We will not get to play Final Fantasy XIII-2 until January of next year. That sucks. Why don't you wind down with the musical stylings of Jason Yang, a very talented violinist who also if very proficient with other instruments.
In this video he plays the "Main" and "Battle" themes from Final Fantasy XIII using just himself, electric violins, keyboard, and drums. If you enjoyed this video, you'll also enjoy his rendition of the Game of Thrones theme on violins.
[Video via JasonYangViolin]

