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Visited by a Doctor
by Tangerine-Alert reviews
At a young age Harry met someone called the Doctor, he became his friend. Over the course of his school life the Doctor returned, in each of his incarnations. Leaving Hogwarts Harry continues to have adventures, visited upon by the Doctor's influences.
Crossover - Doctor Who & Harry Potter - Rated: T - English - Drama/Sci-Fi - Chapters: 89 - Words: 717,635 - Reviews: 1235 - Favs: 1,920 - Follows: 1,853 - Updated: 8/8 - Published: 3/14/2009 - Harry P.
Mass Effect: Human Revolution
by IgnusDei reviews
Adam Jensen finds himself in a time only dreamed of in vids, humanity is now part of a great galactic community that fears synthetics, and he struggles to find his place within it. Note: Primarily a DX/ME crossover, with elements borrowed and integrated from other Square Enix franchises.
Crossover - Deus Ex & Mass Effect - Rated: M - English - Sci-Fi/Supernatural - Chapters: 73 - Words: 776,107 - Reviews: 2086 - Favs: 2,104 - Follows: 2,166 - Updated: 6/27 - Published: 3/12/2012
Back Again, Harry?
by Jedi Buttercup reviews
WIP. Harry makes a different choice in King's Cross and is given the double edged gift of a second chance. Time Travel AU, DH canon.
Harry Potter - Rated: T - English - Drama - Chapters: 20 - Words: 74,412 - Reviews: 3486 - Favs: 7,217 - Follows: 9,733 - Updated: 1/12 - Published: 7/31/2007 - Harry P., Ron W., Hermione G.
Harry's New Home
by kbinnz reviews
One lonely little boy. One snarky, grumpy git. When the safety of one was entrusted to the other, everyone knew this was not going to turn out well... Or was it? AU, sequel to "Harry's First Detention". OVER FIVE MILLION HITS!
Harry Potter - Rated: T - English - Chapters: 64 - Words: 318,389 - Reviews: 11403 - Favs: 7,886 - Follows: 2,848 - Updated: 5/9/2016 - Published: 7/31/2008 - Harry P., Severus S. - Complete
by Solaris242 reviews
Humanity never developed FTL. The Prothean archives contained no technology, no Element Zero, just a warning. Isolated from the rest of the galaxy for two thousand years, restricted to their only system, how will humanity have changed when they first meet the Turians? AU, alternate history of humanity and First Contact.
Mass Effect - Rated: T - English - Sci-Fi - Chapters: 18 - Words: 40,604 - Reviews: 1952 - Favs: 5,623 - Follows: 6,596 - Updated: 3/1/2016 - Published: 5/7/2013
An Aunt's Love
by Emma Lipardi reviews
Harry comes home from school and Petunia is upset at the change in her nephew. Petunia decides to do what she should have been doing all along. Dumbledore had better stay away. Petunia Dursley is upset. Warnings on profile.
Harry Potter - Rated: M - English - Drama - Chapters: 73 - Words: 362,981 - Reviews: 15024 - Favs: 11,324 - Follows: 10,957 - Updated: 12/31/2015 - Published: 12/30/2004 - Harry P.
Kin From The Stars: Incursion
by Kinsmen From A Far Star reviews
Fifteen years after the Covenant War, ONI discovers the Systems Alliance; decimated by the Reapers six years ago. Faced with insurgency among the Colonies, ONI realizes it must make sure the truth never sees the light of day and begins a radical new plan, in a desperate attempt to buy the UNSC as much time as possible, and for that, it will need a new generation of Spartans...
Crossover - Halo & Mass Effect - Rated: T - English - Adventure/Sci-Fi - Chapters: 15 - Words: 109,115 - Reviews: 262 - Favs: 289 - Follows: 328 - Updated: 6/28/2014 - Published: 9/25/2012 - C. Halsey, Kelly-087, Garrus V., Shepard (M)
Prince of the Dark Kingdom
by Mizuni-sama reviews
Ten years ago, Voldemort created his kingdom. Now a confused young wizard stumbles into it, and carves out a destiny. AU. Nondark Harry. MentorVoldemort. VII Ch.8 In which someone is dead, wounded, or kidnapped in every scene.
Harry Potter - Rated: M - English - Drama/Adventure - Chapters: 147 - Words: 1,253,480 - Reviews: 11000 - Favs: 6,930 - Follows: 6,231 - Updated: 6/17/2014 - Published: 9/3/2007 - Harry P., Voldemort
by James Golen reviews
Three Families seek the Avatar. Three Families find the Avatar. Three Families use the Avatar. The story of how three sets of siblings are changed by the Avatar, amidst an endless war. AU, Want of A Nail.
