Portal, we're addicted to it. What started off as a fling with the perceived one-night floozy of the Orange Box lineup has turned into a serious long-term relationship. We find ourselves going through the other Orange Box offerings – and real life, we'll be honest – thinking, "Gee, I wish I had the Portal gun here."
Thanks to hard work and years of studying (stay in school, kids) the alchemists at Primotech have transformed blood and sweat into an incredible hack that lets you create portals all over the lovely, quasi-European walls of Half-Life 2's City 17. Some notes: you'll obviously need the PC version, you'll need to follow some dozen steps full of words like "hosing," and you'll want to keep a fresh pair of pants nearby. But before you get to all that, peep the video which is safely contained after the break.