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The Spartan Effect
by Gatekeeper333 reviews
Everyone's favorite Spartan is looking for a new purpose, lucky for him, the Commander his happy to oblige.
Crossover - Halo & Mass Effect - Rated: T - English - Chapters: 37 - Words: 378,961 - Reviews: 1326 - Favs: 1,945 - Follows: 2,439 - Updated: 4/30 - Published: 3/27/2011 - Master Chief/John-117, Tali'Zorah, Miranda L., Shepard (M)
The Infinity Effect
by creamofwheat2311 reviews
After discovering a Precursor artifact, the UNSC Infinity and the Sangheili Shadow of Intent are transported to a universe unlike anything they have ever seen, and forced into a war against a foe they never could have imagined: the Reapers. Alliances are founded, friendships are formed, and decisions are made that will change both galaxies forever.
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 36 - Words: 324,740 - Reviews: 2758 - Favs: 3,287 - Follows: 3,962 - Updated: 4/16 - Published: 10/9/2013 - Master Chief/John-117, T. Lasky, Admiral Hackett, Shepard (M)
by Avatar Stark reviews
Written for the Terra Firma Scapers "StarBurst Challenge no. 100". When Scorpius nabs Crichton and Aeryn and brings them through a wormhole to Earth, they don't find the weak and defenseless planet they were expecting. The US Air Force has been busy; and there are family reunions in store for more than just John Crichton.
Crossover - Stargate: SG-1 & Farscape - Rated: T - English - Adventure - Chapters: 5 - Words: 28,956 - Reviews: 7 - Favs: 17 - Follows: 18 - Published: 3/21 - [J. Crichton, Aeryn S.] C. Mitchell, Vala - Complete
Apostle's Message Redux
by Lone-ranger1 reviews
When the Reapers see the threat Shepard poses, they enact a backup plan millions of years old. A single Reaper will unleash his fury and two galaxies will never be the same. (New Chapter 13/12/16)
Crossover - Stargate: SG-1 & Mass Effect - Rated: T - English - Adventure/Sci-Fi - Chapters: 37 - Words: 419,943 - Reviews: 359 - Favs: 359 - Follows: 461 - Updated: 1/7 - Published: 8/18/2011 - S. Carter, Shepard (M)
The Thorny Twisted Road Never Travelled
by Morena Evensong reviews
The Ark revealed the truth to the Priors, but not all of them were interested in merely serving the Ori. Some only wanted power. Four years after the end of the Second Blood War, Death Eaters are still a threat. However, as Kingsley begins to discover, there is an even greater threat to the Wizarding World, kept secret as the world's biggest conspiracy - not counting the aliens.
Crossover - Stargate: SG-1 & Harry Potter - Rated: T - English - Sci-Fi/Drama - Chapters: 8 - Words: 60,909 - Reviews: 84 - Favs: 140 - Follows: 209 - Updated: 11/16/2017 - Published: 10/13/2016
WSG 1: Book II: Above and Beyond
by Kelso323 reviews
As the survivors of the Twelve Colonies confront the new and deadly realities of the universe around them, old sins and secrets will arise from the ashes of a forgotten past to once again threaten the survival of the human race.
Crossover - Space: Above and Beyond & Battlestar Galactica: 2003 - Rated: M - English - Sci-Fi/Adventure - Chapters: 17 - Words: 342,421 - Reviews: 175 - Favs: 142 - Follows: 138 - Updated: 9/17/2017 - Published: 3/28/2012
Halo: New Horizons
by creamofwheat2311 reviews
In 2559, and the UNSC has discovered a large anomaly on the edge of the galactic rim. What it turns out to be has the potential to change history, but maybe not in the way the UNSC intended. Meanwhile, with the first Death Star destroyed, the Rebel Alliance is desperately trying to overthrow the Empire, but it will take the help of new allies to liberate the galaxy. Discontinued.
