1up had the chance to sit down with Valve to talk about Half-Life 2: Episode 2, Portal, and Team Fortress 2. They've come away with some great information, with probably the most exciting information focused around Portal. In a writeup of the visit, Matt Leone reveals that Portal is actually a part of the Half-Life 2 world. The protagonist is a new character, and eventually the fascinating puzzle/fps title will hook back into the Half-Life story at large. From the article: "'The origins of this character will be clear... eventually,' says Swift. Given that Portal has now been in development for just over a year, we wouldn't be surprised to see a few retroactive references pop up in Episode 1 as well, but for specifics we'll have to wait to hear more from the creepy narrator that taunts you while you play (yep, the same one from the first trailer)." For video and all the details, check out yesterday's episode of the 1up show.