Codex of an alternate history of the UNSC by 2897

Megaverse. A grand vision, on how Mass Effect, and others will be affected by a humanity forged from the influences of 1980's-2000's Sci-Fi and such. Prepare for BattleMech's, Powered Armour's, Fusion, Energy Weapons, Psychics, Magics, and more. How will the Citadel deal with a humanity that has seen and has Cyborgs, Super-Soldiers, BattleMech's, WarShips, with more to come?

Supreme Commander Thresk'Talamee is exploring an anomaly picked up by a probe, what he finds could change the course of the covenant and the war with Humanity. Admiral Jaehart Irilan is leading an exploration event to find colonies for the Salarian Union. Till he finds a probe from an unknown species, what will happen now? Rated T for violence and graphic depictions of death.

Fourth Generation Spartan Lucas Ryker is the Spartan without a team, preferring to shirk his fellow Spartans because they'd only "slow him down." However, when he's forced into cryo sleep during a mission to find the missing Master Chief due to extensive damage to the ship's life support, he'll wake up to a galaxy changed and realize working solo won't work this time.

Commander Shepard had failed. The Cycle continued, as planned. Now, the last cycle's failure will be the next cycle's trial, as the Great Journey draws ever near. Fighting against powers far beyond his own abilities, it is now up to Shipmaster Thel 'Vadamee to halt the return of the galaxy's most ancient foes, as dark powers work against everything he holds dear. (Halo AU)

After the end of the Human-Covenant War, humanity has been reduced to a VERY small number. That number being the Spartans that survived the aftermath. But even though everything is dead the Spartans still must protect whats left of humanity, by rebuilding from the ashes and repopulate. and rebuilding isn't the hard part...

Three galactic governments. One of them, a Council of Immortals who had faced the possible extinction of their species time and time again, another, a Republic which had unified from the shattering reality of war, the last, a Council which had stood for over a thousand years. When these three are threatened by an ancient power from beyond, will they be able to prevent the cycle?

36 years have passed since the end of the First Contact War after humanity achieved a costly victory against the Citadel Council. Now humanity struggles to maintain control of its status as the sole galactic superpower fighting off Resistance and Internal Struggle. Meanwhile Dark Forces are at work seeking to quicken humanity's downfall and plunge the galaxy into chaos.

The Galaxy is saved, but a threat from another universe threatens the destroy the newly found peace and union...

The war is lost. Humanity has fallen. As the Forerunner's genocidal campaign nears completion, at least one human manages to escape their wrath. Now, 100,000 years later, the last Titan once again finds herself on a journey to save humanity, uncover the past, and reclaim what was lost.

Due to unique circumstance, Spirit of Fire had to brace herself in a new galaxy... At another universe.

When Great War ended, humanity and covenant merged. New formed Republic of Orion Arm is trying to create a war-free civilization, but what will happen when this empire will meet another galactic goverment? Rated T for blood, death etc. Multiverse crossover (Cancelled)

After the defeat of the didact, the galactic hero of the halo universe - Masterchief and his loyal blue team members embark on a strange new journey to an unknown universe in which later they come into contact with that universe's hero - Commander Shepard. Facing an unknown enemy, fighting a new war, its up to the heroes to save the day together.

There are many things one can prepare for; genocidal, synthetic-AI hell-bent on the destruction of galactic civilisation? Shepard had already mapped out 10 contingencies for that probability. Being transported by a Reaper artifact into an entirely new universe? Well...it may hold no bearing here, but she's prepared to show this new universe how she got the title "Butcher of Torfan"

[I'm back! Maybe. I intend to update soon.] The Initiative embarked upon a journey of 2.3 million lightyears and 600 years. They awoke to a galaxy already full of living, sentient species. They will soon find, however, that they are not the first to journey between galaxies, and that they have followed the path of another's Great Journey. Halo and Mass Effect: Andromeda.

Thessia has fallen and is now shadowed under the banner of the UNSC Eagle. Humanity rules the Asari homeworld with an iron fist. There are many stories that can be told during this dark time. Here are a few from those who were there, accounts from both Human and Asari, Soldier and Civilian, Freedom fighter and Collaborator. (Side Story Prequel to A Dark Rising).

Massively AU. Halo/Mass Effect merged continuity. The galaxy, like much of the universe, is in a constant cycle of birth, destruction and rebirth. No guarantee our civilization is any different. We know others have come before us and perished at their height. What destroyed them? Could it destroy us as well? One human might be our savior, but he needs to grow up a bit first.

The UNSC colony of Avalon is under attack by Citadel forces just before a Covenant crusire arrives. AU set in the opening years of the Human-Covenant war. UP FOR ADOPTION.

just a codex I made that anyone can use, but to add things must be verified by me

The UNSC/Covenant war is over. The UNSC, Covenant, and Prometheans have joined to create the Republic of Sentient Species and are now an almost galaxy-wide power. Still, with the discovery of a device in space, and learning of a new enemy, will the RSS be able to react in time?

An X-Over of Mass Effect, Halo and Pokemon. This is actually an X-Over of two separate stories, Of The Future And Past by IAnswerToNoOne and the 'Omega' series, by OmegaEntertainment. The actual authors are the ones writing it. Please enjoy the insanity that we have written.

This is the sequel to Balaho Effect by Oledom, Unggoy Will Rain supreme and the Council WILL fall. But during all the battles, during all the death, an old evil awakens... its not the flood.

In the Year 2142, Unggoy explorers on Buwan discovered the remains of an ancient spacefaring civilization. They called it the greatest discovery in Unggoy history The civilizations of the galaxy call it. Mass Effect

Blue Team (Halo), Normandy (Mass Effect 1-3), Straw Hat Pirates (One Piece), Rias Gremory's Peerage (High School DxD), etc. characters from anime and games are transported to a new universe. A universe which is controlled by Kingdoms. When they arrive, each group was separated. What'll happen when all of these characters are out facing each other?

Alone and adrift in Andromeda, the crew of the Hyperion find themselves in the war fought between a ferocious theology and the UNSC, a human faction that is different and yet unnervingly similar to the Systems Alliance. ABANDONED due to not so great canon material.