Crossover - Star Wars & Halo - Rated: T - English - Sci-Fi/Adventure - Chapters: 23 - Words: 155,262 - Reviews: 930 - Favs: 993 - Follows: 1,044 - Updated: 9/30/2016 - Published: 11/1/2012 - Luke S., G. Marek/Starkiller, T. Lasky - Complete
The Search for Victory
by Morena Evensong reviews
During the hunt for Hydra, SGC operations are stalled. But the Ori's armies are still coming and Earth isn't any closer to coming up with anything that can stop them. Frustrated, Daniel takes a vacation and accidentally uncovers a clue to what could be an Ancient weapon. Against protocol, against orders, he and his friends set out on a desperate quest to find a way to save Earth.
Crossover - Stargate: SG-1 & Avengers - Rated: K+ - English - Sci-Fi/Adventure - Chapters: 38 - Words: 283,425 - Reviews: 512 - Favs: 451 - Follows: 476 - Updated: 9/23/2016 - Published: 10/6/2014 - D. Jackson, Black Widow/Natasha R., Captain America/Steve R., Hawkeye/Clint B. - Complete
The Fighting Spirit
by smart grid reviews
Spartans never die, they say. When Jorge gave his life to save his home planet of Reach, he never imagined that he would survive. But now he finds himself neck deep in the troubles of another universe; he will do what he has been trained to do, what all Spartans do best: fight.
Crossover - Halo & Mass Effect - Rated: T - English - Adventure - Chapters: 39 - Words: 176,016 - Reviews: 732 - Favs: 1,099 - Follows: 1,167 - Updated: 1/16/2016 - Published: 12/1/2011 - Jorge-052/Noble Five, Shepard (F) - Complete
There and Back Again
by Independence-Day reviews
Reposted: Trapped in a world that isn't theirs and fighting in a war they have no place in, Harry, Ron, Hermione and Draco must find a way to get back home before everything they love is destroyed.
Crossover - Harry Potter & Lord of the Rings - Rated: T - English - Adventure - Chapters: 15 - Words: 44,862 - Reviews: 130 - Favs: 190 - Follows: 279 - Updated: 1/3/2016 - Published: 11/23/2011
Into the Void
by Kenneth Whit3 reviews
When the Long Night of Solace was destroyed by the most advanced piece of equipment ever jury-rigged by man, it took one of the last Spartan-II's with it. On the other side of that void, Jorge-052 found an unfamiliar universe and a terrifying new enemy, but Commander Shepard found a powerful ally and a new hope for humanity.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 19 - Words: 63,444 - Reviews: 161 - Favs: 344 - Follows: 478 - Updated: 8/19/2015 - Published: 2/19/2014 - Jorge-052/Noble Five, Illusive Man, Harbinger, Shepard (M)
Miles Militis Candidus
by Randall Flagg reviews
Buffy the Vampire Slayer crossover with Harry Potter. Set after the final episode of Buffy and aligned with post-Hogwarts Harry Potter. After leading the battered survivors out of Sunnydale, Xander comes to a decision that will have far-reaching consequences - and will impact both the muggle and magical world.
Crossover - Buffy: The Vampire Slayer & Harry Potter - Rated: M - English - Adventure - Chapters: 13 - Words: 23,421 - Reviews: 19 - Favs: 96 - Follows: 150 - Updated: 4/13/2014 - Published: 4/11/2004 - Xander H.
by Separatist Supporter reviews
The SPARTANs trapped in Onyx have escaped, only to find themselves in one of the last situations they expected. Post Ghosts of Onyx, during the Corellian Trilogy of SW EU. Content added to Prologue and Chapter 1. Chapter 6 complete (for now).
Crossover - Star Wars & Halo - Rated: T - English - Sci-Fi/Adventure - Chapters: 7 - Words: 18,323 - Reviews: 59 - Favs: 54 - Follows: 91 - Updated: 8/9/2013 - Published: 4/18/2011 - Leia O., Han S., F. Mendez, Tom-B292
From Savior to Avenger
by ImpromptuApathy reviews
Harry Potter came out of the War victorious against Voldemort, only to be thrust into another war, one far beyond the realms of man. As he faces uncertainty without his old allies by his side, Harry learns to fight alongside new ones and show that the boy-who-lived is more than a savior, and the Chosen One is more than a legend, but that Harry Potter is an Avenger.
Crossover - Harry Potter & Avengers - Rated: T - English - Adventure - Chapters: 8 - Words: 38,384 - Reviews: 817 - Favs: 3,433 - Follows: 4,851 - Updated: 7/19/2013 - Published: 5/29/2012 - Harry P.