Avatar: Last Airbender - Rated: T - English - Adventure/Supernatural - Chapters: 61 - Words: 1,236,700 - Reviews: 386 - Favs: 272 - Follows: 191 - Updated: 12/5/2013 - Published: 7/19/2011 - Aang, Azula - Complete
Victory at Ostagar
by Arsinoe de Blassenville reviews
When Bryce Cousland's little spitfire scaled the Tower of Ishal and lit the beacon at the critical moment, King Cailan won a mighty victory against the darkspawn. The Blight, however was far from over. All other origins included, plus Hawke and his companions. Cousland/Loghain, Morrigan/Anders, Surana/Zevran, Fergus/Anora, and more. Half a million hits and still going.
Dragon Age - Rated: T - English - Adventure/Fantasy - Chapters: 128 - Words: 1,173,512 - Reviews: 5202 - Favs: 1,397 - Follows: 906 - Updated: 11/30/2013 - Published: 3/18/2010 - Cousland - Complete
by Niger Aquila reviews
In one world, the war against Lord Voldemort is raging. In another, a Hogwarts professor named Tom Riddle decides to put his theory on alternate worlds to test and embarks on a trip that quickly turns into a disaster. AU sixth year. DH compliant.
Harry Potter - Rated: T - English - Drama - Chapters: 26 - Words: 76,878 - Reviews: 887 - Favs: 1,700 - Follows: 2,053 - Updated: 1/26/2013 - Published: 9/27/2005 - Tom R. Jr., Albus D., Voldemort
by katfairy reviews
When Terry runs into more trouble than he can handle, his friends and family must help him pick up the pieces and recover. I said I wouldn't give up on this, and I meant it.
Batman Beyond - Rated: T - English - Drama - Chapters: 30 - Words: 80,643 - Reviews: 529 - Favs: 377 - Follows: 285 - Updated: 6/18/2012 - Published: 9/11/2003
Clash of Federations
by RenS reviews
An incident in the Earth-Minbari War accidently creates a way into the Star Trek universe, which is at war in itself. Each universe now has to deal with a war in the other universe!
Crossover - Babylon 5 & TV X-overs - Rated: T - English - Sci-Fi - Chapters: 30 - Words: 208,435 - Reviews: 254 - Favs: 223 - Follows: 220 - Updated: 5/26/2012 - Published: 2/25/2005
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: 505 - Favs: 688 - Follows: 535 - Updated: 4/19/2012 - Published: 7/13/2007 - GDI Commander, Kane
The Best Revenge
by Arsinoe de Blassenville reviews
AU. Yes, the old Snape retrieves Harry from the Dursleys formula. I just had to write one. Everything changes, because the best revenge is living well. T for Mentor Snape's occasional naughty language. Supportive Minerva. Over three million hits!
Harry Potter - Rated: T - English - Drama/Adventure - Chapters: 47 - Words: 213,669 - Reviews: 6406 - Favs: 8,099 - Follows: 4,146 - Updated: 9/10/2011 - Published: 3/9/2009 - Harry P., Severus S. - Complete
Point of a Spear
by Z98 reviews
After decades of stagnation, a series of events begin the reunification of the Brotherhood of Nod. With GDI having grown complacent over the years, the storm about to hit will test the resolve of both sides. Tiberian Sun and Firestorm novelization.
Command & Conquer - Rated: T - English - Sci-Fi - Chapters: 12 - Words: 88,624 - Reviews: 56 - Favs: 33 - Follows: 34 - Updated: 1/1/2011 - Published: 7/14/2007
by DobbyElfLord reviews
Sequel to Altered Destinies: Harry returns to his original time to find the wizarding world changed due to his actions in the past. Not only does his family and friends await, but so does a new prophecy. Reading AD first is required to understand!
Harry Potter - Rated: T - English - Suspense/Mystery - Chapters: 19 - Words: 147,171 - Reviews: 2130 - Favs: 3,065 - Follows: 3,393 - Updated: 11/8/2010 - Published: 3/23/2008 - Harry P., Tom R. Jr.
Oh God Not Again!
by Sarah1281 reviews
So maybe everything didn't work out perfectly for Harry. Still, most of his friends survived, he'd gotten married, and was about to become a father. If only he'd have stayed away from the Veil, he wouldn't have had to go back and do everything AGAIN.
