becomes close friends with Jane Foster, Erik Selvig, Lia'Vael, and Vaabesh.

- June 2, 2011: Thor explains the Nine Realms to S.H.I.E.L.D.

Unhappy with Loki's rule, Sif and the Warriors Three go to Earth to find Thor. Moments after their arrival, they are ambushed by S.H.I.E.L.D. operatives and incapacitated using stun weaponry. They are then detained and questioned. Thor, recognizing them, is given permission to speak with them. Discovering Loki's lies, Thor prepares to return to Asgard to confront Loki. However, Loki has discovered their plans and sends the Destroyer to kill Thor. During the battle, the battle, Thor proves himself worthy of his godly heritage and his powers are restored, allowing him to defeat the Destroyer. He and his fellow Asgardians then return to Asgard to confront Loki, leaving S.H.I.E.L.D. behind.

Meanwhile, Loki has tricked the Frost Giant king, Laufey, into attempting to kill Odin, allowing Loki to kill him instead. Thor arrives, and a fight breaks out between him and Loki that leads to the destruction of the Bifrost Bridge. Odin, awakened from his sleep, saves the brothers from falling into the wormhole created by the bridge's destruction, but rejects Loki's pleas for acceptance. Disheartened, Loki allows himself to fall and is warped into deep space. With the Bifrost destroyed, the Asgardians are unable to return to Earth.

- June 18, 2011: In response to the events at New Mexico, the Galactic Security Council grants S.H.I.E.L.D. funds to create Operation KOSMOS, which involves utilizing the power of the Tesseract to enhance their weapons in case of hostile extraterrestrial encounter. The operation takes place at the Joint Dark Energy Mission Facility on Mars, and Dr. Erik Selvig is hired personally by Director Nick Fury to study the Tesseract.

- April 14, 2012: In the Arctic, a Quarian team discovers the crashed Valkyrie. Five hours later, S.H.I.E.L.D. agents are dispatched to the area, and exploring the wreckage, they find the body of Steve Rogers, who is still alive and cryogenically preserved in the ice.

- April 16, 2012: Steve Rogers' body is thawed out of the ice, and he is taken to the S.H.I.E.L.D. lunar facility. He wakes up and tries to run, but upon heading outside, he sees the Earth from the moon's surface and is shocked. He is approached by Nick Fury, who explains what has happened in his absence.

- April 27, 2012: Rogers is recruited into S.H.I.E.L.D., and becomes well acquainted with the Spartans, who look up to Steve as their predecessor and, metaphorically, the first Spartan.

- May 1, 2012: Present Day

Okay. That's the basic background info. Took me a while to type all of that. Basically, in this universe, Humanity, alongside the other two races, became an advanced interstellar superpower, and by the time the Asgardians arrives, they had advanced well beyond they did in the original MCU. And yes, this story is technically a multi-crossover.

Btw, for those of you who do not know, the Quarians are a race from the Mass Effect franchise, while the Gand are a race from Star Wars. One of my favorites, in fact.

And the Spartans are in this cuz... well, why the hell not?

Well, let me know if you think I should continue. Later!