The video above will give you a visual sense of what we're talking about, but essentially Valve is messing around with Skryim.... No, not like deleting files or anything like that, but the typically cryptic company seems to have something going on in the land of Tamriel.
Valve released Fall of the Space Core, Vol 1 yesterday as a clever little The Elder Scrolls V: Skyrim PC mod that crash lands the Space-Personality Core in Skyrim. Pretty impressive stuff in the engine.
Still, users have discovered something hinting at a Portal 2-themed quest in the game that hasn't been fully uncovered yet. Maybe you need to take the personality core somewhere? I don't have Skryim on the PC, but if this continues down some absurdly amazing and brilliant path, I don't think I'll be able to resist buying a second copy of the game.