New Half-Life 2, Portal, and Team Fortress vids

YouTube continues to prove its worth as we've just been tipped to a whole bunch of new Valve-related videos from the Leipzig convention in Germany. With such good physics gameplay, it's certainly hard to play favorites on this one because they all look completely worthwhile.

Either click the links or check out the videos after the break. Which one impresses you the most?
[Thanks, Sub]

This article was originally published on Joystiq.