Stargate Atlantis, SG-1 Crossovers
Stargate Atlantis
Gene Therapy universe by LadyRa
1 Gene Therapy
Summary: An energy force hits a puddle jumper and Sheppard's team ends
up someplace very unexpected.
2 Never Alone
Summary: Lex and Clark have to go to Atlantis to help rescue the city. This starts the day after Gene Therapy ends, and you really need to go read that one first for this to make any sense.
Shore Leave series by Lenore
1 Lost Weekend
Summary: After the events of Jitters, Lex returns to his old haunts and meets John, who is spending his last weekend before shipping out to Afghanistan in Metropolis.
2 Shore Leave
Summary: Time off on Earth, and Rodney does some consulting for LuthorCorp. John tags along.
An Uncommon Love by Angelee
Summary: Sometimes chance meeting bring the best gifts of all.
Between The Earth And The Sea by Belladonna
Summary: Clark graduates college, about to start at the Daily Planet when Lionel and Gen. Lane try to capture him. He gets sent to an old friend of his dad, Gen. Jack O'Neill, who hides him in Atlantis
Stargate SG-1
Ancient Legacies by moiraithanatoio (Lachesis)
1 The Ancient
Summary: President Luthor is not as shocked when briefed on Stargate Command as one might have expected…
2 P9X-548
Summary: Superman’s identity as Clark Kent is revealed when Clark’s ‘saving people thing’ happens within the SGC.
3 The Fifth Race
Summary: Looking for terrestrial information on the race of Ancients, Jack and Daniel take a side trip to Smallville, Kansas.
Faustian Bargain by Medie
1 A Faustian Bargain
Summary: Chloe Sullivan's family? Kinda unique.
2 Waking Up Tok'ra (sequel)
Summary: So, yeah, Chloe's got this...um...snakey thing going on in her head?
Small Town Life by JA Baker
1 Small Town Life
Summary: Sam Carter ponders just how much her life has changed since she first heard of a town called Smallville...
2 Life Goes On (Sequel)
Summary: Clark is called in when the Atlantis expedition discovers a Kryptonian outpost in Pegasus, but he may not like what he finds... (Sam/Chloe)
A Kryptonian in King Arthur's Court
Summary: Season four of Smallville happened very differently. Some of the players weren't who you thought. And season five had a very different beginning. As for how SG-1 got involved sometime after their season nine, therein lies our tale.
Alien Neighborhood by PaBurke
Summary: Don't you hate being called in the middle of the night?
Clark Kent And SG-1: Crazy Q by SuperBear
Summary: It all begins when Jonathan Kent heals Daniel Jackson of lethal radiation poisoning. Then Clark and SG-1 are called to handle a crisis in which Q has gone insane, causing alternate worlds to combine together. As they search for Q, they find other worlds that combine elements of Smallville with Stargate Command.
Clark Kent And SG-1: Time Masters by SuperBear
Summary: When the Joker is given the power to create altered timelines, Clark and SG-1 must restore those timelines, including the one where Captain Kirk and Spock live in Smallville. They get occasional help from the guys on "The Big Bang Theory." That's when the Joker isn't messing with all their minds. Bonus feature: multiple SG-1's!
Destiny by Debi C
Summary: After a very odd dream, Daniel makes a discovery.
Kansas, She Said by HYPERFocused
Summary: Aliens and snakelike parasites: a common theme.
Keeper of the Light by mktoronto
Summary: An ascended Dr. Daniel Jackson visits a dreaming Chloe Sullivan. Years later, Superman brings them face to face.
Reality TV by Suzvoy
Summary: Umm, it's a fic! And it's a SV/SGA crossover! Ha! And it's silly, yes.
Part 1, Part 2, Part 3, Part 4 (incomplete) Still worth the read J
Rumors of My Death by HYPERFocused
Summary: Written for the Whitney Fordman Ficathon. AU for both Smallville season 4 and Stargate SG1. Chloe/Whitney
Sam Beckett In Belle Reve by SuperBear
Summary: Waging a tremendous battle inside his own mind, Sam Beckett needs the help of Clark Kent and Daniel Jackson to be free.
SV-1: Ra's Wrath by Brennah_K
Summary: Spawned from the Wednesday 100's Drabble Challenge: What if Clark and his ship goes elsewhere? SV 1's (not a typo): A Smallville/SG-1 crossover series written completely in drabbles.
Taxing by HYPERFocused
Summary: Death and Taxes. The Only…never mind.
The President Dawn Stiles Lex-Zod Duncan Skynet Crisis by SuperBear
Summary: Clark Kent and SG-1 learn of a world where Dawn Stiles took over the body of President Henry Hayes, just about the time Skynet tried to take over the world.
Unusual Meeting by Windyfontaine
Summary: Clark meets something unusual in the fields.
When Heroes Collide by canttouchthis87
Summary: When Superman enters the public eye, Stargate Command has some serious questions. Their quest leads them right to Chloe Sullivan and the rest of the Justice League.
Wormholes and Meteor Showers by Shall-Iin
Summary: The SG team finds evidence of a lost race that the Goauld are unable to infest and who legend say are imbued with vast physical powers beyond those all other races. They seek information about the lost race on Earth, where there is evidence they might have been.