It's been sitting in my backlog for years. I don't know why I decided to finally load it up, but holy crap, it's awesome. So impressed that it's not just a "level pack" for the original game, but expands the mythology behind the world. of the early characters I found just so endearing, and I'm not usually a fan of the Ricky Gervais style of humor (his show Extras notwithstanding).
Trying to get my friend to play it too. Like me, he's owned it for years but never played it.
Any huge fans of Portal out there?