19. Although this is the 4th game in the series, it feels like the 2nd game for most people. Basically it went like this, the first game got released on the PS3, the 2nd game on PSP in Japan and elsewhere, the 3rd game on PSP only in Japan, and the 4th game on PS4 worldwide. It was the last game made by the company in 5 years.
16. This is the entry in this series to put the game on the map for most western players despite being so deep into the series. Despite being deep in the series, it was the first game in the series to use the correct name instead of the weird localized name.