Halo and Battlestar Galactica: 2003 Crossovers
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Battlestar UNSC by StarDude117 reviews
Reach is under attack when the orders come down the line for all UNSC assets to rally at Reach in defense for the last bastion before Earth Task force Midway's Survivors answer the call however unknown to them in a different dimension the Twelve colonies of Kobol are under attack and they are losing see how the sudden appearance of a small UNSC task force changes things better
Rated: T - English - Sci-Fi/Adventure - Chapters: 49 - Words: 70,909 - Reviews: 168 - Favs: 120 - Follows: 184 - Updated: 3/14 - Published: 10/18/2024 - OC, W. Adama, S. Tigh, Gaeta
Always Be a Good Boy by Anquietas reviews
A Spartan and his A.I. companion will stumble across the Colonies of Kobol just a few days before the Cylon attack. That is where our story will truly begin.
Rated: T - English - Sci-Fi/Adventure - Chapters: 12 - Words: 78,309 - Reviews: 102 - Favs: 173 - Follows: 270 - Updated: 4/21/2024 - Published: 12/26/2023 - OC, W. Adama, L. Adama/Apollo, K. Thrace/Starbuck
Halo - So Say We All by SpaceCowboy2013 reviews
It started with the Pillar of Autumn initiating contact between lost branches of humanity. And ended with branches of humanity fighting together on a dying Battlestar. Will the Colonies survive a threat that puts the Cylons to shame? Can two cultures avoid fighting each other and unite to survive a war greater than any struggle humanity has ever faced?
Rated: T - English - Sci-Fi/Suspense - Chapters: 1 - Words: 15,360 - Reviews: 24 - Favs: 71 - Follows: 96 - Published: 4/11/2024 - Master Chief/John-117, J. Keyes, L. Adama/Apollo, K. Thrace/Starbuck
The Leviathan and The Relic by Ludum reviews
The fleeing refugees of the 12 Colonies encounter the UNSC Infinity. It seems that their problems are over as the UNSC can easily steamroll the Cylons with just this one ship. But what if the Cylons knew of a weapon that can wipe out all humanity more efficiently than nuclear bombardment of 12 planets?
Rated: T - English - Chapters: 2 - Words: 11,636 - Reviews: 134 - Favs: 320 - Follows: 486 - Updated: 12/31/2019 - Published: 6/23/2019
UNSC & Colonial -Covenant War by GeneralJames 717 reviews
Earth and her colonies have been fighting for survival for 7 years. During one battle a Battle Group escaped from the Covenant, they came across another group of long lost humans called the 12 Colonies of Kobol. The age of peace was broken for the Colonials when the Covenant attacked. Can both groups of humanity fight together or be destroyed one at a time.
Rated: T - English - Sci-Fi/Adventure - Chapters: 5 - Words: 27,688 - Reviews: 36 - Favs: 69 - Follows: 83 - Updated: 12/22/2018 - Published: 5/26/2017
Collision Course by Krionik reviews
When a Viper Scout from the Galactica is transported across the galaxy, what will happen? (Cancelled)
Rated: T - English - Sci-Fi/Adventure - Chapters: 6 - Words: 3,714 - Reviews: 30 - Favs: 58 - Follows: 70 - Updated: 5/9/2018 - Published: 6/9/2015 - J. Keyes, L. Adama/Apollo, K. Thrace/Starbuck, Gaeta
Battlestar Galactica: The Guiding Fire by GunnyStacker reviews
199 days after the Cylon attack on the 12 Colonies, a chance encounter brings the Colonial Fleet in contact with the UNSC Spirit of Fire after the events of the Forerunner Shield World. Can they work together to reach UNSC space before the Cylons wipe them all out and manage to overcome the odds without killing each other first?
