Franchises

Here is every game I've looked at that is part of a long-running series.

Castlevania

Castlevania 1
Castlevania 3: Dracula's Curse
Super Castlevania 4
Castlevania: Bloodlines

Final Fantasy

Final Fantasy 7
Final Fantasy 12

Megaman

Megaman 1
Megaman 2
Megaman 3
Megaman 4
Megaman 5
Megaman 6
Megaman 7