Can anyone recommend or give their opinions any videogame or anime soundtracks that has a few decent jrock tracks? I've already downloaded or listened to most of the music from games I own or played that includes mostly Guilty Gear, SMT, Bloody Roar, Evil Zone to name a few thanks

my favourite jrock anime soundtracks are:
Noir - Salva Nos
Gravitation - Shining Collection
X TV Series - eX Dreams
X 1999 - X

I think you can give Nana a try