Ryu ga Gotoku 4 Densetsu wo Tsugumono Original Soundtrack Vol.1 (2010)

EVERYONE has to listen to Fang Marked Viper at least once in their life. That song is so good and yet so underutilized in the game itself. Most of the other songs are great as well, especially the battle themes for each character. Speed Star is my personal favorite of the battle themes.