Theme from "The Terminator (Judgment Day Remix) - Brad Fiedel (http://www.youtube.com/watch?v=edeoQ75e8_Q) Yes it's the official theme, but damn it's a great fit and it ALWAYS puts me in the mood to play John.
The Vault of the Future - Mark Morgan (http://www.youtube.com/watch?v=Te_OdAC_biE)
FFlame of the Ancient World - Mark Morgan (http://www.youtube.com/watch?v=RqtwpleVejY)
All Along the Watchtower - Bear McCreary cover from Battlestar Galactica soundtrack. (http://www.youtube.com/watch?v=Ka_sHy9cVH0)
Metal Messiah - Judas Priest (http://www.youtube.com/watch?v=_iIFrHdW0is)