I admit, this thread is an excuse to remember everyone of how AMAZING House of the Dead OVERKILL's soundtrack is.
I mean, who would expect that a non numbered House of the Dead game from a British studio would come out with amazing tunes like these:
THOTD Overkill: Beautiful Mind
THOD Overkill: One Night In Bayou
THOTD Overkill: Torn Out Twisted
THOTD Overkill: Get Funky
THOTD Overkill: Papa Caesar
THOTD Overkill: Zombie Shuffle
I loved this game and Headstrong is known for making solid stuff, but the soundtrack really came out of nowhere for me.
I love it when lower profile games surprise me with their OSTs like this.
And yes, Nier. Any other examples?
EDIT:
Also, the Bit Trip games.
I dont have these games (yet), but i have been listening to their OSTs for some time now. Awesome stuff
http://www.youtube.com/watch?v=erVyoXPfhrE
http://www.youtube.com/watch?v=HhMxnq37vD4&feature=related