Been slowing trudging through this for the best part of a year, but finally got it done.
Extend is likely the best of the PSP games in terms of the large song list, amount of customation and content on offer. Despite all that, I find myself preferring the songlist of 1st, which is ultimately what matters most to me in a rhythm game. Still, the mechanics of the OG/F DIVA engine were first solidified here, and it's worth your time to see where DIVA as we know it really began.
Extend is likely the best of the PSP games in terms of the large song list, amount of customation and content on offer. Despite all that, I find myself preferring the songlist of 1st, which is ultimately what matters most to me in a rhythm game. Still, the mechanics of the OG/F DIVA engine were first solidified here, and it's worth your time to see where DIVA as we know it really began.