Indeed, the game rather fulfills its specification, either:
-The Graphics, certainly one of the best PSP games without any worry.
-The Music, in the same spirit as the 2 and the 3, alternating ambient music, action, and disturbing.
-The Scenario, instead developed although may be a little far-fetched at times.
-Aya, Spend a few hours with the best of heroin jv ever created, it is priceless: ')
-The Difficulty. Far from being like 95% of the current games which limits take us for mental brainless, here we have a game that offers a real challenge there or hard mode is REALLY hard, and not much fun.
Take it for sure if you've done the first two (or even just the second), also to take if you're a fan of action / RPG, or if you just want to play a good play.