When a pilot crash lands in front of the Atlantis gate team the question becomes where did they come from and are they a threat? Starts during Atlantis Season 1 and three months after the initial Cylon attack.

Oneshot. Wraith, meet Cylons. Cylons, meet Wraith. Have fun playing with each other.

Stargate/BSG crossover. A couple of months after Atlantis returns to Earth, a chance meeting between two groups of humans leads them both out of the dark.

Some of the Atlantis members unwillingly travel forward in time and find an unusual battle cruiser: the Battlestar Galactica. Pairings: Rodney McKay/Kara Thrace, Radek Zelenka/Elizabeth Weir, and Radek Zelenka/Kara Thrace-unrequited emotions

When the Colonial Fleet is detected moving towards Earth the SGC investigates, and neither side may find what they expect - or particularly like. AU set after Ark of Truth. SG1/SGA/nBSG Discontinued.

The Colonial Fleet and Rebel Cylons have finally made their way to Earth, only to find it a broken post-nuclear wasteland. Amidst the rubble and destruction one woman appears who offers them hope - and a fresh start. nBSG/SGA crossover. Oneshot. Rewrite.

As First Contact situations go, it could have gone better. But with the threat of the Wraith hanging over them the Colonials, Cylons and Tau'ri are just going to have to find a way to get along... Battlestar Galactica RDM Stargate Atlantis