There are some games, which worth double their normal value because of their music. Drakengard 3 is one of them for me. The music is absolutely stunning. I'm going to post here the boss musics, because they have the most impact. I hear BB already shouting at me "Steam, you lied! You don't only listen to ambient!" .
Sounds fitting for boss battles, especially if it's a fairly quick-paced game (never played it). The 4th one's pretty nice, I'd probably prefer an instrumental version though.