I don't have internet access (and therefore don't have Steam) on my PS3, so I couldn't get the Fall of the Space Core DLC in my game. However, that didn't stop me from coming up with my own Skyrim/Portal crossover...
Allow me to reintroduce Chell, late and unlamented of Aperture Science, who has somehow found herself in Skyrim:
[Tried to put a picture here, but it won't even let me post links. Boooo.]
A hapless "Breton" battlemage who found herself in a puddle of her own puke in the temple of Dibella after a drinking contest with "Sam" at the Bannered Mare, Chell's misfortune only worsened when she was framed for murder, got into a prison brawl with an orc, nearly got mauled by a bear, had to fight off a horde of Draugr and was tricked into joining the local daedric cannibal cult (good thing the Vigilants of Stendarr svck at their jobs). If only she had a Companion Cube to cuddle up to...