Rated: T - English - Sci-Fi/Drama - Chapters: 13 - Words: 157,922 - Reviews: 610 - Favs: 1,188 - Follows: 1,470 - Updated: 2/2/2018 - Published: 11/13/2016 - J. Cutter, Serina, W. Adama, K. Thrace/Starbuck
HALO: Colonial Contact by Seawolf321 reviews
UNSC Ships are fleeing from Reach, being hotly pursed by Covenant Forces. They make a jump into Slipstream Space and wind up stumbling across the Twelve Colonies of Kobol. Shortly after First Contact with the Twelve Colonies of Kobol, the Covenant attack, can the combined forces of the UNSC and the Colonial Navy Stop them?
Rated: T - English - Sci-Fi/Adventure - Chapters: 1 - Words: 6,802 - Reviews: 24 - Favs: 93 - Follows: 130 - Published: 10/28/2016 - O'Brien, OC, W. Adama, L. Adama/Apollo
The first journey by Liam-da-wolf reviews
In the year 2031, the first interstellar fleet leaves the moon and is never seen again. The cause: an undetected error in the jump drives. Now without a planet to call home, the fleet is thrown into two separate wars, with the fate of both lying on their shoulders.
Rated: T - English - Adventure/Sci-Fi - Chapters: 2 - Words: 1,438 - Reviews: 11 - Favs: 14 - Follows: 17 - Updated: 12/21/2014 - Published: 12/10/2014
Amaranth by Aurora Halsey reviews
"Amaranth ... did not soon fade and so symbolized immortality" A Spartan, plucked from death, kept frozen in time, the propaganda rings true, Spartans never die. Could this soldier be the answer to a wandering fleet's problem. One more world to save, can this Spartan lead these lost souls home?
Rated: T - English - Sci-Fi/Adventure - Chapters: 5 - Words: 12,426 - Reviews: 49 - Favs: 90 - Follows: 148 - Updated: 10/11/2014 - Published: 6/1/2013 - W. Adama
A Life More Ordinary by JA Baker reviews
Sequel to Red In Tooth And Claw: Twenty years ago, two of humanities greatest heroes (and one of their smartest scientists) gave their lives to save the galaxy. Or at least, that's what everyone was supposed to believe...
Rated: T - English - Sci-Fi/Drama - Chapters: 6 - Words: 13,474 - Reviews: 93 - Favs: 279 - Follows: 255 - Updated: 1/15/2014 - Published: 2/22/2013 - [Master Chief/John-117, Cortana] C. Halsey - Complete
Transition by Blad3Zer0 reviews
Never had the Cylons truly been challenged after the first rebellion. Yet when they discover a ship from the Thirteenth Tribe, they unwittingly step in the midst of a galactic war, with only a single, unlikely human to guide them safely through this Great Journey.
Rated: T - English - Adventure/Mystery - Chapters: 10 - Words: 43,518 - Reviews: 115 - Favs: 186 - Follows: 275 - Updated: 12/20/2013 - Published: 6/26/2008 - OC, Number Six, D'Anna B., S. Valerii/Boomer
Halo Colonial Horizon by SpaceCowboy2013 reviews
A UNSC Cruiser escaping a deadly battle with the Covenant Onslaught and performing the Cole Protocol jumps into the middle of the Cyrannus Sector. But will the Covenant onslaught destroy the Colonials and the UNSC before they destroy each other? (CANCELLED, FOCUSING ON HALO THE IMPERIAL WAR)
Rated: T - English - Sci-Fi - Chapters: 13 - Words: 93,820 - Reviews: 458 - Favs: 541 - Follows: 523 - Updated: 2/21/2013 - Published: 6/24/2011 - Kurt-051, W. Adama
Into the Wild by zero0hero reviews
A lone UNSC frigate finds itself far from home and holding the keys to ending the Covenant war. If only they can survive insane aliens, a race rampant AIs, and a cutoff branch of their own species.
Rated: T - English - Chapters: 7 - Words: 63,650 - Reviews: 68 - Favs: 197 - Follows: 239 - Updated: 9/16/2012 - Published: 9/13/2010
The Homecoming Saga by DigitalEccentric reviews
The Human/Covenant War is over, but when two worlds collide a new fight begins. A fight for survival, a fight for acceptance, a fight for truth, and one soldier's fight to lead a lost generation back home. AU HaloxBattlestar Galactica. T rating. Unfinished.