Always in motion, is the future
by Connor846 reviews
Nick Fury receives a report about something that occurred during the Battle of New york that will change Earth and the Avengers ... opening up whole new worlds of possibility for all of them.
Crossover - Star Wars & Avengers - Rated: T - English - Adventure - Chapters: 4 - Words: 8,535 - Reviews: 49 - Favs: 55 - Follows: 112 - Updated: 11/14/2012 - Published: 6/26/2012 - Luke S., Nick F.
by Peptuck reviews
As Tiberium spreads across the Earth, the Global Defense Initiative finds itself facing a reforged and vengeful Brotherhood of Nod, and an even more mysterious, inhuman force that holds the secrets to the green crystal... A novelization of Tiberium Wars.
Command & Conquer - Rated: M - English - Sci-Fi/Drama - Chapters: 24 - Words: 206,445 - Reviews: 508 - Favs: 712 - Follows: 557 - Updated: 4/19/2012 - Published: 7/13/2007 - GDI Commander, Kane
Wizard Behind the Wheel
by willyolioleo reviews
Who knew that getting a driver's license could be such a hassle? Epilogue fic.
Harry Potter - Rated: T - English - Drama - Chapters: 1 - Words: 4,975 - Reviews: 90 - Favs: 229 - Follows: 142 - Published: 8/29/2011 - Harry P., Ron W.
Ghost within the Avatar
by donalgraeme reviews
What if Jake had his legs when he came to Pandora? What if he had been a member of a top-secret black ops team before his arrival. How will a trained killer afraid of himself survive the Na'vi? This is the story of Jake Sully
Avatar - Rated: T - English - Adventure - Chapters: 2 - Words: 13,660 - Reviews: 85 - Favs: 172 - Follows: 192 - Updated: 1/9/2010 - Published: 1/5/2010 - Jake S.
March to Victory
by Trinial reviews
The war is over, but the Spartans don't know that. Desperate to find a way back into the fight, they inadvertantly stumble across ancient devices, and an alliance so old that no one remembered it ever existed.
Crossover - Halo & Stargate: Atlantis - Rated: T - English - Sci-Fi - Chapters: 4 - Words: 30,430 - Reviews: 147 - Favs: 279 - Follows: 353 - Updated: 7/8/2009 - Published: 5/1/2008
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.
Crossover - Halo & Battlestar Galactica: 2003 - Rated: T - English - Sci-Fi/Adventure - Chapters: 10 - Words: 25,046 - Reviews: 97 - Favs: 187 - Follows: 246 - Updated: 12/4/2007 - Published: 4/30/2007 - Master Chief/John-117, L. Adama/Apollo
by imjustaguy reviews
After over two millennia of separation humanity reunites among stars.
Battlestar Galactica: 2003 - Rated: T - English - Adventure/Drama - Chapters: 25 - Words: 58,213 - Reviews: 503 - Favs: 448 - Follows: 388 - Updated: 11/26/2007 - Published: 11/28/2004
Derelict: A Stargate nBSG crossover
by Crazy-88 reviews
Waiting for eons in an unclaimed Star System of the Milky Way Galaxy, one of the last great inventions of the Ancients will show the way home for one people and bring two Galaxies into an all out war…
TV X-overs - Rated: T - English - Sci-Fi/Adventure - Chapters: 10 - Words: 106,024 - Reviews: 216 - Favs: 447 - Follows: 474 - Updated: 6/18/2007 - Published: 11/2/2005
Birds of a Feather
by Alec Star reviews
A Stargate The Sentinel crossover. A letter brings forth an unexpected revelation.
Crossover - Sentinel & Stargate: SG-1 - Rated: T - English - Chapters: 43 - Words: 55,588 - Reviews: 136 - Favs: 89 - Follows: 39 - Updated: 2/7/2006 - Published: 3/28/2005 - Complete
When it rains it pours
by sharpe26 reviews
the Saratoga finds the (new) Battlestar Galactica. Just when Earth thought things couldn't get worse, the did.
my apologies about the poor formatting, I'll try to update this from part 12 to a better format.
