http://www.youtube.com/watch?v=ytT9J2qX0sM

Mine is the one that plays in that scene when the Ark starts changing and during the first fight with Yrriev.

I just have no clue which song it is. ><

Which was your favorite tune from this game?

The theme that plays during the boss fight with Yuriev (on foot) is sadly not on the OST. =/

But my favorite is Godsibb, which happens to play during the second part of the battle with Yuriev. =p