Rated: T - English - Sci-Fi/Adventure - Chapters: 11 - Words: 25,934 - Reviews: 139 - Favs: 183 - Follows: 200 - Updated: 5/1/2012 - Published: 11/2/2007 - Master Chief/John-117, Cortana, W. Adama - Complete
Survival of the Lambs by Axemen236 reviews
Battered and beaten, a group of civilian ships protected by eight battlestars struggle to make their way to a "fortress world" rumored to harbor survivors. Before they can find this world, they are thrust into a war never before seen by colonial eyes.
Rated: T - English - Sci-Fi/Adventure - Chapters: 7 - Words: 16,134 - Reviews: 53 - Favs: 45 - Follows: 57 - Updated: 8/30/2011 - Published: 8/8/2011
Red In Tooth And Claw by JA Baker reviews
When the crew of Galactica encounters the remains of the Forward Unto Dawn, life starts to get a lot more complicated for all involved, including an old enemy...
Rated: T - English - Sci-Fi/Adventure - Chapters: 60 - Words: 139,295 - Reviews: 1619 - Favs: 1,462 - Follows: 1,097 - Updated: 3/13/2011 - Published: 2/12/2008 - [Master Chief/John-117, Cortana] - Complete
Halo: Cylon War by Redrover117 reviews
This is Spartan 117...I am alive...I have defied gods and demons. I am humanity's shield and its sword. The world has ended and the fight for humanity's survival has begun again.
Rated: T - English - Sci-Fi/Adventure - Chapters: 19 - Words: 48,049 - Reviews: 222 - Favs: 441 - Follows: 285 - Updated: 12/16/2010 - Published: 7/31/2010 - Master Chief/John-117 - Complete
Return of the Reclaimer by wilkins75 reviews
Two years ago an Alien Ship was found and moved to a secret military base. On board was a person of unknown origins in armor frozen in time. Cylons are now preparing for their attack on the 12 Colonies of Man unaware of what is nearby watching.
Rated: T - English - Sci-Fi/Adventure - Chapters: 25 - Words: 63,448 - Reviews: 355 - Favs: 623 - Follows: 361 - Updated: 8/30/2010 - Published: 5/19/2010 - Master Chief/John-117 - Complete
Time to Go by CreepyReaper reviews
The UNSC is facing a war on its doorstep with an unknown enemy.
Rated: T - English - Sci-Fi - Chapters: 13 - Words: 23,430 - Reviews: 94 - Favs: 65 - Follows: 93 - Updated: 3/13/2010 - Published: 9/21/2009
the last of Autumn by randomjaffa6 reviews
first chapter up, please reveiw. is about one halo marine and three technicians.
Rated: T - English - Chapters: 1 - Words: 478 - Reviews: 12 - Favs: 3 - Follows: 7 - Published: 11/5/2009
Contact Harvest: The Cylon War by Vile Twitch reviews
When the Cylons fled the Twelve Colonies of Kobol what if they came across the UNSC in the year 2525 Halo/HaloWars/BSG2003
Rated: T - English - Sci-Fi/Adventure - Chapters: 3 - Words: 4,467 - Reviews: 48 - Favs: 92 - Follows: 127 - Updated: 4/17/2009 - Published: 4/15/2009
With the help of a Spartan by GreenKnightXXVI reviews
BSGHALO crossover. When the colonials mount their defense of the Algae planet, defeat is averted when a powerful, mysterious warrior comes to the aid of the beleagured colonial troops. The colonials find new allies, new enemies, and a clear road to Earth.
Rated: T - English - Sci-Fi/Adventure - Chapters: 10 - Words: 25,046 - Reviews: 100 - Favs: 218 - Follows: 282 - Updated: 12/4/2007 - Published: 4/30/2007 - Master Chief/John-117, L. Adama/Apollo