TV X-overs - Rated: T - English - Sci-Fi/Adventure - Chapters: 2 - Words: 28,712 - Reviews: 13 - Favs: 22 - Follows: 20 - Updated: 6/2/2005 - Published: 5/8/2005
Farscape-Babylon Book Two: "Flying Colors"
by Ian K reviews
Second story in Farscape-Babylon Crossover series. A young Earth Force Captain is sent with ship and crew to the Sebacean Royal Colonies to seek help in curing the Drakh plague before it wipes out all life on Earth.
TV X-overs - Rated: T - English - Chapters: 1 - Words: 45,222 - Reviews: 6 - Favs: 20 - Follows: 8 - Published: 3/4/2002
Sort: Category . Published . Updated . Title . Words . Chapters . Reviews . Status .
The Burden of a Miracle reviews
An Ex-Soldier down on his luck finds a new lease on life when he finds himself caught in the middle of a looming clash between two mortal foes. Burdened with his unique insights he must balance his actions with the safety of his family who also reside in this new life. Will he use this knowledge to make changes and risk his family, Or perhaps let things unfold as they should?
Crossover - Flash & Arrow - Rated: M - English - Adventure/Drama - Chapters: 1 - Words: 3,427 - Reviews: 2 - Favs: 9 - Follows: 10 - Published: 10/20/2015
The Chosen Ones reviews
A new breed of warrior will be reborn from the legends of old, as a man with the weight of worlds on his shoulder battles for redemption and another will begin his journey. Once again Sunnydale will become the epicenter of Good against Evil.
Buffy X-overs - Rated: K - English - Adventure/Drama - Chapters: 15 - Words: 177,968 - Reviews: 80 - Favs: 115 - Follows: 126 - Updated: 10/16/2013 - Published: 3/3/2009
Homeword Bound Book II: Brothers and Sisters reviews
One year has passed since the Colonials made it to Earth leading many to question what really happened thousands of years ago. But a quest to find the truth may not bring the answers anyone hoped for. Meanwhile humanities enemies are on the move.
TV X-overs - Rated: T - English - Drama/Adventure - Chapters: 2 - Words: 4,126 - Reviews: 34 - Favs: 72 - Follows: 77 - Updated: 6/26/2008 - Published: 4/8/2008
Chronicles of the Crusade Book 2: The Long Road reviews
Draal and Atlantis point the way to P3X 7171 a world that may hold the key to beating the Drahk plague. SG1 is reformed with the task of finding it setting off a chain of events that will lead both Earths down the long painful road to deliverance.
TV X-overs - Rated: K - English - Adventure - Chapters: 11 - Words: 107,028 - Reviews: 107 - Favs: 175 - Follows: 189 - Updated: 5/10/2008 - Published: 9/5/2006
Convergent Paths reviews
Ba'al has stolen a valuable peice of technology from the Tollan which could tip the balance of power in his favor. In a desperate bid to stop him the Tollan turn to the only people who can beat him leading SG1 on an adventure into another universe.
TV X-overs - Rated: K+ - English - Adventure - Chapters: 5 - Words: 40,049 - Reviews: 57 - Favs: 59 - Follows: 78 - Updated: 3/1/2008 - Published: 3/18/2007
Homeworld Bound A SAAB NBSG crossover story Book 1 reviews
After 2yrs of running from the Cylons the Colonials are on the brink. Low on Food, Fuel and Morale they must play one last game of Cat and Mouse against the Cylons. Meanwhile Earth comes face to face against an enemy far more powerful than the Chigs.
TV X-overs - Rated: K - English - Sci-Fi/Adventure - Chapters: 14 - Words: 125,559 - Reviews: 117 - Favs: 170 - Follows: 101 - Updated: 3/17/2007 - Published: 4/15/2005 - Complete
Chronicles of the Crusade Book 1: The Gateway reviews
The Earth Alliance has been attacked by the Drahk leaving Earth Quarantined with the Plague. As the ISA searches the Galaxy looking for a cure help comes from a most ulikely source. Stargate Command.
TV X-overs - Rated: T - English - Adventure/Drama - Chapters: 21 - Words: 128,936 - Reviews: 222 - Favs: 247 - Follows: 131 - Updated: 8/23/2006 - Published: 10/4/2005 - Complete