[A short YouTube video series][link] by [Virtually Reality][vr] contributor Soul Grafitti, in three parts: [Setting the Scene][link], [Character Design][part2], [Narrative & Culture][part3].
[link]: http://www.youtube.com/watch?v=qXPkDQnM0JI “The Art Of TF2 Part 1”
[part2]: http://www.youtube.com/watch?v=p3MB1s2dV5g “The Art Of TF2 Part 2”
[part3]: http://www.youtube.com/watch?v=S0qrAbHOLAA “The Art Of TF2 Part 3”
[vr]: http://www.virtuallyreality.net/ “Virtually Reality”