Man, the plot in FFVII is really something else. Scientist experiments on his son with a murderous The Thing-esque alien's DNA which they thought was a member of an ancient race but actually killed that ancient race and then said scientist's son learns about the circumstances of his birth and also misconceives who Jenova is and her purpose and his relation to her and flips his lid and declares himself an ancient when it's really just The Japanese Thing but it doesn't matter what he thinks Jenova is because he takes over Jenova, not the other way around, essentially becoming a more sentient, more dangerous form of the already creepy powerful alien from the beginning.
Meanwhile there's eco-terrorism, an in-progress worldwide industrialization going on, a modern corporation as a major villain (what other RPG did this?), and living, organic weapons that the earth made to protect itself.
The story in this game is really good, and really unique. It still holds up, too.