Harry Potter - Rated: K+ - English - Humor/Parody - Chapters: 50 - Words: 162,639 - Reviews: 11502 - Favs: 16,336 - Follows: 6,537 - Updated: 12/22/2009 - Published: 9/13/2008 - Harry P. - Complete
Half Life 2: Shephard's Epic
by BlindAcquiescence reviews
Memory restored, Adrian Shephard sets out to bring the Combine to their knees and free Earth from their occupation.
Half-Life - Rated: T - English - Adventure/Sci-Fi - Chapters: 38 - Words: 169,645 - Reviews: 395 - Favs: 147 - Follows: 104 - Updated: 8/11/2009 - Published: 1/5/2006
Stargate: Farthest Stars
by BigRedCanuck reviews
When Daniel Jackson and a team of archeologists uncover a new revelation about the Atlantian's past, before they fled Earth the first time, the Stargate Universe as we know it expands sevenfold. Please Read&Review
Stargate: SG-1 - Rated: T - English - Sci-Fi/Adventure - Chapters: 22 - Words: 52,550 - Reviews: 137 - Favs: 135 - Follows: 158 - Updated: 6/23/2009 - Published: 6/8/2005
by Alara Rogers reviews
Three years ago, Q lost his powers as shown in the episode Deja Q , only in this story, he never got them back. Contains suicide attempts, violence. Further content warnings for Part IV in author's note on Part IV.
StarTrek: The Next Generation - Rated: M - English - Drama - Chapters: 4 - Words: 252,805 - Reviews: 58 - Favs: 64 - Follows: 39 - Updated: 1/30/2009 - Published: 1/29/2001 - Q
Tale of the Bhaalspawn
by Capt. Incredible reviews
From their first capture by Irenicus to the battle in the Hells, the story of a Bhaalspawn sorcerer, his companions, and the path each walks to their own destiny.
Baldur's Gate - Rated: T - English - Adventure/Romance - Chapters: 104 - Words: 736,817 - Reviews: 372 - Favs: 108 - Follows: 41 - Updated: 12/9/2008 - Published: 10/7/2006 - Complete
Spearhead: When Hope is Lost
by Darksider reviews
StargateBSG2003 UPDATED APRIL08! Pursued and harrassed across the Galaxy, the Colonial Remnant is finally brought to heel by the Cylon Fleet. Out of luck and out of hope, their only chance lies with the discovery of a strange circular ring...
TV X-overs - Rated: T - English - Sci-Fi/Adventure - Chapters: 17 - Words: 125,698 - Reviews: 324 - Favs: 197 - Follows: 199 - Updated: 9/7/2008 - Published: 3/2/2005
The Dilgar War
by Lord of Misrule reviews
It was the event that started it all. Thirty years before Babylon 5 the Dilgar race launched an Invasion of League space, a war which would cost Billions of lives, whole races destroyed and at the end give birth to a new super power The Earth Alliance
Babylon 5 - Rated: T - English - Drama/Adventure - Chapters: 104 - Words: 1,222,457 - Reviews: 211 - Favs: 348 - Follows: 146 - Updated: 8/19/2008 - Published: 9/26/2005 - Complete
The Rift Saga
by Pure Sabacc reviews
In the tradition of the Star Wars Star Trek crossover, the fates of universes manifold are intertwined, and placed in the hands of a few lost beings, displaced in space and time.
X-overs - Rated: T - English - Sci-Fi/Adventure - Chapters: 56 - Words: 388,134 - Reviews: 147 - Favs: 102 - Follows: 67 - Updated: 8/14/2008 - Published: 3/31/2005 - Complete
A New Age
by entilza reviews
A Wormhole transports several ships from the Star Trek Galaxy to the Imperium of Mankind. REWORK OF DARK FUTURE
Warhammer - Rated: T - English - Adventure - Chapters: 71 - Words: 267,076 - Reviews: 937 - Favs: 234 - Follows: 195 - Updated: 7/8/2008 - Published: 7/29/2005
by RaMeryt reviews
Harry's 6th year. A Professor that had sworn he would never come back, returns. After all, never is a very long time for someone like him. And he isn't the DADA professor. He is a friend of Snape's. HPHL crossover. Methos/Cassandra/HP characters
Harry Potter - Rated: T - English - Adventure/Mystery - Chapters: 21 - Words: 117,748 - Reviews: 228 - Favs: 185 - Follows: 180 - Updated: 5/18/2008 - Published: 8/14/2004 - Severus S.
