The two disc, complete OST for Knights in the Nightmare was published by Five Records last year. I think it was a little too much for me. The sheer amount of music was overwhelming, and there was a heck of a lot of “filler” music, particularly on disc one. So, for the first time ever, I’m endorsing a truncated soundtrack release over the full.
If you pick up Knights in the Nightmare from Atlus USA, you may well receive some “Atlus spoils” alongside. One bonus is a beautiful artbook. The other is this one disc soundtrack. It takes the best tracks from the game (mostly the battle themes from disc two, though some of the good music from disc one also appears).
Also, Atlus, “I see what you did there!” Note the names of the tracks. If you compare them to the Japanese tracklist, you may get a little confused. Basically, this is a “spoiler-free” tracklist. They don’t mention anything about fighting Pische or Zolgonark in this tracklist. Instead, entirely new (and generic) names were picked for theme songs. Well, some of the names were clever.
In any case, Shigeki Hayashi’s best tracks are found here. All of the really memorable battle themes are here, as are the better tunes from the repeated menu/event music that you hear so much throughout the game. Considering the cost of importing a soundtrack these days, you’re really better off just picking up the game and soundtrack combo from Atlus USA instead of importing the two disc OST. That’s my opinion on the matter.