The Best of both universes
by Janusi reviews
A crossover between Babylon 5 and Star Trek. Stranded in another galaxy, Captain Walker must make a new home for his crew and fight ancient enemies. Chapters 40a is up at last! PERMANENT HIATUS
Crossover - Babylon 5 & TV X-overs - Rated: T - English - Chapters: 41 - Words: 154,042 - Reviews: 501 - Favs: 262 - Follows: 227 - Updated: 4/14/2008 - Published: 7/29/2004
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: 215 - Favs: 439 - Follows: 459 - Updated: 6/18/2007 - Published: 11/2/2005
Homeworld Bound A SAAB NBSG crossover story Book 1
by JonHarper 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: 116 - Favs: 166 - Follows: 99 - Updated: 3/17/2007 - Published: 4/15/2005 - Complete
Chronicles of the Crusade Book 1: The Gateway
by JonHarper 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: 241 - Follows: 123 - Updated: 8/23/2006 - Published: 10/4/2005 - Complete
Those Who Stand
by AlbertG reviews
The B5StarTrek crossover. The Armageddon Conflict continues in Chapter 26. Janeway and her crew are here. Londo has made it to Centauri Prime and so have the Minbari! The tides of war are beginning.
TV X-overs - Rated: T - English - Sci-Fi/Adventure - Chapters: 58 - Words: 266,425 - Reviews: 575 - Favs: 203 - Follows: 91 - Updated: 3/31/2006 - Published: 10/31/2003 - Complete
Pools Of Shadow, Pools of Light
by cmdrjones reviews
Enterprise D vs the Devastator, along with a few new surprises. Prelude and inteludes continued... the mysteries get more complicated....
TV X-overs - Rated: T - English - Sci-Fi/Drama - Chapters: 16 - Words: 28,603 - Reviews: 50 - Favs: 17 - Follows: 17 - Updated: 1/10/2006 - Published: 7/16/2005
Consequences of Actions
by Bob Regent reviews
StargateBabylon 5 crossover. A SGC ship fighting the Goauld discovers that they aren't the only enemy Earth has to worry about. Now Completed, Look out for Book two.
Crossover - Stargate: SG-1 & TV X-overs - Rated: T - English - Sci-Fi/Adventure - Chapters: 29 - Words: 105,819 - Reviews: 266 - Favs: 337 - Follows: 147 - Updated: 11/16/2005 - Published: 1/28/2005 - Complete
Sort: Category . Published . Updated . Title . Words . Chapters . Reviews . Status .
Stargate: Day of Defiance reviews
The year is 2008, earth is in turmoil, nations are falling in military coups across the globe, friendships are falling apart between once trusted allies, and the greatest secret the world has even known is about to be disclosed in the worse possible way.
TV X-overs - Rated: T - English - Sci-Fi/Adventure - Chapters: 6 - Words: 20,604 - Reviews: 22 - Favs: 23 - Follows: 38 - Updated: 7/12/2006 - Published: 7/14/2005
Dawn of Thunder: The Invisible War reviews
The Aschen are on a warpath, the Romulans are preparing for one valiant defense of their homeworld. Meanwhile the Alliance takes the first uneasy steps towards liberating the protectorate worlds, ignorant of the war raging onwards.
TV X-overs - Rated: T - English - Sci-Fi/Adventure - Chapters: 1 - Words: 4,271 - Reviews: 2 - Favs: 5 - Follows: 9 - Published: 3/9/2006
Stargate The Tiberian Outbreak reviews
Disclosure had happened 10 years before, and humanity was struggling against the constant goa'uld threat to this day, but what if the threat was not just a galactic one, but something much more internal? Stargate Command and Conquer Crossover
TV X-overs - Rated: T - English - Sci-Fi/Adventure - Chapters: 22 - Words: 53,226 - Reviews: 20 - Favs: 29 - Follows: 20 - Updated: 7/14/2005 - Published: 3/31/2005
Dawn of Thunder : Strange Conclusions reviews
The Endeavor, the first RSS Prometheus is sent to scout local space. Instead, they find a war of extermination as the Aschen move on a local race. Will the Tau'ri be able to save their new friends from the Aschen? Or will another potential ally be lost?
TV X-overs - Rated: T - English - Sci-Fi/Adventure - Chapters: 24 - Words: 26,992 - Reviews: 21 - Favs: 19 - Follows: 12 - Updated: 7/6/2005 - Published: 2/27/2005